2972755
Descripción
Test por alejandro lopez 8876, actualizado hace más de 1 año
Más
Pregunta 1
Pregunta
If the following command is executed: CREATE DATABASE test What is the page size (in kilobytes) of
the database?
Respuesta
-
4
-
8
-
16
-
32
Pregunta 2
Pregunta
Given the following DDL statement: CREATE TABLE sales (item CHAR(20)); If a DBA wishes to
increase the size of the ITEM column, which SQL statement needs to be used?
Respuesta
-
ALTER TABLE sales ADD COLUMN item CHAR(40);
-
ALTER TABLE sales ALTER COLUMN item CHAR(40);
-
ALTER TABLE sales MODIFY COLUMN item CHAR(40);
-
ALTER TABLE sales ALTER COLUMN item SET DATA TYPE CHAR(40);
Pregunta 3
Pregunta
Which DB2 object can be used to improve the execution performance of qualified SELECT statements?
Respuesta
-
Trigger
-
SQL Procedure
-
Sequence Object
-
Materialized Query Table
Pregunta 4
Pregunta
When is it appropriate to use a sequence?
Respuesta
-
When you want to control the order in which triggers are fired.
-
When you want to control the order in which stored procedures can be invoked.
-
When you want to automatically generate a numeric value that is not tied to any specific column or table.
-
When you want to automatically generate a numeric value for each row that is added to a specific table.
Pregunta 5
Pregunta
5.Which clause should be included in a ALTER TABLE statement to update a table definition with a new
column?
Respuesta
-
ADD COLUMN
-
ALTER COLUMN
-
APPEND COLUMN
-
RENAME COLUMN
Pregunta 6
Pregunta
Which object is a stored procedure defined into?
Respuesta
-
Table
-
Schema
-
Package
-
Database
Pregunta 7
Pregunta
Which action needs to be performed in order to complete the definition of an application-period temporal
table?
Respuesta
-
A transaction-start-id column must be defined for the table.
-
A history table must be defined and associated with the base table.
-
A BUSINESS_TIME period must be specified in a CREATE or ALTER of the table.
-
A unique index must be created that prevents overlapping of the BUSINESS_TIME period of the table.
Pregunta 8
Pregunta
What functionality allows users to perform a UNION operation between a DB2 table and an Oracle
view?
Respuesta
-
Oracle connect
-
Trusted context
-
Oracle federation
-
Distributed request
Pregunta 9
Pregunta
You have a business need to query DB2 10 and DB2 9 databases and you want to write an application
that can run on most platforms unchanged. Which interface would you use to achieve your goal?
Respuesta
-
CLI
-
XML
-
JDBC
-
RUBY
Pregunta 10
Pregunta
Which DB2 object is used to provide a logical grouping of other database objects?
Respuesta
-
Alias
-
Index
-
Schema
-
Collection
Pregunta 11
Pregunta
What are two valid objects that can be created in DB2? (Choose two.)
Respuesta
-
Tree
-
Node
-
Trigger
-
Contexts
-
Sequence
Pregunta 12
Pregunta
Which type of temporal table can be used to store only time-sensitive data?
Respuesta
-
Bitemporal
-
Time-period
-
System-period
-
Application-period
Pregunta 13
Pregunta
When an index is created for a table, where is the metadata for that index stored?
Respuesta
-
In the table definition
-
In the system catalog.
-
In the schema that the index resides in.
-
In the metadata of the table the index was created for.
Pregunta 14
Pregunta
Which product is used to customize execution environments for the purpose of controlling system
resources so that one department or service class does not overwhelm the system?
Respuesta
-
pureScale
-
Workload manager
-
Data partitioning feature
-
Self-tuning memory manager
Pregunta 15
Pregunta
What type of mechanism is a simple token value that is used to refer to a much bigger large object
(LOB)?
Respuesta
-
locator
-
pointer
-
address
-
reference
Pregunta 16
Pregunta
What type of large object (LOB) is used to store LOB data together with the formatted rows on data
pages, instead of in a separate LOB storage object?
Respuesta
-
inline
-
binary
-
internal
-
partitioned
Pregunta 17
Pregunta
What is the purpose of the Query Tuner?
Respuesta
-
To automatically capture and stop rogue queries.
-
To provide recommendations and analysis for tuning a single query.
-
To provide recommendations and analysis for tuning up to 100 queries.
-
To recommend indexes and to guide DBAs through the process of creating new indexes.
Pregunta 18
Pregunta
Which tool allows users to connect to a DB2 database using a wizard?
Respuesta
-
Control Center
-
IBM Data Studio
-
Universal Connection Expert
-
DB2 Connection Pool Manager
Pregunta 19
Pregunta
Which two activities indicate the need for a data warehouse? (Choose two.)
Respuesta
-
Confirm product inventory.
-
Monitor product availability.
-
Summarize sales by region.
-
Identify patterns for products sold in the last five years.
-
Associate one or more products with a purchase order.
Pregunta 20
Pregunta
What is the primary function of an Online Transaction Processing (OLTP) workload?
Respuesta
-
To combine data from multiple sources.
-
To discover hidden relationships in data.
-
To analyze large amounts of data to find patterns.
-
To make changes to a small number of records within a single transaction.
Pregunta 21
Pregunta
Which isolation level offers the greatest protection of data but provides the least amount of
concurrency?
Respuesta
-
Read Stability (RS)
-
Cursor Stability (CS)
-
Repeatable Read (RR)
-
Uncommitted Read (UR)
Pregunta 22
Pregunta
What factor influences lock escalation?
Respuesta
-
Table size
-
Buffer space
-
Number of locks
-
Available real storage
Pregunta 23
Pregunta
Which type of lock allows the lock owner and all concurrent applications to read, but not update, the
locked data?
Respuesta
-
Share (S)
-
Update (U)
-
Exclusive (X)
-
Intent Exclusive (IX)
Pregunta 24
Pregunta
Application APP_A is performing updates to table TAB1 using the cursor stability (CS) isolation level. If
application APP_B wants to retrieve all rows from table TAB1 without waiting for application APP_A to
finish making updates, what isolation level must application APP_B use?
Respuesta
-
Read Stability (RS)
-
Repeatable Read (RR)
-
Uncommitted Read (UR)
-
Cursor Stability (CS)
Pregunta 25
Pregunta
Which statement will prevent concurrent application processes from performing anything other than
read-only operations against a table named TAB1?
Respuesta
-
LOCK TABLE tab1 IN READ MODE
-
LOCK TABLE tab1 IN SHARE MODE
-
LOCK TABLE tab1 IN EXCLUSIVE MODE
-
LOCK TABLE tab1 IN READ-ONLY MODE
Pregunta 26
Pregunta
When is an INTENT EXCLUSIVE (IX) lock required?
Respuesta
-
When a transaction intends to read or change data.
-
When a transaction intends to change but not read data.
-
When a transaction intends to read but not change data.
-
When a transaction intends to change the system catalog.
Pregunta 27
Pregunta
What is the act of exchanging one lock an application holds on a resource for a more restrictive lock on
the same resource known as?
Respuesta
-
Lock escalation
-
Lock substitution
-
Lock switch/exchange
-
Lock conversion/promotion
Pregunta 28
Pregunta
What isolation level prevents dirty reads, nonrepeatable reads, and phantoms?
Respuesta
-
Read stability (RS)
-
Cursor stability (CS)
-
Repeatable read (RR)
-
Uncommitted read (UR)
Pregunta 29
Pregunta
Which operation normally does NOT require an exclusive lock?
Respuesta
-
BIND
-
DROP
-
GRANT
-
SELECT
Pregunta 30
Pregunta
When a COMMIT statement is executed, what happens?
Respuesta
-
All locks held on the database are automatically released.
-
Data stored in global temporary tables is automatically deleted.
-
Open cursors defined WITH HOLD are closed, but their data is retained.
-
The current transaction is terminated and a new transaction boundary is started.
Pregunta 31
Pregunta
Which command is used to back out a subset of database changes that have been made within a unit
of work?
Respuesta
-
COMMIT
-
ROLLBACK
-
COMMIT TO SAVEPOINT
-
ROLLBACK TO SAVEPOINT
Pregunta 32
Pregunta
An SQL function designed to convert temperatures from Fahrenheit to Celsius was created as follows:
CREATE FUNCTION conv_temp (IN temp_f FLOAT
RETURNS INTEGER
NO EXTERNALACTION
SPECIFIC convert_ftoc
RETURN INT ((temp_f -32)/1.8)
How can this function be used to convert average temperature (AVG_TEMP) data stored in a table called
CLIMATE_INFO?
Respuesta
-
CALL conv_temp(climate_info.avg_temp);
-
CALL convert_ftoc(climate_info.avg_temp);
-
SELECT conv_temp(avg_temp) FROM climate_info;
-
SELECT convert_ftoc(avg_temp) FROM climate_info;
Pregunta 33
Pregunta
If a table named MY_TAB contains 100 rows and the following statement is executed:
DELETE FROM (SELECT * FROM my_tab ORDER BY col1 DESC
FETCH FIRST 5 ROWS ONLY) AS tmp;
What will happen?
Respuesta
-
The last 5 rows in the table will be deleted.
-
The first 5 rows in the table will be deleted.
-
The statement will fail because a subquery cannot be used with a DELETE statement.
-
The statement will fail because a table name was not specified with the DELETE statement.
Pregunta 34
Pregunta
Given an EMPLOYEES table and a SALES table, a user wants to produce a list of all employees and
their associated revenue, even if no revenue exists. Which SQL statement will produce the desired list?
Respuesta
-
SELECT employees.name, sales.revenue FROM employees INNER JOIN sales ON employees.id = sales.emp_id
-
SELECT employees.name, sales.revenue FROM employees INNER JOIN sales ON sales.emp_id = employees.id
-
SELECT employees.name, sales.revenue FROM sales LEFT OUTER JOIN employees ON employees.id = sales.emp_id
-
SELECT employees.name, sales.revenue FROM sales RIGHT OUTER JOIN employees ON employees.id = sales.emp_id
Pregunta 35
Pregunta
Which two operations are allowed in the body of an SQL scalar user-defined function? (Choose two.)
Respuesta
-
CALL statements.
-
External file access.
-
Use of a scratch pad.
-
COMMIT statements.
-
SQL control statements.
Pregunta 36
Pregunta
Which command will delete all rows from a table without generating log records?
Respuesta
-
TRIM
-
DROP
-
DELETE
-
TRUNCATE
Pregunta 37
Pregunta
Which function can be used to obtain values from XML documents that are to be inserted into one or
more tables?
Respuesta
-
XMLTABLE
-
XMLPARSE
-
XMLEXISTS
-
XMLATTRIBUTES
Pregunta 38
Pregunta
User USER1 wants to retrieve records from a table named EMPLOYEE that satisfy at least one of the
following criteria:
-The employee's hire date (HIREDATE) is before 1999 and the employee's salary (SALARY) is less than
$40,000.00 a year. -The employee has attended university
Which SQL statement will accomplish this?
Respuesta
-
SELECT * FROM employee WHERE (hiredate < '1999-01-01' AND salary < 40000) OR (education ='University')
-
SELECT * FROM employee WHERE (hiredate < '1999-01-01') OR (salary < 40000) OR (education ='University')
-
SELECT * FROM employee WHERE (hiredate < '1999-01-01' OR (salary < 40000 AND (education ='University')
-
SELECT * FROM employee WHERE (hiredate < '1999-01-01' AND salary < 40000 AND (education ='University')
Pregunta 39
Pregunta
Which SQL statement will retrieve the employee number (EMPNO), hire date (HIREDATE), and salary
(SALARY) for each employee from a table named EMPLOYEE who was hired before 1998 and earns a
salary of less than $35,000.00 per year?
Respuesta
-
SELECT empno, hiredate, salary FROM employee FOR hiredate < '1998-01-01' AND salary < 35000
-
SELECT empno, hiredate, salary FROM employee WHERE hiredate < '1998-01-01' AND salary < 35000
-
SELECT empno, hiredate, salary FROM employee WHERE hiredate < '1998-01-01' OR salary < 35000
-
SELECT empno, hiredate, salary FROM employee FOR hiredate < '1998-01-01' OR salary < 35000
Pregunta 40
Pregunta
If the following result set is desired:
Which SQL statement must be executed?
Respuesta
-
SELECT lastname, firstnme, salary, job FROM employee ORDER BY 3 FETCH FIRST 5 ROWS ONLY
-
SELECT lastname, firstnme, salary, job FROM employee ORDER BY 3 DESC FETCH FIRST 5 ROWS ONLY
-
SELECT lastname, firstnme, salary, job FROM employee ORDER BY 3 FETCH FIRST 5 ROWS
-
SELECT lastname, firstnme, salary, job FROM employee ORDER BY 3 DESC FETCH FIRST 5 ROWS
Pregunta 41
Pregunta
Which statement about INSERT operations is true?
Respuesta
-
The INSERT statement is used to insert rows into a table, view, or table function.
-
Inserted values must satisfy the conditions of any check constraints defined on the table.
-
If an INSERT statement omits any column from the inserted row that is defined as NULL or NOT NULL WITH DEFAULT, the statement will fail.
-
If the underlying table of a view being referenced by an INSERT statement has one or more unique indexes, each row inserted does not have to conform to the constraints imposed by those indexes.
Pregunta 42
Pregunta
Which statement about application-period temporal tables is true?
Respuesta
-
Consists of explicitly-supplied timestamps and a separate associated history table.
-
Is based on explicitly-supplied timestamps that define the time periods during which data is valid.
-
Is useful when one wants to keep both user-based period information and system-based historical information.
-
Consists of a pair of columns with database-manager maintained values that indicate the period when a row is current.
Pregunta 43
Pregunta
Which SQL statement should be used to select the minimum and maximum salaries (SALARY), by job
code (JOB), from a table EMPLOYEE?
Respuesta
-
SELECT job, MIN(salary), MAX(salary) FROM employee GROUP BY job;
-
SELECT job, MIN(salary), MAX(salary) FROM employee ORDER BY job;
-
SELECT job, MIN(salary), MAX(salary) FROM employee GROUP BY job, MIN(salary), MAX(salary);
-
SELECT JOB, MIN(salary), MAX(salary) FROM employee ORDER BY job, MIN(salary), MAX(salary);
Pregunta 44
Pregunta
In a trusted context environment, if a switch request is made with an authorization ID that is not
allowed on a trusted connection, what state is the connection placed in?
Respuesta
-
Locked
-
Waiting
-
Pending
-
Unconnected
Pregunta 45
Pregunta
If a user has been granted SYSCTRL authority, which activities can they perform?
Respuesta
-
Load operations
-
Backup/copy table spaces
-
Create and drop databases
-
Monitor database performance
Pregunta 46
Pregunta
What is the purpose of a role?
Respuesta
-
To define exactly what a specific user can do within a particular database once they have been authenticated.
-
To group a collection of privileges together so that they can be simultaneously granted to and revoked from multiple users.
-
To establish a credible relationship between DB2 and an external entity, such as a database administrator or a middleware server.
-
To group a collection of users together so that they can be simultaneously granted and revoked specific authorities and privileges.
Pregunta 47
Pregunta
Which SQL statement will give user USER1 the ability to assign a comment to a sequence named
MYSEQ?
Respuesta
-
GRANT ALTER ON SEQUENCE myseq TO user1
-
GRANT USAGE ON SEQUENCE myseq TO user1
-
GRANT SELECT ON SEQUENCE myseq TO user1
-
GRANT COMMENT ON SEQUENCE myseq TO user1
Pregunta 48
Pregunta
A column mask that is to be used for row and column access control (RCAC) was created with the
DISABLE option specified. What must be done if this mask is to be used to restrict access to data stored
in a table named EMPLOYEE?
Respuesta
-
The column mask must be enabled; the EMPLOYEE table must be altered to activate column access control.
-
The column mask must be enabled (column access control for the EMPLOYEE table will be activated automatically).
-
The EMPLOYEE table must be altered to activate column access control (the column mask will be enabled automatically).
-
The EMPLOYEE table must be altered to activate column access control; row permission must be granted to everyone who needs to use thecolumn mask.
Pregunta 49
Pregunta
User USER1 holds both DBADM and SECADM authority and you want to separate database
administration activities from security administration tasks. What authority must you have in order to
revoke SECADM authority from user USER1 and assign it to someone else?
Respuesta
-
DBADM
-
DBCTRL
-
SECADM
-
DBMAINT
Pregunta 50
Pregunta
A table named EMPLOYEE was created as follows:
Which action will prevent unauthorized users from accessing SSN data?
Respuesta
-
Assign the SSN column to a restricted role that only authorized users can access.
-
Only grant ACCESSCTRL authority for the SSN column to users who need to access SSN data.
-
Alter the table definition so that SSN data is stored in a separate schema that only authorized users can access.
-
Create a view for the EMPLOYEE table that does not contain the SSN column and require unauthorized users to use the view.
Pregunta 51
Pregunta
Which SQL statement will allow user USER1 to create a view on a table named EMPLOYEE?
Respuesta
-
GRANT CREATETAB ON DATABASE TO user1
-
GRANT SELECT ON TABLE employee TO user1
-
GRANT CREATEVIEW ON DATABASE TO user1
-
GRANT REFERENCES ON TABLE employee TO user1
Pregunta 52
Pregunta
A new user named USER1 needs to retrieve information from a database named MYDB. What
authority must be granted to user USER1?
Respuesta
-
DBCTRL authority
-
SQLADM authority
-
DATAACCESS authority
-
ACCESSCTRL authority
Pregunta 53
Pregunta
Which privilege is required to invoke a user defined function?
Respuesta
-
CALL
-
USAGE
-
EXECUTE
-
REFERENCES
Pregunta 54
Pregunta
Which statement is true about an index that is used to support a UNIQUE constraint?
Respuesta
-
It must not contain more than one column.
-
It cannot be used in a referential constraint.
-
It must be defined with the UNIQUE attribute.
-
It must be defined as UNIQUE WHERE NOT NULL.
Pregunta 55
Pregunta
Which statement regarding triggers is true?
Respuesta
-
Only one INSERT, UPDATE, or DELETE trigger can be defined per table.
-
Triggers cannot be modified, they must be dropped and recreated with new definitions.
-
Adding a trigger to a table that already has rows in it will cause triggered actions to be fired.
-
Triggers can only be fired one time per statement irrespective of the number of rows affected.
Pregunta 56
Pregunta
A table named STATES was created as follows:
CREATE TABLE states
(state_cd CHAR(2) NOT NULL,
state_desc CHAR(20));
CREATE UNIQUE INDEX indx1 ON states (state_cd);
if the following ALTER statement is executed:
ALTER TABLE states ADD PRIMARY KEY (state_cd);
What will happen?
Respuesta
-
An error will be returned and the operation will fail.
-
A warning will be returned and the unique index INDX1 will become the index for the primary key.
-
The primary key will be successfully added and the unique index INDX1 will be dropped and recreated as the primary key index.
-
The primary key will be successfully added, the unique index INDX1 will be dropped, and a new index will be created for the primary key.
Pregunta 57
Pregunta
When an application using a temporary table terminates or disconnects from the database
unexpectedly, what happens to the temporary table and any data stored in it?
Respuesta
-
The data in the table is deleted and the table persists.
-
The data in the table is deleted and the table is implicitly dropped.
-
The temporary table is converted to a base table and the data is deleted.
-
The temporary table is converted to a base table and the data is persistent.
Pregunta 58
Pregunta
When a user-defined function (UDF) is created and no schema is specified, what schema is used to
store the UDF?
Respuesta
-
The SYSIBM schema.
-
The SYSFUN schema.
-
A schema with the name of the UDF.
-
A schema with the userid of the UDF definer.
Pregunta 59
Pregunta
Which statement about triggers is true?
Respuesta
-
A trigger is designed to return specific types of values and contains executable code.
-
A trigger is designed to return specific types of values but contains no executable code.
-
A trigger performs actions to capture details about an activity like a join operation against multiple tables.
-
A trigger performs actions in response to an event like an INSERT, UPDATE or DELETE operation on a table.
Pregunta 60
Pregunta
Which two statements are true about foreign key constraints? (Choose two.)
Respuesta
-
The foreign key constraint columns must be supported by an index.
-
The foreign key constraint columns must be defined as NOT NULL.
-
The number and data types of foreign key constraint columns must match the parent key.
-
The columns of one foreign key constraint cannot be used in another foreign key constraint.
-
To define a foreign key constraint there must be an associated primary key or unique key in the same or different table.
Pregunta 61
Pregunta
What is the primary purpose of a view?
Respuesta
-
To enable uniqueness.
-
To ensure data clustering.
-
To combine data from multiple tables.
-
To optimize queries ran against multiple tables.
Pregunta 62
Pregunta
By default, a column defined as a TIMESTAMP includes which attributes?
Respuesta
-
No fractional digits or time zone.
-
6 fractional digits and no time zone.
-
12 fractional digits plus a time zone.
-
12 fractional digits and no time zone.
Pregunta 63
Pregunta
Which is NOT a valid reason for creating an index?
Respuesta
-
To allow queries to run more efficiently.
-
To enforce constraints such as uniqueness on index keys.
-
To order the columns of a table in ascending or descending sequence according to values in a row.
-
To order the rows of a table in ascending or descending sequence according to the values in a column.
Pregunta 64
Pregunta
To order the rows of a table in ascending or descending sequence according to the values in a column.
Respuesta
-
Unique constraint
-
Primary key constraint
-
Informational constraint
-
Column default constraint
Pregunta 65
Pregunta
Which statement is true regarding constraints?
Respuesta
-
A table can only have one unique key constraint.
-
A table can have multiple primary key constraints.
-
Informational constraints tell DB2 what rules the data conforms to, but the rules are not enforced.
-
Foreign key constraints are enforced on the values within the rows of a table, or between the rows of two tables, by a unique index on a foreignkey.
Pregunta 66
Pregunta
By default, where is the data stored for a column defined with an XML data type?
Respuesta
-
In an XML index.
-
In line with the rest of the data for the table.
-
In an XML storage object that is separate from the table.
-
In line with the rest of the data for the table, for XML columns less than 32KB.
Pregunta 67
Pregunta
Which statement about BEFORE triggers is FALSE?
Respuesta
-
A BEFORE trigger can be used to perform validation of input data.
-
A BEFORE trigger can be used to automatically generate values for newly inserted rows.
-
A BEFORE trigger is fired for each row in the set of affected rows before the trigger event executes.
-
A BEFORE trigger is fired for each row in the set of affected rows instead of executing the trigger event.
Pregunta 68
Pregunta
What is used in conjunction with a foreign key to define a relationship between two tables?
Respuesta
-
Primary key
-
Partitioning key
-
Check constraint
-
Unique constraint
Pregunta 69
Pregunta
Which case will require a sequence to be dropped and recreated instead of being modified by the
ALTER SEQUENCE statement?
Respuesta
-
Change the data type of the sequence.
-
Reset the sequence to its starting value.
-
Establish new minimum or maximum values.
-
Change the increment between future values.
Pregunta 70
Pregunta
Given the following statement:
GRANT DELETE ON TABLE sales TO User1 WITH GRANT OPTION;
Which statement is correct?
Respuesta
-
USER1 can only remove the SALES table.
-
USER1 can only remove records from the SALES table.
-
USER1 can remove the SALES table and grant the privilege to remove the SALES table to other users.
-
USER1 can remove records from the SALES table and grant the privilege to remove records from the SALES table to other users.
Pregunta 71
Pregunta
Which method for restricting data access relies on a SQL search condition that describes what set of
rows a user has access to?
Respuesta
-
Authentication
-
Authorities and privileges
-
Label-based access control
-
Row and column access control
Pregunta 72
Pregunta
Which SQL statement will take the ability to create tables in a table space named MYTBSP away from
user USER1?
Respuesta
-
REVOKE USE OF TABLESPACE mytbsp FROM user1
-
REVOKE ALTER ON TABLESPACE mytbsp FROM user1
-
REVOKE UPDATE OF TABLESPACE mytbsp FROM user1
-
REVOKE CREATETAB ON TABLESPACE mytbsp FROM user1
Pregunta 73
Pregunta
In a trusted context environment, if a switch request is made with an authorization ID that is not
allowed on a trusted connection, what state is the connection placed in?
Respuesta
-
Locked
-
Waiting
-
Pending
-
Unconnected
Pregunta 74
Pregunta
When is a mask used to limit access to data in a table?
Respuesta
-
When mandatory access control (MAC) is used to protect the table.
-
When discretionary access control (DAC) is used to protect the table.
-
When label-based access control (LBAC) is used to protect the table.
-
When row and column access control (RCAC) is used to protect the table.
Pregunta 75
Pregunta
What privilege is required to create a view on a table that you are not the owner of?
Respuesta
-
INSERT
-
SELECT
-
CREATE
-
TRIGGER
Pregunta 76
Pregunta
After creating several new indexes and executing RUNSTATS, user USER1 wants to re-create a
package that is stored in the database so it will take advantage of the new indexes. Which
authority/privilege must user USER1 be granted in order to re-create the package?
Respuesta
-
BIND
-
REBIND
-
BINDADD
-
BIND_REBIND
Pregunta 77
Pregunta
Which SQL statement will give a user named USER1 the ability to run an embedded SQL application
named BENEFITS that calls a package named CORPDATA.PKGA?
Respuesta
-
GRANT EXECUTE ON APPLICATION benefits TO user1
-
GRANT EXECUTE ON PACKAGE corpdata.pkga TO user1
-
GRANT EXECUTE ON APPLICATION PACKAGE corpdata.pkga TO user1
-
GRANT EXECUTE ON APPLICATION benefits USING PACKAGE corpdata.pkga TO user1
Pregunta 78
Pregunta
Which of the following privileges allow a user to update the comment on a sequence?
Respuesta
-
ALTER
-
USAGE
-
UPDATE
-
COMMENT
Pregunta 79
Pregunta
Which statement is valid about the Row and Column Access Control (RCAC) feature?
Respuesta
-
A row mask's access control rule is defined by an SQL CASE expression; a column permission's access control rule is defined by an SQLsearch condition.
-
A row permission's access control rule is defined by an SQL CASE expression; a column mask's access control rule is defined by an SQLsearch condition.
-
A row mask's access control rule is defined by an SQL search condition; a column permission's access control rule is defined by an SQL CASEexpression.
-
A row permission's access control rule is defined by an SQL search condition; a column mask's access control rule is defined by an SQL CASEexpression.
Pregunta 80
Pregunta
Which type of table should you use if you want to define specific time periods when data is valid?
Respuesta
-
Materialized query table
-
System-period temporal table
-
Declared global temporary table
-
Application-period temporal table
Pregunta 81
Pregunta
Which SQL statement will create a DB2 object that can be used to store numerical data as Canadian
currency?
Respuesta
-
CREATE DISTINCT ALIAS canadian_dollar AS DECIMAL (9,3) WITH COMPARISONS
-
CREATE DISTINCT TYPE canadian_dollar AS DECIMAL (9,3) WITH COMPARISONS
-
CREATE DISTINCT PROCEDURE canadian_dollar AS DECIMAL (9,3) WITH COMPARISONS
-
CREATE DISTINCT FUNCTION canadian_dollar AS DECIMAL (9,3) WITH COMPARISONS
Pregunta 82
Pregunta
Which object can be enabled for compression?
Respuesta
-
View
-
Buffer pool
-
Storage group
-
Temporary table
Pregunta 83
Pregunta
What is the minimum product required for DB2 connectivity across all platforms?
Respuesta
-
DB2 Personal Edition
-
DB2 Development Edition
-
DB2 Connect Personal Edition
-
DB2 Development Unlimited Edition
Pregunta 84
Pregunta
Given the SQL statement: CREATE ALIAS total_sales FOR sales Which statement is valid?
Respuesta
-
SALES can be the name of a schema.
-
SALES can be the name of a package.
-
SALES can be the name of an existing alias.
-
SALES can be the name of a declared global temporary table.
Pregunta 85
Pregunta
Which DB2 object limits the user's ability to retrieve data from a table by defining a SQL statement in
the object?
Respuesta
-
View
-
Index
-
Trigger
-
Check constraint
Pregunta 86
Pregunta
A table named EMPLOYEES was created as follows, What will be the results?
Respuesta
-
0
-
1
-
2
-
3
Pregunta 87
Pregunta
Which two DB2 objects can a view be derived from? (Choose two.)
Respuesta
-
View
-
Index
-
Table
-
Trigger
-
Procedure
Pregunta 88
Pregunta
Which protocol provides applications the ability to connect to and update multiple DB2 databases
within the same transaction?
Respuesta
-
Type-1 connect
-
Type-2 connect
-
Type-3 connect
-
Type-4 connect
Pregunta 89
Pregunta
Which statement about bitemporal tables is valid?
Respuesta
-
Bitemporal tables are system tables and can only be queried by the schema owner.
-
Creating a bitemporal table is similar to creating a regular table except users must specify a system time period column.
-
When data in a bitemporal table is updated, a row is added to it's associated history table.
-
Querying a bitemporal table will produce results for a complete timeline; a view must be created to obtain results for a specific time period.
Pregunta 90
Pregunta
Which object can a buffer pool be assigned to?
Respuesta
-
Schema
-
Table space
-
Storage group
-
Stored procedure
Pregunta 91
Pregunta
Which DB2 object is associated with PREVIOUS VALUE and NEXT VALUE expressions?
Respuesta
-
View
-
Table
-
Sequence
-
Identity Column
Pregunta 92
Pregunta
What needs to be defined in order to track changes made to a system-period temporal table over
time?
Respuesta
-
Once the row-begin, row-end, and transaction-start-id columns are created, all changes are tracked.
-
A history table must be created with identical columns to the base table and a unique index must be defined on the transaction-start-id column.
-
A history table must be created as a clone table of the base table after the row-begin, row-end, and transaction-start-id columns have beendefined.
-
A history table must be created with identical columns to the base table and then the base table altered with the ADD VERSIONING clause torelate it to the history table.
Pregunta 93
Pregunta
Which object is used to cache table and index data as it is read from disk?
Respuesta
-
Database
-
Buffer pool
-
Table space
-
Package cache
Pregunta 94
Pregunta
Which statement about large object (LOB) locators is true?
Respuesta
-
A LOB locator is a data type that is used to store LOB data in binary files.
-
A LOB locator is a data type that is used to store LOB data in a database.
-
A LOB locator represents a value for a LOB resource that is stored in a database.
-
A LOB locator represents a value for a LOB resource that is stored in a binary file.
Pregunta 95
Pregunta
Which DB2 product is a database cluster solution for non-mainframe platforms and is best suited for
Online Transaction Processing (OLTP) workloads?
Respuesta
-
DB2 Connect
-
DB2 pureScale
-
Workload Manager
-
High Availability Disaster Recovery
Pregunta 96
Pregunta
What type of large object (LOB) is used to store LOB data together with the formatted rows on data
pages, instead of in a separate LOB storage object?
Respuesta
-
inline
-
binary
-
internal
-
partitioned
Pregunta 97
Pregunta
Which product replaced the Control Center used in versions prior to DB2 v10?
Respuesta
-
IBM Data Studio
-
IBM Administrator
-
IBM Data Manager
-
IBM Command Center
Pregunta 98
Pregunta
Which DB2 product is NOT suitable for very large data warehouse applications?
Respuesta
-
DB2 for i
-
DB2 for AIX
-
DB2 for z/OS
-
DB2 for Linux
Pregunta 99
Pregunta
Which platform supports DB2 pureScale environments?
Respuesta
-
AIX
-
iOS
-
z/OS
-
Windows
Pregunta 100
Pregunta
Which tool allows users to connect to a DB2 database using a wizard?
Respuesta
-
Control Center
-
IBM Data Studio
-
Universal Connection Expert
-
DB2 Connection Pool Manager
Pregunta 101
Pregunta
A table named SALES contains a record for every sales transaction a company processes. A user
wishes to see the number of transactions that are made by each salesman. Which SQL statement will
produce the desired results?
Respuesta
-
SELECT name, COUNT(*) AS transactions FROM sales
-
SELECT name, COUNT(DISTINCT name) AS transactions FROM sales
-
SELECT name, COUNT(*) AS transactions FROM sales GROUP BY name
-
SELECT DISTINCT name, COUNT(*) AS transactions FROM sales GROUP BY transactions
Pregunta 102
Pregunta
Which statement about roll back operations is correct?
Respuesta
-
When a ROLLBACK statement is executed, all locks held by the terminating transaction are released.
-
When a ROLLBACK TO SAVEPOINT statement is executed, all locks acquired up to the savepoint are released.
-
When a ROLLBACK TO SAVEPOINT statement is executed, all locks acquired after the savepoint are released.
-
When a ROLLBACK statement is executed, all locks acquired for open cursors that were declared WITH HOLD, are held.
Pregunta 103
Pregunta
When a COMMIT statement is executed, what happens?
Respuesta
-
All locks held on the database are automatically released.
-
Data stored in global temporary tables is automatically deleted.
-
Open cursors defined WITH HOLD are closed, but their data is retained.
-
The current transaction is terminated and a new transaction boundary is started.
Pregunta 104
Pregunta
Which SQL statement would be used to retrieve only salaries that are greater than $100,000.00 from
a table named EMPLOYEE?
Respuesta
-
SELECT * FROM employee WHERE salary < 100000
-
SELECT salary FROM employee WHERE salary > 100000
-
SELECT salary FROM employee WHERE salary > 100,000.00
-
SELECT * FROM employee WHERE salary GREATER THAN 100000
Pregunta 105
Pregunta
Which SQL statement should be used to retrieve the minimum and maximum salaries (SALARY) for
each job code (JOB), sorted by job code, from a table named EMPLOYEE?
Respuesta
-
SELECT job, MIN(salary), MAX(salary) FROM employee GROUP BY job ORDER BY job;
-
SELECT job, MIN(salary), MAX(salary) FROM employee ORDER BY job;
-
SELECT job, MIN(salary), MAX(salary) FROM employee GROUP BY SALARY ORDER BY job;
-
SELECT job, MIN(salary), MAX(salary) FROM employee GROUP BY MIN(salary), MAX(salary) ORDER BY job;
Pregunta 106
Pregunta
If a table named MY_TAB contains 100 rows and the following statement is executed:
Respuesta
-
0
-
1
-
10
-
99
Pregunta 107
Pregunta
An SQL function named DEPT_INFO was created as follows:
What is the correct way to use this function in a query?
Respuesta
-
SELECT dept_info(dept_id, dept_name)
-
SELECT dept_id, dept_name FROM dept_info()
-
SELECT TABLE dept_id, dept_name FROM dept_info()
-
SELECT dept_id, dept_name FROM TABLE(dept_info()) AS results
Pregunta 108
Pregunta
Which type of stored procedure is not associated with an external application program?
Respuesta
-
A Java stored procedure.
-
A REXX stored procedure.
-
A native SQL stored procedure.
-
An external SQL stored procedure.
Pregunta 109
Pregunta
Which SQL statement will retrieve the department number (WORKDEPT) and average departmental
salary (SALARY) for all departments in a table named EMPLOYEE and arrange the result set in
ascending order by average departmental salary?
Respuesta
-
SELECT workdept, AVG(salary) FROM employee ORDER BY workdept GROUP BY 2
-
SELECT workdept, AVG(salary) FROM employee ORDER BY workdept ARRANGE BY 2
-
SELECT workdept, AVERAGE(salary) FROM employee GROUP BY workdept ORDER BY 2
-
SELECT workdept, AVG(salary) FROM employee GROUP BY workdept ORDER BY 2
Pregunta 110
Pregunta
Which statement about system-period temporal tables is true?
Respuesta
-
They store user-based period information.
-
They do not have a separate history table.
-
They can be queried without a time period specification.
-
They manage data based on time criteria specified by users or applications.
Pregunta 111
Pregunta
A table named DEPARTMENT contains the following data:
What will happen?
Respuesta
-
The statement will fail because a subquery cannot be used in an UPDATE statement.
-
The statement will fail because the result set produced by the subquery will contain more than one row.
-
The statement will succeed; the last record retrieved by the subquery will be used to provide a WORKDEPT value for the update operation.
-
The statement will succeed; the first record retrieved by the subquery will be used to provide a WORKDEPT value for the update operation
Pregunta 112
Pregunta
Which statement about UPDATE processing is FALSE?
Respuesta
-
The UPDATE statement logs the before and after value of every column it modifies.
-
A searched UPDATE is used to update one or more rows and a positioned UPDATE is used to update exactly one row.
-
When the UPDATE statement modifies parent key columns, the value of corresponding foreign key columns are also modified.
-
The UPDATE statement modifies the values of specified columns in the rows of a table, view, or underlying table(s) of a specified fullselect.
Pregunta 113
Pregunta
Given the following statements:
What will be the result?
Respuesta
-
Joe Smith
-
<name>Joe Smith</name>
-
<name>Joe Smith></name><name>DB2</name>
-
<employeeinfo><name>Joe Smith</name></employeeinfo>
Pregunta 114
Pregunta
A table named STATES has the following columns: STATE_CD, REGION_CD, and STATE_NAME.
Which SQL statement will return the number of states in each region, ordered by number of states?
Respuesta
-
SELECT state_cd, COUNT(*) FROM states ORDER BY COUNT(*);
-
SELECT state_cd, COUNT(*) FROM states GROUP BY state_cd ORDER BY state_cd;
-
SELECT region_cd, COUNT(*) FROM states GROUP BY state_cd ORDER BY COUNT(*);
-
SELECT region_cd, COUNT(*) FROM states GROUP BY region_cd ORDER BY COUNT(*);
Pregunta 115
Pregunta
When a user-defined function (UDF) is created and no schema is specified, what schema is used to
store the UDF?
Respuesta
-
The SYSIBM schema.
-
The SYSFUN schema.
-
A schema with the name of the UDF.
-
A schema with the userid of the UDF definer.
Pregunta 116
Pregunta
What is a function of a table check constraint?
Respuesta
-
To provide a method of avoiding duplicate entries for a column
-
To provide a method of ensuring a column's value are within a specific range
-
To ensure that XML columns are properly populated in an associated XML table space
-
To enforce relationships between tables by checking the existence of rows in one table against another.
Pregunta 117
Pregunta
which statement about foreign keys is true?
Respuesta
-
A table can have only one foreign key
-
Foreign keys can only be defined when a table is created
-
A foreign key can be defined on a column or a set of columns in a table
-
Foreign keys are enforced only during the execution of INSERT statements
Pregunta 118
Pregunta
which type of table is best suited for recording results from application data manipulation that is not required to be persistent?
Respuesta
-
Base table
-
Temporal table
-
Transition table
-
Temporary table
Pregunta 119
Pregunta
Which statement regarding referential integrity constraints is true?
Respuesta
-
Multiple primary keys can be defined for a table
-
A foreign key can reference multiple primary keys
-
A primary key can be referenced by only one foreign key
-
Primary keys and foreign keys are used to define relationships
Pregunta 120
Pregunta
Which database object provides an alternative way of describing data that exists in one or more base tables?
Respuesta
-
Alias
-
View
-
Index
-
Sequence
Pregunta 121
Pregunta
The WITH CHECK OPTION clause of the CREATE VIEW statement allows you to do which of the following?
Respuesta
-
Define a view on one or more tables or views
-
Revalidate all invalid objects that are referenced on a view's fullselect
-
Ensure that any inserted or updated rows conform to the definition of the view
-
Define a view that only consists of columns that have check constraints defined
Pregunta 122
Pregunta
Which type of constraint can be used to tell the DB2 Optimizer that a parent-child relationship exists between two tables, but that the relationship is not enforced?
Respuesta
-
Check
-
Unique
-
Referential
-
Informational
Pregunta 123
Pregunta
Which event will NOT cause a trigger to be fired?
Respuesta
-
Execution of an INSERT statement
-
Execution of LOAD REPLACE operation
-
Execution of an INSERT operation of a MERGE statement
-
Execution of an UPDATE operation of a MERGE statement
Pregunta 124
Pregunta
What is the primary purpose for using the INCLUDE clause with a CREATE UNIQUE INDEX statement?
Respuesta
-
To override the limit on index key columns
-
To further enforce the uniqueness of index values
-
To combine two or more indexes to create a single unique index
-
To improve performance of some queries by allowing index-only access
Pregunta 125
Pregunta
What are INSTEAD OF triggers used for?
Respuesta
-
To update data in other tables
-
To perform insert, update and delete operations against complex views
-
To check or modify values before they are actually stored in a database
-
To run non-database operations that are coded in user-defined functions
Pregunta 126
Pregunta
User USER1 wants to store part numbers and part descriptions in a table named PARTS; user
USER1 also wants to ensure that any comparisons of part descriptions that are made will be done so in binary, regardless of the database collating sequence used. Which statement should user USER1
execute to create the desired table?
Respuesta
-
CREATE TABLE parts (part_no INTEGER, desc CLOB))
-
CREATE TABLE parts (part_no INTEGER, desc VARCHAR(200))
-
CREATE TABLE parts (part_no INTEGER, desc CLOB FOR BIT DATA))
-
CREATE TABLE parts (part_no INTEGER, desc VARCHAR(200) FOR BIT DATA)
Pregunta 127
Pregunta
What mechanism is typically used to automatically update other tables, generate or transform values
for inserted or updated rows, and perform tasks such as issuing alerts?
Respuesta
-
Trigger
-
Procedure
-
Table function
-
Scalar function
Pregunta 128
Pregunta
Which data type should be used to store data in a column that represents money and accurately
returns a two position scale?
Respuesta
-
BIGINT
-
BINARY
-
DOUBLE
-
DECIMAL
Pregunta 129
Pregunta
User USER1 wants to define a required relationship between two tables named TAB1 and TAB2 in
such a way that whenever a record is deleted from table TAB1, any related records are deleted from table TAB2. What must user USER1 do to accomplish this?
Respuesta
-
1) Create a primary key on table TAB1; 2) Create a foreign key on table TAB2 that references the primary key on table TAB1 and adheres to the ON DELETE CASCADE rule.
-
Create a primary key on table TAB2; 2) Create a foreign key on table TAB1 that references the primary key on table TAB2 and adheres to the ON DELETE CASCADE rule.
-
1) Create a primary key on table TAB1; 2) Create a foreign key on table TAB2 that references the primary key on table TAB1 and adheres to the ON DELETE RESTRICT rule.
-
1) Create a primary key on table TAB2; 2) Create a foreign key on table TAB1 that references the primary key on table TAB2 and adheres to the ON DELETE RESTRICT rule.
Pregunta 130
Pregunta
Which statement about a deadlock is true?
Respuesta
-
The victim will be rolled back.
-
The victim will read through the lock.
-
Both victim and holder are rolled back.
-
The victim must wait until the holder releases the lock.
Pregunta 131
Pregunta
What takes place when a process accesses a data object on which it already holds a lock, and the
access mode requires a more restrictive lock than the one currently held?
Respuesta
-
Lock wait
-
Lock timeout
-
Lock escalation
-
Lock conversion
Pregunta 132
Pregunta
What is the act of releasing a large number of row-level locks that an application holds on a single
table to acquire a table-level lock known as?
Respuesta
-
Lock exchange
-
Lock promotion
-
Lock escalation
-
Lock conversion
Pregunta 133
Pregunta
When is an INTENT EXCLUSIVE (IX) lock required?
Respuesta
-
When a transaction intends to read or change data.
-
When a transaction intends to change but not read data.
-
When a transaction intends to read but not change data.
-
When a transaction intends to change the system catalog.
Pregunta 134
Pregunta
The EXCLUSIVE MODE option of the LOCK TABLE statement is used to prevent which of the
following?
Respuesta
-
Concurrent application processes from performing any operations on the table.
-
Concurrent application processes from performing any read-only operations on the table.
-
Concurrent applications processes that are running under the cursor stability (CS) isolation level from performing read-only operations on thetable.
-
Concurrent applications processes that are running under the uncommitted read (UR) isolation level from performing read-only operations onthe table.
Pregunta 135
Pregunta
What factor influences lock conversion/promotion?
Respuesta
-
Lock size
-
Number of locks
-
Lock mode needed
-
Available real storage
Pregunta 136
Pregunta
Application APP_A is performing updates to table TAB1 using the read stability (RS) isolation level.
Which isolation level will allow application APP_B to retrieve all rows from table TAB1 immediately, rather than have to wait until application APP_A has finished making updates?
Respuesta
-
Read Stability (RS)
-
Cursor Stability (CS)
-
Repeatable Read (RR)
-
Uncommitted Read (UR)
Pregunta 137
Pregunta
If no isolation level is specified, what is the default isolation level used?
Respuesta
-
Cursor Stability (CS)
-
Repeatable Read (RR)
-
Read Stability (RS) with Currently Committed semantics
-
Cursor Stability (CS) with Currently Committed semantics
Pregunta 138
Pregunta
What isolation level prevents dirty reads, nonrepeatable reads, and phantoms?
Respuesta
-
Read stability (RS)
-
Cursor stability (CS)
-
Repeatable read (RR)
-
Uncommitted read (UR)
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