17454398
Pregunta 1
Pregunta
A DISTINCT must always be user in the top-most SELECT statement of a set operation
Respuesta
- True
- False
Pregunta 2
Pregunta
A parent table referenced by a child table may not be dropped
Respuesta
- True
- False
Pregunta 3
Pregunta
A SELECT statement that is embedded in a clause of another SELECT statement is called
Respuesta
-
Main query
-
Subquery
-
Inner query
-
Outer query
Pregunta 4
Pregunta
A subquery must be enclosed in _________ .
Respuesta
-
Double quotes
-
Single quotes
-
Parantheses
-
Braces
Pregunta 5
Pregunta
A table can be created with or without data
Respuesta
- True
- False
Pregunta 6
Pregunta
Any user can grant or revoke ant type of system privileges to or from another user.
Respuesta
- True
- False
Pregunta 7
Pregunta
Both object and system privileges can be granted through a single role to a user.
Respuesta
- True
- False
Pregunta 8
Pregunta
By default, the foreign key restricts deletes of any parent row that has a corresponding child row(s).
Respuesta
- True
- False
Pregunta 9
Pregunta
Comparison conditions fall into two classes:
Respuesta
-
Single-column operators (>, \=, >\=, <, <>,<\=) and multiple-column operators (IN, ANT, ALL)
-
Single-row operators (>, \=, >\=, <, <>,<\=) and multiple-column operators (IN,ANY,ALL)
-
Single-row operators (>, \=, >\=, <, <>,<\=) and multiple-row operators (IN,ANY,ALL)
-
Multiple-row operators (>, \=, >\=, <, <>,<\=) and single-row operators (IN,ANY,ALL)
Pregunta 10
Pregunta
Consider the EMPLOYEES table. When condition in the WHERE clause limit the employees to IT Programmers with salary greater than 5000?
Respuesta
-
WHERE salary>5000 AND job_id \= 'IT_PROG'
-
WHERE salary>5000 AND job_id \= "IT_PROG"
-
WHERE salary>5000 AND job_id \= IT_PROG
-
WHERE salary>5000 OR job_id \= 'IT_PROG'
Pregunta 11
Pregunta
Consider the EMPLOYEES table. Which condition in the WHERE clause limit the employees to those whose salary is greater than 5000 but less than 18000?
Respuesta
-
WHERE salary > 5000 OR salary < 18000
-
WHERE salary < 5000 AND salary > 18000
-
WHERE salary > 5000 AND salary < 18000
-
WHERE salary >5000 AND salary > 18000
Pregunta 12
Pregunta
Consider the EMPLOYEES table. Which condition in the WHERE clause limit the employees to those whose last name and first name starts with the letter 'K'?
Respuesta
-
WHERE last_name \= 'K%' and first_name \= 'K%'
-
WHERE last_name LIKE 'K_' and first_name LIKE 'K_'
-
WHERE last_name LIKE 'K%' and first_name LIKE 'K%'
-
WHERE last_name and first_name \= 'K%'
Pregunta 13
Pregunta
Consider the EMPLOYEES table. Which condition in the WHERE clause limit the employees to those who do not work in the departments 90 and 60?
Respuesta
-
WHERE department_id \= 90 AND department_id \= 60
-
WHERE department_id IN (90,60)
-
WHERE department_id NOT IN (90,60)
-
WHERE department_id \=90 PR department_id \= 60
Pregunta 14
Pregunta
Consider the EMPLOYEES table. Which condition in the WHERE clause limit the employees to those who work in the department prompted by the user?
Respuesta
-
WHERE department_id \= '%Department'
-
WHERE department_id LIKE '%Department'
-
WHERE department_id \= '&Department'
-
WHERE department_id like '_Department'
Pregunta 15
Pregunta
Consider the EMPLOYEES table. Which of the following statements displays the date in the 'January, 19 1998'?
Respuesta
-
SELECT TO_DATE(hire_date,'fmMONTH, DD YYYY') FROM employees
-
SELECT TO_DATE(hire_date,'fmMON, DD YEAR') FROM employees
-
SELECT TO_CHAR(hire_date,'fmMonth, DD YYYY') FROM employees
-
SELECT TO_DATE(hire_date,'fmMonth, DD YYYY') FROM employees
Pregunta 16
Pregunta
Consider the EMPLOYEES table. Which of the following conditions in the WHERE clause will generate an error?
Respuesta
-
SELECT * FROM employees WHERE last_name\='&Name'
-
SELECT job_id, SUM(salary) FROM employees GROUP BY '&Column'
-
SELECT * FROM &Table
-
SELECT &Column FROM employees
Pregunta 17
Pregunta
Consider the EMPLOYEES table. Which of the following displays the maximum average salary for each department?
Respuesta
-
SELECT MAX(AVG(salary)) FROM employees
-
SELECT department_id, MAX(AVG(salary)) FROM employees GROUP BY department_id
-
SELECT MAX(AVG(salary)) FROM employees GROUP BY department_id
-
SELECT AVG(MAX(salary)) FROM employees GROUP BY department_id
Pregunta 18
Pregunta
Consider the EMPLOYEES table. Which of the following SQL statements is correct to provide the sentence in the format "King has been working since 01.01.1987" with "Employee Information" alias?
Respuesta
-
SELECT last_name ||'has been working since' || hire_date "Employee Information" FROM employees;
-
SELECT last_name || 'has been working since' || hire_date Employee Information FROM employees
-
SELECT last_name || "has been working since" || hire_date "Employee Information" FROM employees;
-
SELECT last_name || 'has been working since' || hire_date 'Employee Information' FROM employees;
Pregunta 19
Pregunta
Consider the EMPLOYEES table. Which of the following statements count the number of employees within each department?
Respuesta
-
SELECT department_id, COUNT(last_name) FROM employees GROUP BY department_id
-
SELECT department_name, COUNT(last_name) FROM employees GROUP BY department_id
-
SELECT department_id, COUNT(last_name) FROM departments GROUP_BY last_name
-
SELECT department_id, department_name, COUNT(last_name) FROM employees GROUP BY department_id
Pregunta 20
Pregunta
Consider the following SQL statement. What will be the result? SELECT e.last_name, e.salary, d.department_name FROM employees e, departments d WHERE e.department_id \= d.department_id
Respuesta
-
An error will occur since none of the JOIN operations is used
-
An error will occur since in the SELECT clause a column thet is used to join the tables is missing
-
The last names of the employees and their salaries will be displayed along with the departments names where the employees work
-
The Cartesian product of the two tables based on the department_id column will be displayed
Pregunta 21
Pregunta
Consider the SQL statement. Which of the following clauses does not sort the result rows by the salary values in the ascending order? SELECT last_name "Employee", salary "Salary" FROM employees
Respuesta
-
ORDER BY salary;
-
ORDER BY 2;
-
ORDER BY "Salary" ASC;
-
ORDER BY Salary DESC;
Pregunta 22
Pregunta
Consider the SQL statement. Which of the following clauses does not sort the result rows by salary value in the ascending order?
SELECT last_name "Employee", salary "Salary"
FROM employees
Respuesta
-
ORDER BY salary;
-
ORDER BY 2;
-
ORDER BY "Salary" ASC;
-
ORDER BY Salary DESC;
Pregunta 23
Pregunta
Delete the zip codes 02199 and 43011 from the ZIPCODE table. Make the change permanent.
Respuesta
-
DELETE FROM zipcode WHERE zip ANY ('02199','43011') COMMIT
-
DELETE FROM zipcode WHERE zip ANY ('02199','43011')
-
DELETE FROM zipcode WHERE zip IN ('02199','43011') COMMIT
-
DELETE FROM zipcode WHERE zip ALL ('02199','43011') COMMIT
Pregunta 24
Pregunta
Constraints always have a name.
Respuesta
- True
- False
Pregunta 25
Pregunta
DML statement such as INSERT, UPDATE, DELETE, and MERGE obtain a lock on the row(s), so other users cannot manipulate it.
Respuesta
- True
- False
Pregunta 26
Pregunta
If there are schemas named USERA and USERB, and both have an EMPLOYEES table, then if USERA wants to access the EMPLOYEES table that belongs to USERB, USERA must write select statement as follows:
Respuesta
-
SELECT * FROM userb.employees;
-
SELECT * FROM employees;
-
SELECT * FROM usera.employees;
-
SELECT * FROM employees.userb;
Pregunta 27
Pregunta
It is possible to combine from two tables that do not have a primary key/foreign key relationship into one result using a set operation.
Respuesta
- True
- False
Pregunta 28
Pregunta
Privileges, roles, and synonyms are all used to implement security in an Oracle Database.
Respuesta
- True
- False
Pregunta 29
Pregunta
Queries containing set operators are called ______ .
Respuesta
-
Compound queries
-
Subqueries
-
Inner queries
-
Outer queries
Pregunta 30
Pregunta
Queries that return more than one row from the inner SELECT statement are called
Respuesta
-
Multiple-row subqueries
-
Multiple-column subqueries
-
Sing-column subqueries
-
Single-row subqueries
Pregunta 31
Pregunta
Queries that return only one row from the inner SELECT statement are called
Respuesta
-
Multiple-column subqueries
-
Single-row subqueries
-
Single-column subqueries
-
Multiple-row subqueries
Pregunta 32
Pregunta
What will be the result of the following SQL statement?
SELECT INITCAP(SUBSTR(CONCAT('Hello',world),4,3)) FROM DUAL;
Respuesta
-
LLO
-
Llo
-
Low
-
LOW
Pregunta 33
Pregunta
What will be the result of the following SQL statement?
SELECT count(d.department_name), l.city
FROM departments d NATURAL JOIN locations l
GROUP BY l.city
Respuesta
-
The number of department in all cities is shown
-
The number of departments in EACH city is shown.
-
An error will occur since the GROUP BY clause cannot be used with NATURAL JOIN
-
The number if departments in one particular city is shown
Pregunta 34
Pregunta
What will be the result of the following query?
SELECT ROUND (63.548, -1) FROM DUAL;
Respuesta
-
64
-
60
-
63
-
70
Pregunta 35
Pregunta
What will be the result of the following SQL statement?
SELECT SUBSTR ('Hello,World!!!',13) FROM DUAL
Respuesta
-
An error will occur, since SUBSTR function need to take 3 parameters
-
Hello,World!!!13
-
!!!
-
Hello, World!
Pregunta 36
Pregunta
The ______ operator compares a value to every value returned by a subquery.
Respuesta
-
NOT
-
ALL
-
SOME
-
ANY
Pregunta 37
Pregunta
The condition INSERT FIRST command evaluates the WHEN condition in order. For all conditions that are true a row is inserted into the appropriate table.
Respuesta
- True
- False
Pregunta 38
Pregunta
The data dictionary view USER_TAB_PRIVS_MADE lists details of table privilege grants performed by the current user.
Respuesta
- True
- False
Pregunta 39
Pregunta
The data of a temporary table is visible to all session.
Respuesta
- True
- False
Pregunta 40
Pregunta
The NUMBER data types is usually the best choice for a primary key.
Respuesta
- True
- False
Pregunta 41
Pregunta
The subquery generally executes ______ , and its output is used to complete the query condition for the main (or ____ ) query.{
Respuesta
-
First, outer
-
Last, outer
-
Last, inner
-
First, inner
Pregunta 42
Pregunta
The TRANCATE command and the TRUNC function can be used interchangeably.
Respuesta
- True
- False
Pregunta 43
Pregunta
The TRUNCATE command removes all data permanently from a table.
Respuesta
- True
- False
Pregunta 44
Pregunta
The UNION and UNION ALL set operator have the opposite effect other.
Respuesta
- True
- False
Pregunta 45
Pregunta
The ____ operator compares a value to EACH value returned by a subquery
Respuesta
-
NOT
-
ANY
-
SOME
-
ALL
Pregunta 46
Pregunta
The ____ operator returns all rows that are selected by either query
Respuesta
-
UNION ALL
-
INTERSECT
-
UNION
-
MINUS
Pregunta 47
Pregunta
The ______ constraint defines a condition that each row must satisfy.
Respuesta
-
PRIMARY KEY
-
CHECK
-
UNIQUE
-
FOREIGN KEY
Pregunta 48
Pregunta
To obtain a list of last names that students and instructors share, you use the MINUS set operator
Respuesta
- True
- False
Pregunta 49
Pregunta
Transaction control determines when data manipulates becomes permanent in a database.
Respuesta
- True
- False
Pregunta 50
Pregunta
Use the _____ operator to return all rows from multiple tables and eliminate any duplicate rows.
Respuesta
-
UNION
-
MINUS
-
UNION ALL
-
INTERSECT
Pregunta 51
Pregunta
What will be the result of the following SQL statement? (SYSDATE is a date of your exam)
SELECT TO_CHAR(SYSDATE, 'Day') FROM Dual;
Respuesta
-
31.05.2013
-
Friday
-
31
-
31-05.2013
Pregunta 52
Pregunta
What will be the result of the following SQL statement? (SYSDATE is a date of your exam)
SELECT TO_CHAR(SYSDATE, 'DD.MM.YY') FROM Dual;{
Respuesta
-
31.May.2013
-
An error will occur
-
31.05.2013
-
31.05.13
Pregunta 53
Pregunta
When executed, this statement cannot be rolled back
Respuesta
-
ALTER TABLE
-
DROP TABLE
-
REMOVE TABLE
-
DELETE TABLE
Pregunta 54
Pregunta
When inserting data into a table form another table, the table names and columns must be the same.
Respuesta
- True
- False
Pregunta 55
Pregunta
When using LIKE condition which symbol is used to denote one character?
Respuesta
-
_
-
+
-
%
-
*
Pregunta 56
Pregunta
When using LIKE conditions which symbol is used to denote zero or many characters?
Respuesta
-
+
-
*
-
%
-
_
Pregunta 57
Pregunta
Which command is used to view the structure of the table LOCATIONS?
Respuesta
-
DESCRIBE LOCATIONS
-
SHOW STRUCTURE LOCATIONS
-
SELECT * FROM LOCATIONS
-
PRINT LOCATIONS
Pregunta 58
Pregunta
Which is right of the following clauses?
Respuesta
-
SELECT... WHERE ... ORDER BY ... GROUP BY
-
SELECT ... FROM ... GROUP BY ... ORDER BY ... WHERE
-
SELECT...FROM...WHERE...GROUP BY...ORDER BY
-
SELECT ... FROM ... WHERE ... ORDER BY ... GROUP BY
Pregunta 59
Pregunta
Which keyword is used to eliminate duplicate rows in the result?
Respuesta
-
DISTINCT
-
DESCRIBE
-
HAVING
-
GROUP BY
Pregunta 60
Pregunta
Which keyword is used to provide an alias to a column?
Respuesta
-
COLUMN
-
AS
-
ALIAS
-
IS
Pregunta 61
Pregunta
Which of the following clauses is used to limit the rows that are retrieved by the query?
Respuesta
-
WHERE
-
ORDER BY
-
FROM
-
GROUP BY
Pregunta 62
Pregunta
Which of the following functions finds the numeric position of a named character?
Respuesta
-
CONCAT
-
INSTR
-
TRIM
-
SUBSTR
Pregunta 63
Pregunta
Which of the following functions is not single-row function?
Respuesta
-
CONCAT
-
SUM
-
UPPER
-
ROUND
Pregunta 64
Pregunta
Which of the following functions joins two strings together?
Respuesta
-
CONCAT
-
TRIM
-
INSTR
-
SUBSTR
Pregunta 65
Pregunta
Which of the following is a concatenation operator?
Respuesta
-
&
-
||
-
*
-
+
Pregunta 66
Pregunta
Which of the following SQL statements will generate an error?
Respuesta
-
SELECT last_name Name FROM employees WHERE Name like 'K%'
-
SELECT last_name Name FROM employees ORDER BY Name
-
SELECT department_id Dep, COUNT(last_name) Num FROM employees GROUP BY department_id HAVING Num>5
-
SELECT department_id Dep, COUNT(last_name) FROM employees GROUP BY dep
Pregunta 67
Pregunta
Which of the following statements about aliases is NOT true?
Respuesta
-
The keyboard AS between an alias and a column name is optional
-
Aliases always require double quotation marks
-
Aliases immediately follows the column name
-
Aliases rename column heading
Pregunta 68
Pregunta
Which of the following statements is NOT true?
Respuesta
-
SQL statements are no case sensitive
-
Keywords cannot be abbreviated
-
SQL statement can be only one line
-
Keywords cannot be split across lines
Pregunta 69
Pregunta
Which statement discards all pending data changes
Respuesta
-
SAVEPOINT
-
COMMIT
-
DISCARD
-
ROLLBACK
Pregunta 70
Pregunta
Which symbol do you use if you need to choose all the columns from the table to the result query?
Respuesta
-
%
-
All
-
+
-
*
Pregunta 71
Pregunta
Which symbol is used to create a substitution variable?{
Respuesta
-
&
-
_
-
%
-
*
Pregunta 72
Pregunta
Write SQL statement for display the department numbers with more than employees in each dept.
Respuesta
-
Select deptno, count(deptno) from emp group by deptno having count(*)>3;
-
Select deptno, count(deptno) from deptno group by emp having count(*)>3;
-
Select deptno, count (emp) from deptno group by emp having count(*)>2;
-
Select deptno, count (deptno) from emp group by deptno having count(*)>2;
Pregunta 73
Pregunta
Write SQL statement for display the names of the employees who are working in the company for the past 5 years:
Respuesta
-
Select ename from emp where hiredate < add_month(sysdate,-60);
-
Select ename from emp where hiredate < add_month(sysdate,-5);
-
Select ename from emp where hiredate < add_month(sysdate,+60);
-
Select ename from emp where hiredate < add_month(sysdate,+5);
Pregunta 74
Pregunta
Write SQL statement for increase salary of all managers by 10%
Respuesta
-
Update emp set sal\=sal*1.1 where empno in (select mgr from emo);
-
Update emp set sal\=sal*0.1 where empno in (select mgr from emo);
-
Update emp set sal\=sal*0.1 where empno in (select emp from emo);
-
Update emp set sal\=sal*1.1 where empno in (select emp from emo);
Pregunta 75
Pregunta
You can add and drop columns from a table using the ALTER TABLE command.
Respuesta
- True
- False
Pregunta 76
Pregunta
You can nor (not?) selectively delete rows a table.
Respuesta
- True
- False
Pregunta 77
Pregunta
You can place the subquery in a number of SQL clauses, including the following:
I. WHERE clause
II. HAVING clause
III. FROM clause
Respuesta
-
I and II
-
I,II and III
-
I only
-
I and III
Pregunta 78
Pregunta
You can update only a single column at a time in a table.
Respuesta
- True
- False
Pregunta 79
Pregunta
You cannot drop a user if objects exist in the user's schema.
Respuesta
- True
- False
Pregunta 80
Pregunta
You cannot order the results of a set operation
Respuesta
- True
- False
Pregunta 81
Pregunta
______ clause can be used and is required in the subquery to perform Top-N analysis.
Respuesta
-
HAVING
-
ORDER BY
-
GROUP BY
-
WHERE
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