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C175 Alternate Practice Test

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Database Foundations
Craig Willey
Quiz por Craig Willey, atualizado more than 1 year ago
Craig Willey
Criado por Craig Willey mais de 5 anos atrás
836
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Resumo de Recurso

Questão 1

Questão
A record consists of a ____
Responda
  • character
  • collection of related records
  • set of one or more field
  • group of files

Questão 2

Questão
A DBMS performs several important functions that guarantee the integrity and consistency of the data in the database. Which of the following is NOT one of those functions?
Responda
  • Data integrity management
  • Data storage management
  • Data reports
  • Security management

Questão 3

Questão
Which item is unstructured data
Responda
  • A record representing one student
  • A video
  • A table that holds student data
  • A relational database that hold course registration data

Questão 4

Questão
Data is/are
Responda
  • information
  • raw facts
  • processed information
  • DBMS

Questão 5

Questão
Which classification is correct for the box marked “Registration” in the given E-R Diagram?
Image:
1 (binary/octet-stream)
Responda
  • Intersection data
  • Modality data
  • Cardinality data
  • Student data

Questão 6

Questão
Which type of relationship exists between Student and Course
Image:
2 (binary/octet-stream)
Responda
  • One-to-many binary
  • Many-to-many binary
  • One-to-many unary
  • Many-to-many unary

Questão 7

Questão
What is the E-R Diagram about an online pet food vendor showing?
Image:
3 (binary/octet-stream)
Responda
  • An Invoice Line can include many Items
  • An item can only be included in one Invoice Line
  • One Invoice Line must include a minimum of one and a maximum of one Item.
  • The relationship between Item and Invoice Line is many-to-many.

Questão 8

Questão
A pet owner can have many pets; a specific pet is linked to one pet owner.
Responda
  • One-to-one
  • One-to-many
  • Many-to-many
  • Associative

Questão 9

Questão
Database models were developed to ____
Responda
  • model real-world events or conditions
  • deposit data within a single file
  • keep data within multiple data repositories
  • allow DBMSs to maintain loose control over the database activities

Questão 10

Questão
What is the correct way to read the modality on the right side of the association?
Image:
4 (binary/octet-stream)
Responda
  • A maximum of one activity
  • A maximum of zero activities
  • A minimum of zero activities
  • A maximum of many activities

Questão 11

Questão
What is the modality of Volunteer?
Image:
5 (binary/octet-stream)
Responda
  • Two or more
  • Two
  • Dependent on registration date
  • At least one

Questão 12

Questão
What type of relationship is expressed with the phrase “A Painter paints one or more Paintings”?
Responda
  • 1:M
  • 1:1
  • M:1
  • M:N

Questão 13

Questão
The entity integrity rule requires that ____
Responda
  • all primary key entries are unique
  • a part of the key may be null
  • foreign key values do not reference primary key values
  • duplicate object values are allowed

Questão 14

Questão
What does the ‘refer’ in referential integrity mean ?
Responda
  • The relationships between entities and attributes, also called referrals
  • Reference points that databases place in each record during backups
  • A foreign key in a table must refer to a valid primary key in another table.
  • You delete a row in one table whose primary key does not have a matching foreign key value in another table

Questão 15

Questão
A table is perceived as a ____
Responda
  • flat structure
  • two-dimensional structure
  • linked structure
  • graph

Questão 16

Questão
Another word for the term “relation” is _____
Responda
  • datafile
  • data index
  • table
  • data query

Questão 17

Questão
DISTINT filters the results to remove duplicates. ORDER BY _____
Responda
  • does the same thing.
  • alters the order of the rows in a table.
  • modifies the presentation by changing the order of the result set.
  • removes duplicates in the table.

Questão 18

Questão
A primary key ____.
Responda
  • is a minimal superkey
  • is always the first field in each table
  • must be numeric
  • must be unique

Questão 19

Questão
A table can be logically connected to another table by defining a ____
Responda
  • hyperlink
  • common attribute
  • primary key
  • logic key

Questão 20

Questão
A relational operator that allows for the combination of information from two or more tables is known as the ____ operator
Responda
  • SELECT
  • PROJECT
  • JOIN
  • DIFFERENCE

Questão 21

Questão
Which of the following statements concerning the primary key is true?
Responda
  • All primary key entries are unique.
  • The primary key may be null.
  • The primary key is not required for all tables.
  • The primary key data do not have to be unique.

Questão 22

Questão
We can describe a link by observing that ____
Responda
  • a primary key of one table appears again as a primary key in a related table
  • a foreign key of one table appears again as a foreign key in a related table
  • a primary key of one table appears again as a foreign key in a related table
  • a foreign key of one table appears again as a primary key in a related table

Questão 23

Questão
When designing a new database, it is a good idea to ____
Responda
  • minimize data redundancy
  • include redundant fields
  • include a common field in all tables
  • use composite keys

Questão 24

Questão
An attribute (or combination of attributes) that uniquely identifies each entity in a table is called a ____
Responda
  • superkey
  • foreign key
  • master key
  • secondary key

Questão 25

Questão
A foreign key must ____.
Responda
  • be numeric
  • be unique
  • be defined in all tables within the database
  • match the value of a primary key in a related table

Questão 26

Questão
The ERD is used to graphically represent the ____ database model.
Responda
  • condensed
  • physical
  • logical
  • conceptual

Questão 27

Questão
A derived attribute ____.
Responda
  • must be stored physically within the database
  • need not be physically stored within the database
  • has many values
  • must be based on the value of three or more attributes

Questão 28

Questão
A relationship is an association between ____
Responda
  • objects
  • entities
  • databases
  • fields

Questão 29

Questão
A ____ key is a key that consists of more than one attribute.
Responda
  • primary
  • foreign
  • composite
  • domain

Questão 30

Questão
A ____ attribute is one that cannot be subdivided.
Responda
  • composite
  • atomic
  • single-valued
  • multivalued

Questão 31

Questão
If an entity can exist apart from one or more related entities, it is said to be ____-independent
Responda
  • existence
  • relationship
  • business
  • weak

Questão 32

Questão
A ____ relationship exists when three entities are associated
Responda
  • unary
  • binary
  • ternary
  • weak

Questão 33

Questão
The set of possible values for an attribute is a ____
Responda
  • domain
  • range
  • set
  • key

Questão 34

Questão
Which attribute(s) make up the primary key in the table definition: CLASS (CRS_CODE, CLASS_SECTION, CLASS_TIME, CLASS_ROOM, PROF_NUM)
Responda
  • CRS_CODE
  • CLASS_SECTION
  • CRS_CODE and CLASS_SECTION
  • There is no primary key

Questão 35

Questão
A table that has all key attributes defined, has no repeating groups, and all its attributes are dependent on the primary key, is said to be in ____
Responda
  • 1NF
  • 2NF
  • 3NF
  • 4NF

Questão 36

Questão
A table that is in 2NF and contains no transitive dependencies is said to be in ____
Responda
  • 1NF
  • 2NF
  • 3NF
  • 4NF

Questão 37

Questão
Data redundancy produces ____
Responda
  • slower lookups
  • robust design
  • efficient storage use
  • data integrity problems

Questão 38

Questão
Normalization works through a series of normal ____
Responda
  • schemas
  • entities
  • databases
  • forms

Questão 39

Questão
Dependencies based on only a part of a composite primary key are called ____ dependencies
Responda
  • primary
  • partial
  • incomplete
  • composite

Questão 40

Questão
Given the table EMP_PROJ (PROJ_NUM, EMP_NUM, PROJ_NAME, EMP_NAME, JOB_CLASS, CHG_HOURS, HOURS), which of the following is a partial dependency?
Responda
  • PROJ_NUM --> PROJ_NAME
  • JOB_CLASS --> CHG_HOUR
  • PROJ_NUM, EMP_NUM --> HOURS
  • PROJ_NUM, EMP_NUM --> CHG_HOURS

Questão 41

Questão
A relation is not in 1NF if
Responda
  • it has multiple candidate keys
  • all of the key attributes are defined
  • there are repeating groups in the table
  • all attributes are dependent on the primary key

Questão 42

Questão
The SQL command that lets you insert data into a table, one row at a time, is ____
Responda
  • INSERT
  • SELECT
  • COMMIT
  • UPDATE

Questão 43

Questão
The SQL command that enables you to make changes in the data is ____
Responda
  • INSERT
  • SELECT
  • COMMIT
  • UPDATE

Questão 44

Questão
To list all the contents of the PRODUCT table, you would use ____.
Responda
  • LIST * FROM PRODUCT;
  • SELECT * FROM PRODUCT;
  • DISPLAY * FROM PRODUCT;
  • SELECT ALL FROM PRODUCT;

Questão 45

Questão
Which command would you use when making corrections to the PRODUCT table?
Responda
  • CHANGE PRODUCT SET P_INDATE = '01/18/2004' WHERE P_CODE = '13-Q2/P2';
  • ROLLBACK PRODUCT SET P_INDATE = '01/18/2004' WHERE P_CODE = '13-Q2/P2';
  • EDIT PRODUCT SET P_INDATE = '01/18/2004' WHERE P_CODE = '13-Q2/P2';
  • UPDATE PRODUCT SET P_INDATE = '01/18/2004' WHERE P_CODE = '13-Q2/P2';

Questão 46

Questão
Which command would be used to delete the table row where the P_Code = '2238/QPD'?
Responda
  • DELETE FROM PRODUCT WHERE P_CODE = '2238/QPD';
  • REMOVE FROM PRODUCT WHERE P_CODE = '2238/QPD'
  • ERASE FROM PRODUCT WHERE P_CODE = '2238/QPD';
  • ROLLBACK FROM PRODUCT WHERE P_CODE = '2238/QPD';

Questão 47

Questão
Which command is used to select partial table contents?
Responda
  • SELECT <column(s)> FROM <Table name> WHERE <Item>;
  • LIST <column(s)> FROM <Table name> WHERE <Conditions>;
  • SELECT <column(s)> FROM <Table name> WHERE <Conditions>;
  • LIST<column(s)> FROM <Table name> WHERE <Item>;

Questão 48

Questão
Which query will output the table contents when the value of V_CODE is less than or equal to 21344?
Responda
  • SELECT P_DESCRIPT, P_INDATE, P_PRICE, V_CODE FROM PRODUCT WHERE V_CODE <> 21344;
  • SELECT P_DESCRIPT, P_INDATE, P_PRICE, V_CODE FROM PRODUCT WHERE V_CODE <=21344;
  • SELECT P_DESCRIPT, P_INDATE, P_PRICE, V_CODE FROM PRODUCT WHERE V_CODE => 21344;
  • SELECT P_DESCRIPT, P_INDATE, P_PRICE, V_CODE FROM PRODUCT WHERE V_CODE = 21344;

Questão 49

Questão
Which query will list all the rows in which the inventory stock dates occur on or after January 20, 2006?
Responda
  • SELECT P_DESCRIPT, P_QOH, P_MIN, P_PRICE, P_INDATE FROM PRODUCT WHERE P_INDICATE >= '01/20/2006'
  • SELECT P_DESCRIPT, P_QOH, P_MIN, P_PRICE, P_INDATE FROM PRODUCT WHERE P_INDICATE >= #01/20/2004#
  • SELECT P_DESCRIPT, P_QOH, P_MIN, P_PRICE, P_INDATE FROM PRODUCT WHERE P_INDICATE >= '20-JAN-2004'
  • SELECT P_DESCRIPT, P_QOH, P_MIN, P_PRICE, P_INDATE FROM PRODUCT WHERE P_INDICATE >= {01-20-2004}

Questão 50

Questão
What is the SQL syntax requirement to list the table contents for either V_CODE = 21344 or V_CODE = 24288?
Responda
  • SELECT P_DESCRIPT, P_INDATE, P_PRICE, V_CODE FROM PRODUCT WHERE V_CODE = 21344 OR V_CODE <= 24288
  • SELECT P_DESCRIPT, P_INDATE, P_PRICE, V_CODE FROM PRODUCT WHERE V_CODE = 21344 OR V_CODE => 24288
  • SELECT P_DESCRIPT, P_INDATE, P_PRICE, V_CODE FROM PRODUCT WHERE V_CODE = 21344 OR V_CODE > 24288
  • SELECT P_DESCRIPT, P_INDATE, P_PRICE, V_CODE FROM PRODUCT WHERE V_CODE = 21344 OR V_CODE = 24288

Questão 51

Questão
What is the command to join the P_DESCRIPT and P_PRICE fields from the PRODUCT table and the V_NAME, V_AREACODE, V_PHONE, and V_CONTACT fields from the VENDOR table where the value of V_CODE match?
Responda
  • SELECT P_DESCRIPT, P_PRICE, V_NAME, V_CONTACT, V_AREACODE, V_PHONE FROM PRODUCT, VENDOR WHERE PRODUCT.V_CODE <> VENDOR.V_CODE;
  • SELECT P_DESCRIPT, P_PRICE, V_NAME, V_CONTACT, V_AREACODE, V_PHONE FROM PRODUCT, VENDOR WHERE PRODUCT.V_CODE = VENDOR.V_CODE
  • SELECT P_DESCRIPT, P_PRICE, V_NAME, V_CONTACT, V_AREACODE, V_PHONE FROM PRODUCT, VENDOR WHERE PRODUCT.V_CODE <= VENDOR.V_CODE;
  • SELECT P_DESCRIPT, P_PRICE, V_NAME, V_CONTACT, V_AREACODE, V_PHONE FROM PRODUCT, VENDOR WHERE PRODUCT.V_CODE => VENDOR.V_CODE;

Questão 52

Questão
SQL allows the use of special operators in conjunction with the WHERE clause. A special operator used to check for similar character strings is ____.
Responda
  • BETWEEN
  • IS NULL
  • LIKE
  • IN

Questão 53

Questão
A table can be deleted from the database by using the ____ command.
Responda
  • DROP
  • DELETE
  • MODIFY
  • ERASE

Questão 54

Questão
UPDATE tablename ***** [WHERE conditionlist]; What command replaces the ***** in the above statement?
Responda
  • SET columnname = expression
  • columnname = expression
  • expression = columnname
  • LET columnname = expression

Questão 55

Questão
A ____ join returns rows with matching values and includes all rows from both tables (T1 and T2) with unmatched values.
Responda
  • natural
  • cross
  • full outer
  • left outer

Questão 56

Questão
During which step in the extract, transform, load (ETL) process are raw data sets aggregated?
Responda
  • Transformation
  • Extraction
  • Loading
  • Denormalization

Questão 57

Questão
Which is an important issue associated with the loading component of extract, transform, load (ETL)?
Responda
  • Mapping keys from one system to another
  • Monitor refreshing volume and frequency
  • Determining the content of the data
  • Denormalizing and renormalizing data

Questão 58

Questão
A database includes the table shown above in the exhibit. Each teacher is associated with exactly one campus. The address in the table is the address for the campus where the teacher teaches. What change would you need to make to normalize the database to the third normal form (3NF)?
Image:
1 (binary/octet-stream)
Responda
  • Combine the FirstName and LastName columns into a single column.
  • Combine the Campus, Address, City, State, Country, and PostalCode columns into a single column.
  • Create a separate table for campus address information. Use the Campus as the primary key. Add a TeacherID column to the table and relate it to the Teacher ID column in the Teachers table.
  • Create a separate table for campus address information. Use Campus as the primary key for the table. Create a foreign key in the Teachers table that relates teacher to the campus.

Questão 59

Questão
Which statement will remove all rows from the Materials table that have a Status value of ‘Obsolete’ but do not have a value for the VendorID column?
Responda
  • DELETE Materials WHERE Status = ‘Obsolete’ OR VendorID IS NULL
  • DELETE FROM Materials WHERE Status = ‘Obsolete’ AND VendorID IS NULL
  • DELETE MaterialID, Description, Status, VendorID FROM Materials WHERE Status = ‘Obsolete’ AND VendorID IS NULL
  • DELETE FROM Materials WHERE Status = ‘Obsolete’ WHERE VendorID IS NULL

Questão 60

Questão
The TestScores table is shown in the exhibit and has these characteristics: Each student has a unique StudentID that references the Students table. A specific test can be taken more than once. Each instructor has a unique InstructorID that references the Instructors table Each student may take multiple tests on the same date. Each student may take tests on multiple dates. What column or columns should you use for the primary key?
Image:
2 (binary/octet-stream)
Responda
  • StudentID, Date
  • StudentID, Test, Date, InstructorID
  • StudentID, Test, and Date
  • Test

Questão 61

Questão
You are creating a relational database to store information about instructors and the courses that each instructor teaches. Each course is taught by a single instructor. You have created an Instructor table and a Course table as shown above. You need to create a relationship between the Instructor table and the Course table. You need to keep duplicate data to a minimum. What should you do?
Image:
3 (binary/octet-stream)
Responda
  • Create a new column in the Instructor table.
  • Create new columns in the Instructors table for each course taught
  • Create a new table that includes two columns.
  • Create a new column in the Course table

Questão 62

Questão
Which of the following is structured data?
Responda
  • Images
  • Email Attachments
  • Records in a database
  • Audio/Video

Questão 63

Questão
Which kind of relationship does the diagram depict?
Image:
4 (binary/octet-stream)
Responda
  • Unary one-to-many
  • Binary many-to-many
  • Unary many-to-many
  • Binary one-to-many

Questão 64

Questão
Which kind of relationship does the diagram depict?
Image:
5 (binary/octet-stream)
Responda
  • Unary one-to-many
  • Binary many-to-many
  • Unary one-to-one
  • Binary one-to-many

Questão 65

Questão
What is the modality of appointment?
Image:
6 (binary/octet-stream)
Responda
  • At least one
  • Dependent on the quantity
  • Two
  • Two or more

Questão 66

Questão
What form is this table in?
Image:
7 (binary/octet-stream)
Responda
  • Unnormalized
  • First normal form
  • Second normal form
  • Third normal form

Questão 67

Questão
What form is this table in?
Image:
1 (binary/octet-stream)
Responda
  • Unnormalized
  • First normal form
  • Second normal form
  • Third normal form

Questão 68

Questão
What form is this table in?
Image:
2 (binary/octet-stream)
Responda
  • Unnormalized
  • First normal form
  • Second normal form
  • Third normal form

Questão 69

Questão
What form is this table in?
Image:
3 (binary/octet-stream)
Responda
  • Unnormalized
  • First normal form
  • Second normal form
  • Third normal form

Questão 70

Questão
Affinity grouping question – Where does affinity grouping occur in data mining?
Responda
  • Between objects
  • Among clusters
  • Among entities and target applications
  • Between entity group names

Questão 71

Questão
How is prediction distinguished from estimation in data mining?
Responda
  • Estimation assumptions do not need to be tested.
  • Prediction is used to look at historical data only.
  • Estimation divides small collections of entities into smaller groups of similar entities.
  • Prediction classifies objects according to an expected future behavior.

Questão 72

Questão
During which step in the extract, transform, load (ETL) process are raw data sets aggregated?
Responda
  • Conversion
  • Loading
  • Extraction
  • Transformation
  • Denormalization

Questão 73

Questão
Which issues is focused on the loading component of extract, transform, load (ETL)?
Responda
  • Monitor refreshing volume and frequency
  • Mapping keys from one system to another
  • Determining the content of the data
  • Denormalizaing and renormalizing the data

Questão 74

Questão
How can a data warehouse assist in an organization’s data analysis?
Responda
  • By serving as the primary source of information that feeds analytical processing
  • By storing data that is no longer in use but may be needed for future analyses
  • By providing a place where unnormalized data can reside before it is processed
  • By providing a physical space where groups of servers can process data on a large scale

Questão 75

Questão
Which set of results should a company expect from implementing a business intelligence system?
Responda
  • Reduced hardware redundancy and decreased workloads
  • Riskier capital and asset investments and increased throughput
  • Increased profitability and reduced hardware redundancy
  • Increased profitability and increased throughput.

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