answer 27 questions

profilepzftoresc8h5

 

1.   A highly organized collection of data is a database management system.

[removed] True

[removed] False

4 points   

QUESTION 2

1.   Financial data residing in a database is not a corporate resource.

[removed] True

[removed] False

4 points   

QUESTION 3

1.   Modality is the maximum number of entity occurrences involved in a relationship.

[removed] True

[removed] False

4 points   

QUESTION 4

1.   Unary relationships contain one entity type.

[removed] True

[removed] False

4 points   

QUESTION 5

1.   In a database, if there is more than one candidate key one MUST be identified as a primary key.

[removed] True

[removed] False

4 points   

QUESTION 6

1.   A concurrency problem is defined as multiple data sets stored in the database.

[removed] True

[removed] False

4 points   

QUESTION 7

1.   The most significant problem with data redundancy in a database is data integrity.

[removed] True

[removed] False

4 points   

QUESTION 8

1.   Data redundancy can result in requiring unnecessary storage space for the database.

[removed] True

[removed] False

4 points   

QUESTION 9

1.   Many-many relationships should be converted to associative entities on an Entity-Relationship diagram.

[removed] True

[removed] False

4 points   

QUESTION 10

1.   There are two modes of data access known as sequential and direct access.

[removed] True

[removed] False

4 points   

QUESTION 11

1.   Data within a database is typically controlled and manipulated by:

[removed]

A.

MY SQL Workbench

[removed]

B.

Database Management Software

[removed]

C.

MS Word

[removed]

D.

MS Excel

4 points   

QUESTION 12

1.   A unique identifier of an entity is ____

[removed]

A.

Relationship

[removed]

B.

Cardinality

[removed]

C.

Attribute

[removed]

D.

Binary

4 points   

QUESTION 13

1.   In an M-M relationship, the combination of or the association between two entities is known as ____

[removed]

A.

Cardinality

[removed]

B.

Modality

[removed]

C.

Associative entity

[removed]

D.

Intersection data

4 points   

QUESTION 14

1.   A ________ relationship associates occurrences of an entity type with other occurrences of the same entity type.

[removed]

A.

Binary

[removed]

B.

Tertiary

[removed]

C.

Unary

[removed]

D.

Secondary

4 points   

QUESTION 15

1.   How many entity types are involved in a tertiary relationship?

[removed]

A.

1

[removed]

B.

2

[removed]

C.

3

[removed]

D.

4

4 points   

QUESTION 16

1.   The means by which an analyst records, documents, and diagrams the business environment is known as ________.

[removed]

A.

Relationship Identification

[removed]

B.

Data Association

[removed]

C.

Data Analysis

[removed]

D.

Data modeling

4 points   

QUESTION 17

1.   In a DBMS, Referential Integrity contains three rules which are:

[removed]

A.

Restrict

[removed]

B.

Cascade

[removed]

C.

Set-to-null

[removed]

D.

Read

[removed]

E.

All of the above

[removed]

F.

A, B, and C

4 points   

QUESTION 18

1.   The process of arranging attributes of entities in a given business environment into database structures is known as:

[removed]

A.

Physical Database design

[removed]

B.

Database structuring

[removed]

C.

Logical Database design

[removed]

D.

Relationship mapping

4 points   

QUESTION 19

1.   Each row of a database is known as a ______

[removed]

A.

File

[removed]

B.

Field

[removed]

C.

Entity

[removed]

D.

Record

4 points   

QUESTION 20

1.   An entity’s attribute in a database management system is referred to as a ________.

[removed]

A.

Record

[removed]

B.

Relationship

[removed]

C.

Field

[removed]

D.

Row

4 points   

QUESTION 21

1.   A foreign key is defined as _________.

[removed]

A.

The key attribute of an entity

[removed]

B.

An identifier of the relationship

[removed]

C.

Primary key of an entity

[removed]

D.

Primary key of a relation that appears in another relation

4 points   

QUESTION 22

1.   An attribute or field that uniquely appears in every row of the relation is known as ____.

[removed]

A.

Key field

[removed]

B.

Primary Key

[removed]

C.

Foreign Key

[removed]

D.

Intersection ID

4 points   

QUESTION 23

1.   Each table column in a database entity is commonly known as a ____________.

[removed]

A.

Record

[removed]

B.

Relationship

[removed]

C.

Field

[removed]

D.

Primary Key

4 points   

QUESTION 24

1.   The purpose of a database is to _____________.

[removed]

A.

Eliminate redundancy

[removed]

B.

Centralize data

[removed]

C.

Integrate data logically

[removed]

D.

All of the above

[removed]

E.

None of the above

 

 

 

 

 

 

 

QUESTION 1

1.   Describe what is an array. Provide examples and uses in VB & C# languages.

 

 

QUESTION 2

1.   Explain how to derive New Classes from Base Classes. Provide examples and uses in VB & C# languages.

 

QUESTION 3

1.   Describe classes, including constructors, methods, data, value, and reference types. Provide examples and uses in VB & C# languages.

 

 

QUESTION 4

1.   Describe delegate types. Provide examples and uses in VB & C# languages.

 

 

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