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Q.

A top-to-bottom relationship among the items in a database is established by a

A

Hierarchical schema

B

Network schema

C

Relational schema

D

All of the above

E

None of the above

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MCQ

1.

Which of the following statements is FALSE concerning file?

A

Files may share the same name or the same extension but not both

B

Every file in the same foldr must have a unique name

C

File extension is another name for file type

D

The file extension comes before the dot (.) followed by the file name

E

None of these

Discussion

MCQ

2.

Database applications are seldom intended for use by a single user.

A

True

B

False

Discussion

MCQ

3.

A logical schema

A

is the entire database.

B

is a standard way of organizing information into accessible parts.

C

describes how data is actually stored on disk.

D

both (A) and (C)

Discussion

MCQ

4.

A top-to-bottom relationship among the items in a database is established by a

A

Hierarchical schema

B

Network schema

C

Relational schema

D

All of the above

E

None of the above

Discussion

MCQ

5.

Data encryption techniques are particularly useful for

A

reducing storage space requirements

B

improving data integrity

C

protecting data in data communication systems

D

All of the above

E

None of the above

Discussion

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