Computer Science - Database Systems

Exercise :: Database Systems - Section 3

36. 

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

Answer: Option C

Explanation:

No answer description available for this question. Let us discuss.

37. 

It is more accurate to define a _____ as a variety of different record types that are treated as a single unit

A. Database
B. Table
C. Record
D. Flat File
E. None of the above

Answer: Option A

Explanation:

No answer description available for this question. Let us discuss.

38. 

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. All of the above
E. None of the above

Answer: Option B

Explanation:

No answer description available for this question. Let us discuss.

39. 

Queries to a database

A. are written in English
B. can use aggregate functions like SUM and COUNT
C. both (a) and (b)
D. All of the above
E. None of the above

Answer: Option B

Explanation:

No answer description available for this question. Let us discuss.

40. 

In order to use a record management system

A. You need to understand the low-level details of how information in stored
B. You need to understand the model the record management system uses.
C. Both (a) and (b)
D. All of the above
E. None of the above

Answer: Option B

Explanation:

No answer description available for this question. Let us discuss.