Physical Database Design – General Questions

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  • / Author: GkFeed Team

1. If a denormalization situation exists with a one-to-one binary relationship, which of the following is true?

A. All fields are stored in one relation.
B. All fields are stored in two relations.
C. All fields are stored in three relations.
D. All fields are stored in four relations.

Correct Answer:  A. All fields are stored in one relation.

2. Selecting a data type involves which of the following?

A. Maximize storage space
B. Represent most values
C. Improve data integrity
D. All of the above.

Correct Answer:  C. Improve data integrity

3. What is the best data type definition for Oracle when a field is alphanumeric and has a length that can vary?

A. VARCHAR2
B. CHAR
C. LONG
D. NUMBER

Correct Answer:  A. VARCHAR2

4. If a denormalization situation exists with a many-to-many or associative binary relationship, which of the following is true?

A. All fields are stored in one relation.
B. All fields are stored in two relations.
C. All fields are stored in three relations.
D. All fields are stored in four relations.

Correct Answer:  B. All fields are stored in two relations.

5. Which of the following is an advantage of partitioning?

A. Complexity
B. Inconsistent access speed
C. Extra space
D. Security

Correct Answer:  D. Security
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