Database - Logical Database Design

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You can easily solve all kind of Database questions based on Logical Database Design by practicing the objective type exercises given below, also get shortcut methods to solve Database Logical Database Design problems.

Exercise :: Logical Database Design - General Questions

1. 

The entity integrity rule states that:

A. no primary key attribute may be null.
B. no primary key can be composite.
C. no primary key may be unique.
D. no primary key may be equal to a value in a foreign key.

Answer: Option A

Explanation:

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

2. 

When mapping a many-to-many unary relationship into a relation which of the following is true?

A. One relation is created.
B. Two relations are created.
C. Three relations are created.
D. Four relations are created.

Answer: Option B

Explanation:

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

3. 

If no multivalued attributes exist and no partial dependencies exist in a relation, then the relation is in what normal form?

A. First normal form
B. Second normal form
C. Third normal form
D. Fourth normal form

Answer: Option B

Explanation:

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

4. 

A foreign key is which of the following?

A. Any attribute
B. The same thing as a primary key
C. An attribute that serves as the primary key of another relation
D. An attribute that serves no purpose

Answer: Option C

Explanation:

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

5. 

A transitive dependency is which of the following?

A. A functional dependency between two or more key attributes.
B. A functional dependency between two or more nonkey attributes.
C. A relation that is in first normal form.
D. A relation that is in second normal form.

Answer: Option B

Explanation:

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