Database - ER Model and Business Rules

Why Database ER Model and Business Rules?

In this section you can learn and practice Database Questions based on "ER Model and Business Rules" and improve your skills in order to face the interview, competitive examination and various entrance test (CAT, GATE, GRE, MAT, Bank Exam, Railway Exam etc.) with full confidence.

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Here you can find objective type Database ER Model and Business Rules questions and answers for interview and entrance examination. Multiple choice and true or false type questions are also provided.

How to solve Database ER Model and Business Rules problems?

You can easily solve all kind of Database questions based on ER Model and Business Rules by practicing the objective type exercises given below, also get shortcut methods to solve Database ER Model and Business Rules problems.

Exercise :: ER Model and Business Rules - General Questions

1. 

An action assertion must include which of the following?

A. Anchor object
B. Action
C. Corresponding object
D. All of the above.

Answer: Option D

Explanation:

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

2. 

An oval represents which of the following in an EER?

A. Attribute
B. Entity
C. Optional One
D. Relationship

Answer: Option A

Explanation:

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

3. 

Inheritance is which of the following?

A. When a supertype entity inherits values of the subtype attribute
B. When a subtype entity inherits values of the supertype attribute
C. When a supertype entity inherits values of another supertype attribute
D. When a subtype entity inherits values of another subtype attribute

Answer: Option B

Explanation:

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

4. 

When an entity instance must be a member of only one subtype, it is which of the following?

A. Disjoint with total specialization
B. Disjoint with partial specialization
C. Overlap with total specialization
D. Overlap with partial specialization

Answer: Option A

Explanation:

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

5. 

A supertype/subtype hierarchy is which of the following?

A. Each subtype has only one attribute.
B. Each supertype has only one attribute.
C. Each subtype has only one supertype.
D. Each supertype has only one subtype.

Answer: Option C

Explanation:

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



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