What is the purpose of a database index? MCQ with Answer and Explanation

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What is the purpose of a database index?

A. To enforce uniqueness

B. To define relationships

C. To speed up data retrieval operations

D. To store large objects

Answer: Option C

Solution (By JKExamLibrary)

Indexes are primarily used to improve the speed of data retrieval, particularly for search queries.

This question belongs to: Computer Database Management System (DBMS)

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Question #1 Report Error

What is the purpose of an index in a database?

A. To enforce foreign key constraints

B. To compress data

C. To speed up data retrieval operations

D. To encrypt data

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Correct Answer: Option C

Explanation:
Indexes are used to improve the speed of data retrieval queries, at the cost of additional storage and maintenance overhead.

This question belongs to: Computer Database Management System (DBMS)

Question #2 Report Error

What is metadata?

A. Data about data

B. User data

C. Temporary data

D. Backup data

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Correct Answer: Option A

Explanation:
Metadata is data that provides information about other data, such as structure and constraints.

This question belongs to: Computer Database Management System (DBMS)

Question #3 Report Error

Which data model uses objects, classes, and inheritance features, mirroring concepts from object-oriented programming?

A. Object-Oriented Data Model

B. Flat Data Model

C. Network Data Model

D. Relational Data Model

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Correct Answer: Option A

Explanation:
The Object-Oriented Data Model integrates object-oriented programming languages directly with databases, storing data as objects with attributes and methods.

This question belongs to: Computer Database Management System (DBMS)

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