What is the main purpose of indexing in a database? MCQ with Answer and Explanation

What is the main purpose of indexing in a database?
A. To backup data
B. To encrypt data
C. To speed up data retrieval
D. To delete data
Answer: Option C
Solution (By JKExamLibrary)
Indexes improve the speed of data retrieval operations on a database table.

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

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Practice More Database Management System (DBMS) Questions

Question #1 Report Error
The process of organizing a relational database schema to minimize data redundancy and prevent update anomalies is called what?
A. Aggregation
B. Generalization
C. Denormalization
D. Normalization

Correct Answer: Option D


Explanation:
Normalization is the systematic process of structuring relational database schemas to eliminate redundant data and maintain data integrity through decomposition.

This question belongs to: Computer Database Management System (DBMS)
Question #2 Report Error
Which of the following is not an aggregate function in SQL?
A. AVG
B. SUM
C. DESC
D. MAX

Correct Answer: Option C


Explanation:
DESC is a keyword for sorting order, not an aggregate function.

This question belongs to: Computer Database Management System (DBMS)
Question #3 Report Error
Which SQL keyword is used within a SELECT query to filter records matching a specified pattern using wildcards?
A. EXISTS
B. IN
C. LIKE
D. BETWEEN

Correct Answer: Option C


Explanation:
The LIKE operator is specifically used in a WHERE clause to perform pattern matching on string columns using wildcards (% and _).

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