Which of the following is an example of a NoSQL database? MCQ with Answer and Explanation

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Which of the following is an example of a NoSQL database?

A. MongoDB

B. Oracle

C. MySQL

D. PostgreSQL

Answer: Option A

Solution (By JKSSB Mock Tests)

MongoDB is a document-oriented NoSQL database. PostgreSQL, MySQL, and Oracle are RDBMS.

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

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Question #1

In SQL, what is the purpose of the LIKE operator?

A. To perform pattern matching on strings

B. To perform arithmetic operations

C. To aggregate data

D. To join tables

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Correct Answer: Option A

Explanation:
LIKE is used with wildcards (% and _) to search for a specified pattern in a column.

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

Question #2

What is a virtual table that does not physically exist on storage but is defined by an underlying SQL query called?

A. Stored Procedure

B. Trigger

C. Index

D. View

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Correct Answer: Option D

Explanation:
A View is a virtual, logical table derived from the result set of an SQL SELECT query. It behaves like a table but does not store data independently.

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

Question #3

What is the purpose of the SQL 'ORDER BY' clause?

A. To group rows

B. To filter rows

C. To sort the result set

D. To join tables

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Correct Answer: Option C

Explanation:
ORDER BY sorts the query results in ascending or descending order based on specified columns.

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

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