Which of the following is an example of a relational database management system (RDBMS)? MCQ with Answer and Explanation

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Which of the following is an example of a relational database management system (RDBMS)?

A. Redis

B. Oracle Database

C. Cassandra

D. MongoDB

Answer: Option B

Solution (By JKSSB Mock Tests)

Oracle Database is a well-known RDBMS. MongoDB, Redis, and Cassandra are NoSQL databases.

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

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Practice More Database Management System (DBMS) Questions

Question #1

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The actual collection of data tuples stored in a table at any specific point in time is called a what?

A. Relation Instance

B. Relation Schema

C. Relation Degree

D. Relation Domain

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Correct Answer: Option A

Explanation:
A Relation Instance is the specific collection of data rows (tuples) present in a table at a given moment. It changes frequently as data is modified.

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

Question #2

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Which condition-tester returns TRUE if a subquery returns one or more records, and FALSE if the subquery returns no rows?

A. IN

B. EXISTS

C. ANY

D. ALL

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Correct Answer: Option B

Explanation:
The EXISTS operator is used to test for the presence of any records in a subquery, returning TRUE as soon as a single matching row is encountered.

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