The total number of tuples (rows) contained within a relational database table is called its what? MCQ with Answer and Explanation

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The total number of tuples (rows) contained within a relational database table is called its what?

A. Dimension

B. Cardinality

C. Density

D. Degree

Answer: Option B

Solution (By JKSSB Mock Tests)

The number of tuples or rows in a relation is defined as the cardinality of that relation.

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

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Practice More Database Management System (DBMS) Questions

Question #1

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

A. PostgreSQL

B. MySQL

C. MongoDB

D. Oracle

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Correct Answer: Option C

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

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

Question #2

What is a composite key in a database?

A. A key that is made up of multiple columns

B. A key that references another table

C. A key that is always a foreign key

D. A key that is a single column

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Correct Answer: Option A

Explanation:
A composite key is a primary key that consists of two or more columns to uniquely identify a row.

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

Question #3

What is a database transaction?

A. A database schema

B. A query that reads data

C. A backup copy of the database

D. A logical unit of work that consists of one or more SQL statements

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Correct Answer: Option D

Explanation:
A transaction is a sequence of operations performed as a single logical unit, ensuring ACID properties.

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

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