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. Oracle

B. PostgreSQL

C. MongoDB

D. MySQL

Answer: Option C

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

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An attribute that can be broken down into smaller, independent sub-parts with independent meanings (such as Name into First_Name and Last_Name) is called a what?

A. Derived Attribute

B. Composite Attribute

C. Simple Attribute

D. Multi-valued Attribute

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Correct Answer: Option B

Explanation:
A Composite Attribute is one that can be divided into smaller sub-components or meaningful independent fields.

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

Question #2

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What is an attribute called when it can hold more than one value for a single entity instance, such as multiple phone numbers for a person?

A. Composite Attribute

B. Derived Attribute

C. Multi-valued Attribute

D. Complex Attribute

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Correct Answer: Option C

Explanation:
A Multi-valued Attribute is an attribute that can store multiple distinct values for a single entity instance (e.g., skill_set, phone_numbers).

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