Which of the following is a type of database backup? MCQ with Answer and Explanation

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Which of the following is a type of database backup?

A. Incremental backup

B. Full backup

C. Differential backup

D. All of the above

Answer: Option D

Solution (By JKSSB Mock Tests)

Full, incremental, and differential backups are common backup strategies.

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

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Question #1

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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. Multi-valued Attribute

B. Complex Attribute

C. Derived Attribute

D. Composite Attribute

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Correct Answer: Option A

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)

Question #2

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Which of the following is a characteristic of the relational model?

A. All of the above

B. Data is accessed via SQL

C. Data is stored in tables

D. Relationships are represented through keys

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Correct Answer: Option A

Explanation:
The relational model organizes data in tables, uses keys for relationships, and is queried using a language like SQL.

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

Question #3

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Who proposed the relational database model based on mathematical relation theory in 1970?

A. Charles Bachman

B. Dennis Ritchie

C. E.F. Codd

D. James Gosling

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Correct Answer: Option C

Explanation:
Dr. Edgar Frank Codd (E.F. Codd) invented the relational model for database management while working for IBM in 1970.

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

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