What is a data mart? MCQ with Answer and Explanation

Question
What is a data mart?
A. A backup technique
B. A query language
C. A type of database
D. A subset of a data warehouse focused on a specific business unit or function
Answer: Option D
Solution (By JKSSB Mock Tests)
A data mart is a specialized data warehouse for a specific department, team, or subject area.
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 a type of database backup?
A. Differential backup
B. All of the above
C. Incremental backup
D. Full backup
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Correct Answer: Option B

Explanation:
Full, incremental, and differential backups are common backup strategies.
This question belongs to: Computer Database Management System (DBMS)
Question #2
Which type of JOIN combines all rows from the left table and all rows from the right table, filling in NULLs wherever a match is missing on either side?
A. Cross Join
B. Inner Join
C. Natural Join
D. Full Outer Join
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Correct Answer: Option D

Explanation:
A Full Outer Join combines the behavior of both Left and Right Outer Joins, returning all rows from both tables and applying NULL values where matches do not exist.
This question belongs to: Computer Database Management System (DBMS)
Question #3
What does ACID stand for in database transactions?
A. All Correct Information Display
B. Atomicity, Consistency, Isolation, Durability
C. Accuracy, Control, Integrity, Data
D. Access, Create, Insert, Delete
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Correct Answer: Option B

Explanation:
ACID properties ensure reliable transaction processing in DBMS.
This question belongs to: Computer Database Management System (DBMS)
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