RDBMS is based on which model? MCQ with Answer and Explanation

Question
RDBMS is based on which model?
A. Object-oriented model
B. Relational model
C. Hierarchical model
D. Network model
Answer: Option B
Solution (By JKSSB Mock Tests)
Relational Database Management System (RDBMS) is based on the relational model proposed by E.F. Codd.
This question belongs to: Computer Database Management System (DBMS)
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Practice More Database Management System (DBMS) Questions

Question #1
What does the EXISTS operator do in SQL?
A. Compares two values
B. Performs arithmetic
C. Checks if a value is null
D. Tests for the existence of rows returned by a subquery
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Correct Answer: Option D

Explanation:
EXISTS returns TRUE if the subquery returns at least one row, otherwise FALSE.
This question belongs to: Computer Database Management System (DBMS)
Question #2
Which of the following is a TCL (Transaction Control Language) command?
A. CREATE
B. SELECT
C. SAVEPOINT
D. DROP
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Correct Answer: Option C

Explanation:
Transaction Control Language includes COMMIT, ROLLBACK, and SAVEPOINT.
This question belongs to: Computer Database Management System (DBMS)
Question #3
How many fundamental rules did E.F. Codd define to determine whether a database system qualifies as a true relational database management system?
A. 10 rules
B. 14 rules
C. 8 rules
D. 12 rules
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Correct Answer: Option D

Explanation:
E.F. Codd formulated 12 rules (numbered 0 to 11, often called Codd's 12 Rules) to evaluate relational database management systems.
This question belongs to: Computer Database Management System (DBMS)
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