Top 20 DBMS PYQs · Rajasthan, GATE, JVVNL
Computer Science DBMS PYQs RPSC Computer Teacher Rajasthan Informatics Assistant JVVNL GATE DBMS DBMS MCQs

Top 20 DBMS Previous Year Questions for Rajasthan Competitive Exams, GATE & JVVNL (With Answers)

If you're preparing for Rajasthan Computer Teacher, Rajasthan Informatics Assistant, JVVNL, JdVVNL, AVVNL, GATE CSE, NIELIT, or other technical competitive exams, Database Management System (DBMS) is one of the most important subjects to master.

Questions on DBMS basics, SQL, normalization, transactions, database architecture, and keys are frequently asked in these exams. Practicing previous-year and exam-oriented questions is one of the best ways to improve your score.

In this article, you'll find 20 important DBMS MCQs with answers that are based on the patterns commonly seen in Rajasthan government technical exams and GATE.

Q1
What is DBMS?
A. Programming Language B. Operating System C. Database Management Software D. Compiler
Answer: C. Database Management Software
Q2
Which of the following is NOT a DBMS?
A. MySQL B. Oracle C. PostgreSQL D. MS Word
Answer: D. MS Word
Q3
Which language is used to communicate with a DBMS?
A. Java B. C++ C. SQL D. HTML
Answer: C. SQL
Q4
Which of the following is an advantage of DBMS?
A. High Data Redundancy B. Data Independence C. No Security D. No Backup Facility
Answer: B. Data Independence
Q5
Which level of the ANSI-SPARC architecture describes physical storage?
A. External Level B. Conceptual Level C. Internal Level D. Logical Level
Answer: C. Internal Level
Q6
Which type of Data Independence is easier to achieve?
A. Logical Data Independence B. Physical Data Independence C. Both D. None
Answer: B. Physical Data Independence
Q7
What does a Database Schema represent?
A. Current Data B. Database Structure C. Transaction D. Query Result
Answer: B. Database Structure
Q8
What is a Database Instance?
A. Database Design B. Current Database Contents C. Table Name D. Metadata
Answer: B. Current Database Contents
Q9
Who is responsible for Backup and Recovery in DBMS?
A. End User B. Programmer C. Database Administrator (DBA) D. Operator
Answer: C. Database Administrator (DBA)
Q10
Which key uniquely identifies each record in a table?
A. Foreign Key B. Candidate Key C. Primary Key D. Composite Key
Answer: C. Primary Key
Q11
A Foreign Key is primarily used to:
A. Delete Records B. Create Relationships Between Tables C. Sort Records D. Encrypt Data
Answer: B. Create Relationships Between Tables
Q12
Which Normal Form removes Partial Dependency?
A. First Normal Form (1NF) B. Second Normal Form (2NF) C. Third Normal Form (3NF) D. Boyce-Codd Normal Form (BCNF)
Answer: B. Second Normal Form (2NF)
Q13
Which Normal Form removes Transitive Dependency?
A. 1NF B. 2NF C. 3NF D. 4NF
Answer: C. Third Normal Form (3NF)
Q14
What does ACID stand for?
A. Atomicity, Consistency, Isolation, Durability B. Accuracy, Consistency, Integrity, Durability C. Atomicity, Connectivity, Isolation, Data D. None of the Above
Answer: A. Atomicity, Consistency, Isolation, Durability
Q15
Which SQL command removes all rows but keeps the table structure?
A. DELETE B. DROP C. TRUNCATE D. REMOVE
Answer: C. TRUNCATE
Q16
Which SQL command is used to retrieve data?
A. INSERT B. UPDATE C. SELECT D. DELETE
Answer: C. SELECT
Q17
Which SQL clause is used to group records?
A. ORDER BY B. GROUP BY C. WHERE D. HAVING
Answer: B. GROUP BY
Q18
Which JOIN returns only the matching rows from both tables?
A. LEFT JOIN B. RIGHT JOIN C. INNER JOIN D. FULL JOIN
Answer: C. INNER JOIN
Q19
Which locking protocol is commonly used to maintain transaction consistency?
A. Two-Phase Locking (2PL) B. FIFO C. FCFS D. Round Robin
Answer: A. Two-Phase Locking (2PL)
Q20
Which indexing structure is most commonly used in DBMS?
A. Stack B. Queue C. B+ Tree D. Linked List
Answer: C. B+ Tree

Most Frequently Asked DBMS Topics

These topics are repeatedly asked in RPSC Computer Teacher, Rajasthan Informatics Assistant, JVVNL, GATE, NIELIT, and other computer science competitive exams:

DBMS Basics File System vs DBMS Three-Level Architecture Data Independence ER Model Keys (Primary, Foreign, Candidate, Composite) SQL Commands SQL Joins Relational Algebra Functional Dependency Normalization Transactions & ACID Properties Concurrency Control Deadlocks Indexing (B/B+ Trees) Recovery Techniques

Preparation Tips

Learn the basic definitions before moving to advanced topics.
Practice SQL queries regularly.
Revise normalization and functional dependency concepts.
Solve previous-year MCQs to understand the exam pattern.
Focus on conceptual understanding rather than memorizing answers.

Conclusion

DBMS is a high-scoring subject in Rajasthan government technical exams, GATE, JVVNL, and other computer science recruitment exams. Mastering these frequently asked questions will strengthen your fundamentals and improve your performance in objective examinations.

Keep practicing, revise regularly, and solve more mock tests to maximize your score.

Top 20 DBMS PYQs · Rajasthan, GATE, JVVNL · © 2026