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GATE CS - Databases (DBMS)
Practice ER model, normalization, SQL queries, transactions, and indexing
50 questions•5 pages•~75 min
Use this quiz track to strengthen recall, speed, and exam-style decision making. Attempt one page first, review explanations, and then re-attempt incorrect questions without notes.
A good scoring strategy is to mark uncertain questions, finish known ones quickly, and return with elimination logic. This improves accuracy while keeping momentum under time constraints.
Progress: 0 / 500%
Page 3 of 5 • Questions 21-30 of 50
Q21easy
What is a superkey?
Q22easy
What is the main purpose of the GROUP BY clause?
Q23medium
What is the main difference between DELETE and TRUNCATE?
Q24medium
What is the main purpose of the EXISTS operator?
Q25medium
What is the main advantage of BCNF over 3NF?
Q26easy
What is the main purpose of the DISTINCT keyword?
Q27easy
What is a deadlock in database systems?
Q28easy
What is the main purpose of the UNION operator?
Q29easy
What is the main difference between WHERE and HAVING?
Q30easy