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DBMS Objective Questions and Answers

Practice DBMS objective questions with answers and detailed explanations. Covers normalization, transactions, indexing, SQL, concurrency control, recovery, and query optimization.

This DBMS quiz contains carefully curated objective questions with correct answers and clear explanations. It is designed for computer science students, backend developers, and interview preparation, focusing on database design, SQL internals, transactions, indexing, and performance tuning.

Practice DBMS MCQs with Detailed Explanations

Answer at least 12 questions to submit.

31

Which recovery technique uses shadow paging?

High
32

Which join requires both inputs to be sorted?

Medium
33

Which isolation level prevents phantom reads?

High
34

Which SQL constraint enforces domain integrity?

Medium
35

Which dependency is required for lossless decomposition?

High
36

Which problem occurs in Read Committed isolation?

Medium
37

Which file organization is best for sequential access?

Medium
38

Which SQL feature improves performance of repeated queries?

Medium
39

Which concurrency issue does strict 2PL avoid?

High
40

Which SQL statement permanently removes a table?

Easy
41

Which index supports equality search efficiently?

Medium
42

Which transaction property ensures all-or-nothing execution?

Medium
43

Which join avoids sorting but requires memory?

High
44

Which SQL keyword removes duplicate rows?

Medium
45

Which database component manages metadata?

Medium

Other Objective Questions