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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
Answered: 0 / 15

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