Uploaded July 2026 | Updated September 2026, 2 weeks ago

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🔹Notes: gatesmashers.com/resources/dbms-interview-questions

00:00 Q-1: Difference Between DBMS and Traditional File System
03:15 Q-2: What is Data Independence?
05:16 Q-3: Schema vs Database Instance
06:16 Q-4: Primary Key vs Candidate Key
07:54 Q-5: What is Referential Integrity?
09:38 Q-6: Modeling Students, Courses and Enrollments
11:33 Q-7: Why Use an Associative Entity for Many-to-Many Relationships?
11:35 Q-8: Insertion, Update and Deletion Anomalies
14:58 Q-9: When is Normalization Required?
15:54 Q-10: Third Normal Form (3NF) vs BCNF
17:00 Q-11: When is Denormalization Better Than Normalization?
18:51 Q-12: ACID Properties in DBMS
20:26 Q-13: Concurrency Problem – Lost Update
22:31 Q-14: Serial Schedule vs Serializable Schedule
24:12 Q-15: Dirty Read and Isolation Levels
55:46 Q-16: Non-Repeatable Read
27:12 Q-17: Deadlock in DBMS and Deadlock Detection
28:56 Q-18: Two-Phase Locking (2PL) and Serializability
30:11 Q-19: MVCC vs Strict Lock-Based Execution
32:26 Q-20: Indexing for Slow Queries
33:51 Q-21: Why are B+ Trees Used for Database Indexes?
35:46 Q-22: Clustered vs Non-Clustered Indexing
38:06 Q-23: Why Too Many Indexes Reduce Performance
39:11 Q-24: Log-Based Recovery After a Crash
42:28 Q-25: Write-Ahead Logging (WAL)

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