DBMS Top 30 PYQs & Complete Revision | Bihar STET Paper 2 CS

DBMS Top 30 MCQs & Complete Revision in Hindi | Bihar STET & BPSC CS Paper 2 Welcome to ExamEdge! In this video, we cover 30 most important DBMS MCQs covering DBMS Architecture, ER Model, Keys, Normalization (1NF to BCNF), SQL Commands, Joins, Transactions, ACID Properties, and Concurrency Control. Each question is explained step-by-step with diagrams, concept breakdowns, and rapid memory-hook revisions for Bihar STET CS Paper 2, BPSC TRE 4.0, GATE CS, UGC NET, and PGT Computer Science exams! ⏱️ TIMESTAMPS / CHAPTERS 0:00 - Intro & 8 Major DBMS Exam Areas 0:50 - Q1: 3-Schema Architecture (Physical Storage Level) 1:58 - Q2: Data Independence (Logical vs Physical) 3:13 - Q3: ER Diagram Symbols (Weak Entity) 3:59 - Q4: Primary Key Attributes in ER Model 4:46 - Q5: Relational Model Basics (What is a Tuple?) 5:29 - Q6: Degree and Cardinality Calculations 6:11 - Q7: Super Key vs Candidate Key Differences 6:58 - Q8: Foreign Key & Referential Integrity Constraint 7:47 - Q9: Prime Attributes Identification 8:30 - Q10: ON DELETE CASCADE Functionality 9:13 - Q11: Super Key Formal Definition 10:00 - Q12: 1NF & Atomic Values Rule 10:41 - Q13: 2NF & Partial Dependency Removal 11:11 - Q14: 3NF & Transitive Dependency Removal 11:49 - Q15: BCNF Rules & Determinants 12:32 - Q16: How to Find the Highest Normal Form 13:38 - Q17: 4NF & Multivalued Dependency 14:07 - Q18: ALTER Command & Table Structure Modification 14:41 - Q19: DELETE vs TRUNCATE vs DROP Differences 15:27 - Q20: HAVING Clause vs WHERE Clause 16:06 - Q21: SQL Execution Order Explained 16:55 - Q22: Cartesian Product Row Calculations 17:32 - Q23: LEFT OUTER JOIN Output Behavior 18:09 - Q24: SQL LIKE Pattern Matching ('_a%') 18:51 - Q25: ACID Properties: Atomicity (All or Nothing) 19:54 - Q26: Isolation & Concurrency Control Protocols 20:41 - Q27: Dirty Read Problem Explained 21:18 - Q28: Strict 2PL Protocol & Exclusive Locks 21:58 - Q29: Conflict Serializability & Precedence Graph 22:37 - Q30: Deferred Update Technique 23:26 - Rapid Revision: 30 DBMS One-Liners 26:03 - Outro & Final Exam Tips 💡 WHAT YOU WILL LEARN IN THIS VIDEO: DBMS 3-Schema Architecture & Relational Model Fundamentals Normalization (1NF, 2NF, 3NF, BCNF, 4NF) Shortcut Tricks SQL Commands execution order & JOIN operations Transactions, ACID Properties, 2PL, and Concurrency Control 30 Solved High-Yield MCQs with Detailed Solutions 📚 USEFUL FOR EXAMS: Bihar STET Computer Science Paper 2 BPSC TRE 4.0 Computer Teacher Exam UGC NET CS / GATE CS / NIELIT KVS, NVS & EMRS PGT Computer Science ▶️ PLAYLIST: Complete Computer Science Preparation:    • Bihar STET Computer Science   Drop your score out of 30 in the comments below! If you found this video helpful, please LIKE, SHARE, and SUBSCRIBE to ExamEdge for visual CS preparation. #DBMS #BiharSTET #ComputerScience #BPSCTRE #DBMSMCQ #SQL #Normalization #ExamEdge #stetpaper2 Related Videos: Bihar STET 2026 Computer Science | Syllabus, Eligibility & Exam Pattern Update BPSC TRE 4.0 Computer Science Aarambh Series BPSC TRE 4.0 Detailed Computer Science Syllabus | BPSC TRE - 4.0 की कैसे करे तैयारी....?