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Welcome to Day 2 of DBMS MCQ Practice Series 🎯 Continuing from Day 1, we dive deeper into Relational Database Concepts with Top 50 Most Important DBMS MCQs focused on Keys, Referential Integrity, and Codd's Rules. These questions are frequently asked and highly expected in upcoming teaching and competitive exams. 📚 Topics Covered (Top 50 MCQs): Keys in Relational Database Superkey Definition & Properties Candidate Key Characteristics Primary Key Constraints Alternate Keys Foreign Keys & References Unique Keys vs Null Values Referential Integrity Referential Integrity Concept CASCADE, RESTRICT, SET NULL Actions Referenced Tables vs Referencing Tables Integrity Constraint Violations Foreign Key Relationships Codd's 12 Rules for Relational Databases Rule 0: The Foundation Rule Rule 1: Information Rule Rule 2: Guaranteed Access Rule 3: Systematic Treatment of NULL Rule 4: Dynamic Online Catalog Rule 5: Comprehensive Data Sublanguage Rule 6: View Updating Rule Rule 7: High-Level Insert, Update, Delete Rule 8: Physical Data Independence Rule 9: Logical Data Independence Rule 10: Integrity Independence Rule 11: Distribution Independence Rule 12: Non-Subversion Rule Relational Database Concepts Attributes & Domains Relations & Tuples Database Schemas Abstraction Levels in Relational Model Candidate Key Selection Cardinality & Degree 🎯 Useful For Exams: ✔ BPSC TRE 4.0 (Computer Science) ✔ CTET / STET ✔ KVS / DSSSB ✔ UP LT Grade ✔ Other Computer Teacher & CS Exams ✔ Technical Interviews (DSA rounds) ✔ B.Tech/MCA Students 📌 This Top 50 MCQ set will strengthen your concept clarity on relational databases and boost your exam accuracy significantly. 💡 KEY HIGHLIGHTS: ✅ Clear explanations for each concept ✅ Real-world examples & scenarios ✅ Common exam mistakes highlighted ✅ Quick revision notes at the end ✅ Solution patterns for similar questions 🔗 Prerequisites: 👉 Watch Day 1: DBMS Top 50 MCQs for database fundamentals - • Day 1 | DBMS Top 50 MCQs 🔥 | Database Basi... 👉 Watch till the end for revision-oriented MCQs. 👉 Like, Share & Subscribe for upcoming Day-wise DBMS MCQ series. 👉 Comment your doubts - we'll create detailed explanation videos! #dbms #dbmsmcq #top50mcq #databasemanagementsystem #relationaldatabases #dbmspreparation #CoddRules #DatabaseKeys #ReferentialIntegrity #dbmsexam #computerscience #bpsctre #tre40 #ctet #stet #KVS #dsssb #upltgrade #computerteacher #teachingexam #mcqpractice #exampreparation #csmcq #dbmsrevision #dbmsconcepts #primarykey #foreignkey #databaseexam #competitiveexam #computermcq #dbmsshorts