Understanding Soundness and Completeness of Armstrong’s Axioms Question: For a set of functional dependencies (FDs) F, FAA represents the set of FDs derived using Armstrong’s Axioms, and F+ represents the closure of F. Considering the following statements: S1: FAA ⊆ …
SQL Query Analysis with Schema Schema: student(rollNo, name, degree, year, sex, deptNo, advisor): deptNo: Foreign key referencing deptId in the department relation. advisor: Foreign key referencing empId in the professor relation. department(deptId, name, hod, phone): hod: Foreign key referencing empId …
Question In a relational database, if A is a foreign key in relation R that references the primary key B in relation S, and X represents the set of non-null values in A, while Y is the set of all …
C Programming Reference Operator Precedence Table Operator Description Associativity () [] -> . Function call, array subscripting, member access Left to Right ++ — + – ~ ! Increment, decrement, unary plus, minus, bitwise NOT, logical NOT Right …
Understanding ER Diagrams and Relational Mapping in DBMS Question: Which of the following statements is true about the above ER diagram? The minimum number of relations required for the above ER diagram is 2. Attribute C will be present as …
Conflict and View Serializability in DBMS – Practice Question Question: Which of the following are true? A: All view serializable schedules are conflict serializable as well. B: All conflict serializable schedules are view serializable as well. C: If a …
Conflict Serializability: Detailed Explanation with Example Question: Consider the following schedule: S₁: R₁(A); R₁(C); R₂(B); W₂(B); R₃(B); R₁(A); R₃(C); W₃(C); W₁(A) S₂: R₂(A); R₁(C); R₂(B); R₃(B); W₂(B); R₁(A); R₃(C); W₃(C); W₁(A) Which of the above schedules is conflict serializable? …
Q1: What are the potential problems when a DBMS executes multiple transactions concurrently? Question: What are the potential problems when a DBMS executes multiple transactions concurrently? Phantom problem The dirty read problem Unrepeatable read problem All of the above Answer: …
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Are you preparing for GATE CSE, NTA UGC NET, ISRO, or NIELIT Computer Science exams? Understanding DBMS and mastering SQL is crucial for scoring high in competitive exams. This article contains carefully selected practice questions on functional dependencies, normalization (3NF …
Prepare for NTA UGC NET Computer Science with these carefully curated questions covering SQL queries, relational algebra, entity-relationship models, foreign keys, normalization, and more. This comprehensive guide provides concept clarity and includes essential topics like referential integrity, joins (INNER and …
Relational Algebra Questions and Answers in DBMS Master the fundamentals of relational algebra with our detailed step-by-step solutions to common DBMS questions. This guide is perfect for students preparing for GATE, UGC NET, and technical interviews. Understand core concepts …
