Online GK Series

This site is dedicated to the aspirants of competitive exams SSC, UPSC, Railways, Postal Assistants, Bank, GATE and NET

3,00,000 Jobs Waiting For You

Relational Algebra and Calculus MCQs | Database Management System Multiple Choice Questions and Answers

Questions
1 If E1 and E2 are relational algebra expressions, then which of the following is NOT a relational algebra expression ?
A E1 ∪ E2
B E1 / E2
C E1 - E2
D E1 x E2

Answer: Option [B]
2 The operation of a relation X, produces Y, such that Y contains only selected attributes of X. Such an operation is :
A Projection
B Intersection
C Union
D Difference

Answer: Option [A]
3 If T1 and T2 are two relations, then which of the following is not a valid relational algebra expression ?
A T1 - T2
B T1 ∪ T2
C T1 ∩ T2
D All are valid expressions

Answer: Option [D]
4 Which of the following is not valid unary operation in the relational algebra ?
A select
B min
C project
D rename

Answer: Option [B]
5 Relational algebra is :
A Data Definition Language
B Meta Language
C Procedural query language
D Non procedural language

Answer: Option [C]

Chapters

Useful Computer Science EBooks