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

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Database management system multiple choice questions and answers page contain 5 questions from chapter Relational algebra and calculus. Each objective question has 4 possible answers. Choose your answer and check it with the given correct answer.
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(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

Comment

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

Comment

Answer: Option [A]

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(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

Comment

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

Comment

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

Comment

Answer: Option [C]

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DATABASE MANAGEMENT SYSTEM MULTIPLE CHOICE QUESTIONS & ANSWERS – E-BOOK

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