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Welcome to the Relational Algebra MCQs Page

Dive deep into the fascinating world of Relational Algebra with our comprehensive set of Multiple-Choice Questions (MCQs). This page is dedicated to exploring the fundamental concepts and intricacies of Relational Algebra, a crucial aspect of DBMS. In this section, you will encounter a diverse range of MCQs that cover various aspects of Relational Algebra, from the basic principles to advanced topics. Each question is thoughtfully crafted to challenge your knowledge and deepen your understanding of this critical subcategory within DBMS.

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Check out the MCQs below to embark on an enriching journey through Relational Algebra. Test your knowledge, expand your horizons, and solidify your grasp on this vital area of DBMS.

Note: Each MCQ comes with multiple answer choices. Select the most appropriate option and test your understanding of Relational Algebra. You can click on an option to test your knowledge before viewing the solution for a MCQ. Happy learning!

Relational Algebra MCQs | Page 11 of 11

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Q101.
Which of the following is the comparison operator in tuple relational calculus

a.

⇒

b.

=

c.

ε

d.

All of the mentioned

Discuss
Answer: (b).=
Q102.
An expression in the domain relational calculus is of the form

a.

{P(x1, x2, . . . , xn) | < x1, x2, . . . , xn > }

b.

{x1, x2, . . . , xn | < x1, x2, . . . , xn > }

c.

{ x1, x2, . . . , xn | x1, x2, . . . , xn}

d.

{< x1, x2, . . . , xn > | P(x1, x2, . . . , xn)}

Discuss
Answer: (d).{< x1, x2, . . . , xn > | P(x1, x2, . . . , xn)}
Q103.
Find the names of all instructors in the Physics department together with the course id of all courses they teach:

a.

{< c > | Э s (< c, a, s, y, b, r, t >ε section
∧s = “Fall” ∧ y = “2009”
∨Эu (< c, a, s, y, b, r, t >ε section
∧s = “Spring” ∧ y = “2010”

b.

{< n, c > | Э i, a (< i, c, a, s, y > ε teaches
∧ Э d, s (< i, n, d, s > ε instructor ∧ d = “Physics”))}

c.

{< n > | Э i, d, s (< i, n, d, s > ε instructor ∧ s > 80000)}

d.

{< i, n, d, s > | < i, n, d, s > ε instructor ∧ s > 80000}

Discuss
Answer: (b).{< n, c > | Э i, a (< i, c, a, s, y > ε teaches
∧ Э d, s (< i, n, d, s > ε instructor ∧ d = “Physics”))}
Q104.
In domain relaional calculus “there exist” can be expressed as

a.

(P1(x))

b.

(P1(x)) Э x

c.

V x (P1(x))

d.

Э x (P1(x))

Discuss
Answer: (d).Э x (P1(x))
Page 11 of 11

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