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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 7 of 11

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Q61.
The operations used to combine multiple relations to present information in single table are classified as

a.

outer relations

b.

inner joins

c.

outer joins

d.

inner relations

Discuss
Answer: (b).inner joins
Q62.
In the notation for query graphs, the single circles are used to represent

a.

relation nodes

b.

query nodes

c.

truth nodes

d.

local nodes

Discuss
Answer: (a).relation nodes
Q63.
The JOIN operation in which only equality operator is used is classified as

a.

CHI-JOIN

b.

PI-JOIN

c.

SIGMA-JOIN

d.

EQUI JOIN

Discuss
Answer: (d).EQUI JOIN
Q64.
In relational calculus, the expression which does not guarantees finite number of tuples is classified as

a.

unsafe expression

b.

safe expression

c.

declarative expression

d.

stable expression

Discuss
Answer: (a).unsafe expression
Q65.
In unary relational operations, the PROJECT operation is partition of relation usually classified as

a.

horizontal partition

b.

vertical partition

c.

insert partition

d.

delete partition

Discuss
Answer: (b).vertical partition
Q66.
The JOIN operation in which two attributes joined have same name in both relations is classified as

a.

UNNATURAL JOIN

b.

THETA JOIN

c.

ALPHA JOIN

d.

NATURAL JOIN

Discuss
Answer: (d).NATURAL JOIN
Q67.
Consider two tuples A and B, the operation whose result includes tuples that are included in both relations is classified as

a.

intersection of relation A and B

b.

difference of relation A and B

c.

square of relation A and B

d.

union of relation A and B

Discuss
Answer: (a).intersection of relation A and B
Q68.
The operation which is used to select the subset of tuples by satisfying the selection constraint and the selection is made from relation is classified as

a.

CHOOSE operation

b.

SELECT operation

c.

NON-SELECT operation

d.

SUBSET operation

Discuss
Answer: (b).SELECT operation
Q69.
The value of the atom which evaluates either condition is TRUE or FALSE for particular combination of tuples is classified as

a.

intersection value

b.

union value

c.

truth value

d.

deny value

Discuss
Answer: (c).truth value
Q70.
The representation of relational calculus internal queries is classified as

a.

structural graph

b.

nodes graph

c.

query graph

d.

functional graph

Discuss
Answer: (c).query graph
Page 7 of 11

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