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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 8 of 11

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Q71.
If matching tuples are not found, the kind of OUTER JOIN operation which keeps all the tuples of second relation out of the two relations is classified as

a.

UPWARD JOIN

b.

DOWNWARD JOIN

c.

LEFT OUTER JOIN

d.

RIGHT OUTER JOIN

Discuss
Answer: (d).RIGHT OUTER JOIN
Q72.
If matching tuples are not found, the kind of OUTER JOIN operation which keeps all the tuples of first relation out of the two relations is classified as

a.

LEFT OUTER JOIN

b.

RIGHT OUTER JOIN

c.

UPWARD JOIN

d.

DOWNWARD JOIN

Discuss
Answer: (a).LEFT OUTER JOIN
Q73.
The operation which only selects some of the columns from table and neglect the remaining columns is classified as

a.

OR operation

b.

AND operation

c.

TABLE operation

d.

PROJECT operation

Discuss
Answer: (d).PROJECT operation
Q74.
The operator which is useful for a single relation is classified as

a.

comparative operator

b.

unary operator

c.

ternary operator

d.

functional clause operator

Discuss
Answer: (b).unary operator
Q75.
The types of quantifiers are

a.

universal quantifier

b.

existential quantifier

c.

local quantifier

d.

both a and b

Discuss
Answer: (d).both a and b
Q76.
The single relational algebra expression can be used in sequence of operations by

a.

nesting entities

b.

nesting the attribute

c.

nesting the operations

d.

nesting the elements

Discuss
Answer: (c).nesting the operations
Q77.
In relational calculus, the expression which guarantees finite number of tuples is classified as

a.

declarative expression

b.

stable expression

c.

unsafe expression

d.

safe expression

Discuss
Answer: (d).safe expression
Q78.
The data structure in the form of tree to correspond to relational algebra expression is classified as

a.

relation tree

b.

attribute tree

c.

entity tree

d.

query tree

Discuss
Answer: (d).query tree
Q79.
The types of relational calculi includes

a.

domain calculus

b.

nodes calculus

c.

tuple calculus

d.

both a and c

Discuss
Answer: (d).both a and c
Q80.
If the duplicate relations will not be eliminated, the resultant tuples will be multiset of tuples rather than

a.

set of tuples

b.

set of entities

c.

set of attributes

d.

set of string characters

Discuss
Answer: (a).set of tuples
Page 8 of 11

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