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Welcome to the DBMS MCQs Page

Dive deep into the fascinating world of DBMS with our comprehensive set of Multiple-Choice Questions (MCQs). This page is dedicated to exploring the fundamental concepts and intricacies of DBMS, a crucial aspect of UGC CBSE NET Exam. In this section, you will encounter a diverse range of MCQs that cover various aspects of DBMS, 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 UGC CBSE NET Exam.

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

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

DBMS MCQs | Page 20 of 23

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Q191.
The completeness constraint has rules:

a.

Supertype, Subtype

b.

Total specialization, Partial specialization

c.

Specialization, Generalization

d.

All of the above

Discuss
Answer: (b).Total specialization, Partial specialization
Q192.
The entity type on which the ................. type depends is called the identifying owner.

a.

Strong entity

b.

Relationship

c.

Weak entity

d.

E - R

Discuss
Answer: (c).Weak entity
Q193.
Match the following:

(i) 5 NF              (a) Transitive dependencies eliminated
(ii) 2 NF             (b) Multivalued attribute removed
(iii) 3 NF            (c) Contains no partial functional dependencies
(iv) 4 NF            (d) Contains no join dependency

a.

i-a, ii-c, iii-b, iv-d

b.

i-d, ii-c, iii-a, iv-b

c.

i-d, ii-c, iii-b, iv-a

d.

i-a, ii-b, iii-c, iv-d

Discuss
Answer: (b).i-d, ii-c, iii-a, iv-b
Q194.
The normalization of 1NF relations to 2NF involves:

a.

Removal of partial dependencies

b.

Removal of full dependencies

c.

Removal of transitive dependencies

d.

Removal of multi-valued dependencies

Discuss
Answer: (a).Removal of partial dependencies
Q195.
Tuple in relational algebra refers to:

a.

Row

b.

Column

c.

Table

d.

Relation

Discuss
Answer: (a).Row
Q196.
A relation R on a set X is said to be a partial ordering if R is

a.

Reflexive, Symmetric, Transitive

b.

Reflexive, Symmetric, Non-Transitive

c.

Reflexive, Anti-Symmetric, Transitive

d.

Reflexive, Anti-Symmetric, Non-Transitive

Discuss
Answer: (c).Reflexive, Anti-Symmetric, Transitive
Q197.
An attribute or set of attributes within one relation that matches the candidate key of some(possibly the same) relation:

a.

Super key

b.

Candidate key

c.

Primary key

d.

Foreign key

Discuss
Answer: (d).Foreign key
Q198.
With QBE, inserting records from one or more source tables into a single target table can be achieved by:

a.

Append action query

b.

Update action query

c.

Insert action query

d.

Make table action query

Discuss
Answer: (a).Append action query
Q199.
SQL command to delete a column from an existing table:

a.

Alter table

b.

Drop table

c.

Delete table

d.

Delete column

Discuss
Answer: (a).Alter table
Q200.
For the following sample database table staff. The SQL query:

SELECT COUNT(Staff no) AS mycount, SUM(Salary) AS mysum FROM Staff WHERE Designation=’Manager’

Returns the result

a.

mycount=2, mysal=47000

b.

mycount=2, mysal=98000

c.

mycount=5, mysal=47000

d.

mycount=5, mysal=98000

Discuss
Answer: (b).mycount=2, mysal=98000
Page 20 of 23

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