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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 1 of 23

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Q1.
Which of the following is true ?

a.

A relation in BCNF is always in 3NF

b.

A relation in 3NF is always in BCNF

c.

BCNF and 3NF are same

d.

A relation in BCNF is not in 3NF

Discuss
Answer: (a).A relation in BCNF is always in 3NF
Q2.
In DML, RECONNECT command cannot be used with

a.

OPTIONAL Set

b.

FIXED Set

c.

MANDATOR Set

d.

All of the above

Discuss
Answer: (b).FIXED Set
Q3.
A hash function f defined as f (key) = key mod 13, with linear probing is used to insert keys 55, 58, 68, 91, 27, 145. What will be the location of 79 ?

a.

2

b.

3

c.

4

d.

5

Discuss
Answer: (d).5
Q4.
The User Work Area (UWA) is a set of Program variables declared in the host program to communicate the contents of individual records between

a.

DBMS & the Host record

b.

Host program and Host record

c.

Host program and DBMS

d.

Host program and Host language

Discuss
Answer: (c).Host program and DBMS
Q5.
Given a Relation POSITION (Posting-No, Skill), then query to retrieve all distinct pairs of posting-nos requiring skill is

a.

Select p.posting-No, p.posting-No from position p where p.skill = p.skill and p.posting-No < p.posting-No

b.

Select p1.posting-No, p2.posting-No from position p1, position p2 where p1.skill = p2.skill

c.

Select p1.posting-No, p2.posting-No from position p1, position p2 where p1.skill = p2.skill and p1.posting-No < p2.posting-No

d.

Select p1.posting-No, p2.posting-No from position p1, position p2 where p1.skill = p2.skill and p1.posting-No = p2.posting.No

Discuss
Answer: (c).Select p1.posting-No, p2.posting-No from position p1, position p2 where p1.skill = p2.skill and p1.posting-No < p2.posting-No
Q6.
If a relation with a Schema R is decomposed into two relations R1 and R2 such that (R1 ∪ R2) = R1 then which one of the following is to be satisfied for a lossless joint decomposition (---> indicates functional dependency)

a.

(R1 ∩ R2) --> R1 or R1 ∩ R2 ---> R2

b.

R1  ∩ R2 --> R1

c.

R1∩ R2 --> R2

d.

R1 ∩ R2 --> R1 and R1 ∩ R2 --> R2

Discuss
Answer: (a).(R1 ∩ R2) --> R1 or R1 ∩ R2 ---> R2
Q7.
Which level of Abstraction describes how data are stored in the data base ? 

a.

Physical level

b.

View level

c.

Abstraction level

d.

Logical level

Discuss
Answer: (a).Physical level
Q8.
Third normal form is based on the concept of ______.

a.

Closure Dependency

b.

Transitive Dependency

c.

Normal Dependency

d.

Functional Dependency

Discuss
Answer: (b).Transitive Dependency
Q9.
The student. marks should not be greater than 100. This  is

a.

Integrity constraint

b.

Referential constraint

c.

Overdefined constraint

d.

Feasible constraint

Discuss
Answer: (a).Integrity constraint
Q10.
GO BOTTOM and SKIP-3 commands are given one after another in a database file of 30 records. It shifts the control to

a.

28th record

b.

27th record

c.

3rd  record

d.

4th record

Discuss
Answer: (b).27th record
Page 1 of 23

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