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Welcome to the SQL MCQs Page

Dive deep into the fascinating world of SQL with our comprehensive set of Multiple-Choice Questions (MCQs). This page is dedicated to exploring the fundamental concepts and intricacies of SQL, a crucial aspect of DBMS. In this section, you will encounter a diverse range of MCQs that cover various aspects of SQL, 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 SQL. 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 SQL. You can click on an option to test your knowledge before viewing the solution for a MCQ. Happy learning!

SQL MCQs | Page 31 of 38

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Q301.
In varying length character string CHAR(n), the 'n' represents

a.

number of rows

b.

number of columns

c.

number of characters

d.

maximum number of characters

Discuss
Answer: (d).maximum number of characters
Q302.
The concatenation operator in SQL which can concatenate two strings is denoted as

a.

double quotation marks

b.

double vertical bar

c.

single vertical bar

d.

triple vertical bar

Discuss
Answer: (b).double vertical bar
Q303.
In the statement DECIMAL () to specify numeric data type, the number of decimal digits is called

a.

the string

b.

the numeric strip

c.

the precision

d.

the scale

Discuss
Answer: (c).the precision
Q304.
Considering the change in schema statement in SQL, the command which is used to delete records of table and leave the definition of table for later use is classified as

a.

DELETE command

b.

DROP TABLE command

c.

PRIMARY KEY command

d.

SECONDARY KEY command

Discuss
Answer: (a).DELETE command
Q305.
In standard query language, the rows and columns are called respectively

a.

tuple and attributes

b.

quantifiers and identifiers

c.

predicator and indicator

d.

non-identifiers and quantifiers

Discuss
Answer: (a).tuple and attributes
Q306.
If the length of bit string is multiple of 4 then it can be specified with the notation called

a.

fixed string notation

b.

triple decimal notation

c.

double decimal notation

d.

hexadecimal notation

Discuss
Answer: (d).hexadecimal notation
Q307.
The referential triggered action clause in Standard Query Language is attached to constraint called

a.

primary key constraint

b.

stamped key constraint

c.

interval notation constraint

d.

foreign key constraint

Discuss
Answer: (d).foreign key constraint
Q308.
The types of bit-string data type are

a.

BIT(n)

b.

BIT VARYING(n)

c.

BIT FIX(n)

d.

both a and b

Discuss
Answer: (d).both a and b
Q309.
If the concatenation operator is applied to two strings such as [ 'ABCD' || 'wxyz' ] then the resultant string will be

a.

AwBxCyDz

b.

wxyzABCD

c.

ABCDwxyz

d.

ABCD+wxyz

Discuss
Answer: (c).ABCDwxyz
Q310.
In SQL, the constraints, constructs, views, domains and tables are classified as its

a.

elements

b.

declaration

c.

interpreters

d.

descriptors

Discuss
Answer: (a).elements
Page 31 of 38

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