Computer Sciences MCQs Chapter 9 Class 12

Computer Sciences MCQs Class 12: Boost Your Problem-Solving

Computer Sciences MCQs Class 12 are essential for students preparing for NUST, UET, FAST, ECAT, NTS, and FSC board exams. These MCQs help students practice regularly, strengthen logic, and develop coding skills.

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Created on February 22, 2023 By Ali Durrani

Computer Sciences Ch 9 Class 12

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1 / 20

How many keywords are in C?

100

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2. Which of the following is a valid character constant?

"b"

'6'

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17. The logical not (!) operator is denoted as:

Ternary operator

Unary operator

Binary operator

Bitwise operator

4 / 20

18. a b is equivalent to

b -F= a

a =+ b

a=a+b

b=b-Fa

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A quantity whose value cannot change during execution of

constant

keyword

variable

token

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11. Which of the operator has lowest presidence

7 / 20

1. Variables are created in

RAM

ROM

HARD DIS

CACHE

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13. is valid variable name

2-S

S-2

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16. C is a strongly typed language, this means that:

Every program must be compiled before execution

Every variable must be declared before it is being used

The variable declaration also defines the variable

Sufficient data types are available to manipulate each type of data

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5. The predefined words of the programming language that are used for special purposes in the source program are called:

Keywords

Statements

Special words

Alphabet

11 / 20

14. Which of the following characters cannot be used as first character of a variable name?

12 / 20

. A quantity whose value may change during execution of program is called:

Constant

string constant

variable

token

13 / 20

4. When the result of the computation of two very small numbers is too small to be represented, this phenomenon is called:

Arithmetic overflow

Arithmetic underflow

Truncation

Round off

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19. The words used to write the statements of a program are called

Special Words

Words

Keywords

Alphabets

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3. Which of the data type offers the highest precision?

float

long int

long double

unsigned long int

16 / 20

is not a valid variable

6_XYZ

roll no

XYZ

ABC

17 / 20

15. In C, the maximum length of variable name is:

256

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10. The symbol = represents:

Comparison operator

Equal to operator

Assignment operator

None of these

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20. elements of program in not token:

keyword

string constant

variable

comment

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12. Relational operators are used to

Establish a relationship among variables

Compare two values.

Construct compound condition

Perform arithmetic operations.

Your score is

The average score is 71%

Benefits of Practicing

Practicing these MCQs allows students to identify weak areas, enhance analytical skills, and improve time management. It also boosts confidence and exam readiness.

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