Computer Sciences MCQs Chapter 9 Class 12

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Created on February 22, 2023

Computer Sciences Ch 9 Class 12

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How many keywords are in C?

100

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13. is valid variable name

2-S

S-2

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is not a valid variable

6_XYZ

roll no

XYZ

ABC

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

Constant

string constant

variable

token

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

float

long int

long double

unsigned long int

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

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11. Which of the operator has lowest presidence

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1. Variables are created in

RAM

ROM

HARD DIS

CACHE

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

"b"

'6'

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18. a b is equivalent to

b -F= a

a =+ b

a=a+b

b=b-Fa

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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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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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10. The symbol = represents:

Comparison operator

Equal to operator

Assignment operator

None of these

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A quantity whose value cannot change during execution of

constant

keyword

variable

token

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

256

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20. elements of program in not token:

keyword

string constant

variable

comment

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

Ternary operator

Unary operator

Binary operator

Bitwise operator

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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

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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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12. Relational operators are used to

Establish a relationship among variables

Compare two values.

Construct compound condition

Perform arithmetic operations.

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