# Top 500+ 9th Class Computer Science Subject Mcqs Pdf Download Chapter No 05

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# Number Systems

Encircle the most appropriate answer among the following options

1:         The ASCII is a code.

(a) 5 bit

(b) 6 bit

(c) 7 bit

(d) 8 bit

2:         The EBCDIC is a code.

(a) 5 bit

(b) 6 bit

(c) 7 bit

(d) 8 bit]

3:         The collection of facts and figures is called

(a) Information

(b) Statistics

(c) Mathematics

(d) Data

4:         The data after processing is called

(a) Information

(b) Processed

(c) Percentage

(d) Information

5:         The set of characters including 26 characters of English alphabets and 10 decimal digits is called

(a) Numeric data

(b) Alphabet data

(c) Alphanumeric

(d) A11

6:         Computers directly understand digits

(a) Decimal

(b) Binary

(c) Octal

7:         Computer did not directly understand

(a) Letters

(b) Decimal

(c) Both a & b

(d) None

8:         45, 26, 15, 40 is a

(a) Arranged data

(b) Mechanical

(c) Raw

(d) Fixed

9:         Data is classified into typed

(a) 2

(b) 3

(c) 4

(d) None

10:       Binary numbers are

(a) 1,3

(b) 0,10

(c) 0, 1

(d) 1,1

11:       Real data contains numbers, which may be

(a) Fractions

(b) Whole Numbers

(c) Both a & b

(d) None

12:       The base of decimal number system is

(a) 2

(b) 8

(c) 10

(d) 16

13:       The data is represented on a computer by means of a two state ON and OFF system called

(a) A word

(b) Binary system

(c) Octal system

(d) ROM

14:       The base of binary number system is

(a) 2

(b) 8

(c) 10

(d) 16

15:       The base of octal number system is

(a) 2

(b) 8

(c) 10

(d) 16

16:       The binary number system is used in

(a) Analog computers

(b) Binary computers

(c) Decimal computers

(d) Digital computers

17:       The base of hexadecimal number system is

(a) 2

(b) 8

(c) 10

(d) 16

18:       Alphanumeric characters are expressed in terms of binary codes. In ASCII each character is represented as a

(a) 8 bit code

(b) 4 bit code

(c) 2 bit code

(d) 7 bit

19:       2’s complement of 1011.1 is

(a) 0. 100. 10

(b) 0100.1

(c) 1011.10

(d) 0100.0

20:      I’s complement of 1011.1 is

(a) 0. 100.101

(b) 0100.11

(c) 1011.10

(d) 0100.0

21:       A byte consist of nibbles

(a) 1

(b) 2

(c) 3

(d) 4

22:       10Â° =

(a) 10

(b) 0

(c) 1

(d) 101

23:       The digit from 0 to 9 are called

(a) Decimal

(b) Octal

(c) Binary

(d) Hexa

24: The binary equivalent of ( 20)10 is

(a) 1111

(b) 10011

(c) 10010

(d) 10100

25:       The decimal equivalent of ( 20)10 is

(a) 18

(b) 24

(c) 20

(d) invalid

26:       Decimal number system consists of

(a) 0,1,2,3,4,5

(b) 0,1,2,3,4,5,6

(c) 0,1,2,3,4,5,6,7,

(d) 0,1,2,3,4,5,6,7,8,9

27:       453 =

(a) 4 x 102 + 5 x 10 + 3

(b) 10 x 42 + 5 x 10

(c) 4 x 102+ 5 x 10 1 + 3 x 100

(d) None

28:       The decimal equivalent of (10)s is

(a) 9

(b) 10

(c) 11

(d) 8

29:       (236)10 = (?) 10

(a) 158

(b) 157

(c) 155

(d) 236

30:       (A)16 =?

(a) 10

(b) 11

(c) 16

(d) 12

31:       In 645 the most significant digit is

(a) 4

(b) 5

(c) 6

(d) 45

32:       In 724 the least significant digit is

(a) 7

(b) 4

(c) 2

(d) 72

33:       The number system that contains the range of 10 number and 6 alphabets is

(a) Decimal

(b) Octal

(c) Binary

(d) Hexa

34:       (0001)2 = (?)

(a) A

(b) 10

(c) 1

(d) 7

35:       Binary digits are denoted by

(a) IBT

(b) TBI

(c) BIT

(d) BTI

36:       01001(2) in decimal system is equal to

(a) 10

(b) 15

(c) 18

(d) 9

37:        I’s complement of 01110 is

(a) 00011

(b) 10001

(c) 11001

(d) 01010

38:        In binary number system 0 + 0 =?

(a) 1

(b) 0

(c) 00

(d) 10

39:        In binary number system 1 X 0 =?

(a) 1

(b) 0

(c) 10

(d) 01

40:        ASCII for 6 is equal to

(a) 0110001

(b) 0110110

(c) 1101100

(d) 0011010

41:       Which of the following is not a real number?

(a) 76.2

(b) 6.2

(c) 4

(d) 4.0

42:       In Hexadecimal number system the value of E is

(a) 15

(b) 12

(c) 14

(d) 16

43:       The value of hexadecimal digit A is (a) 9

(b) 10

(c) 11

(d) 12

44:       The number 822 represent the

(a) Binary number

(b) Octal Number

(c) Decimal

(d) None

(a) 100111

(b) 1010101

(c) 10001111

(d) 100011111

46:       The binary equivalent of decimal number (3)10 is

(a) 10

(b) 11

(c) 111

(d) 101

47:       The binary equivalent of (F)16 is

(a) 1010

(b) 1110

(c) 0111

(d) 1111

48:       The hexadecimal equivalent of binary number (101001)2 is

(a) 2A

(b) 2B

(c) 29

(d) 28

49:       The most commonly used character for transmission are

(a) EBCDIC

(b) BCD

(c) UNI

(d) ASCII

50:        In scientific notation power of 10 is called

(a) Logarithm

(b) Exponent

(c) Mantissa

(d) Coefficient