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50+ Most Asking Number System Mcqs Questions and Answers With _PDF Set-2 ___Number System

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Multiple Choice Questions (Number System)
Set-2
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Q.1 The hexadecimal digits are 1 to 0 and A to ……..
(A) E
(B)  F
(C) G
(D) D 
Q.2 The main advantage of hexadecimal numbers is the case of conversion from hexadecimal to…….
(A) decimal
(B) Binary
(C) ASCII
(D) BCD
Q.3 Binary coded decimal (BCD) numbers express each digit as a ……
(A) byte
IB) nibble
(C) bit
(D) all of these
Q.4 ASCII code is a 7 bit code for……
(A) letters
(B) numbers
(C) other symbols
(D) all of these
Q.5 How many bytes are there in 1011 1001 0110 1110 numbers?
(A) 1
(B) 2
(C) 4
(D) 8
Q.6 An OR gate has 6 inputs, how many input words are in its truth table?
(A) 64
(B) 32
(C) 16
(D) 128
Q.7 The binary equivalent of the octal Numbers 13.54 is…..
(A) 1011.1011
(B) 1101.1110
(C) 1001.1110
(D) all of these
Q.8 The octal equivalent of 111 010 is…..
(A) 81
(B) 72
(C) 71
(D) all of these
Q.9 A microprocessor with 12 address lines capable of addressing.
(A) 1024 locations
(B) 2048 locations
(C) 4096 locations
(D) Buk location
Q.10 The binary equivalent of the hexadecimal number 7 BD is…..
(A) 01111 0111101
(B) 111010111101
(C) 101110111101
(D) all of these
Q.11 Octal equivalent of the number 11010.1011 is….
(A) 32.15
(B) 63.51
(C) 32.27
(D) all of these
Q.12 The decimal equivalent of binary number 0.0111 is ……
(A) 4.375
(B) 0.4375
(C) 0.5375
(D) -0.4375
Q.13 The binary code of (73) power 10 is…….
(A) 1010001
(B) 1000100
(C) 1100101
(D) 1001001
Q.14 The range of the numbers which can be stored in an eight-bit register is…..
(A) – 128 to + 127
(B) -128 to + 128
(C) – 999999 to + 999999
(D) none of these
Q..15 The binary system has the radix of …..
(A) 0
(B) 1
(C) 2
(D) ½
Q.16 Which of the following is termed as the minimum error code?
(A) Binary code
(B) Gray code
(C) Excess 3 code
(D) Octal code
Q.17 Two’s complement of 1011.01 is….
(A) 0100.10
(B) 0100.11
(C) 1011.10
(D) 0100.01
Q.18 The parity bit is added for …….
(A) coding
(B) indexing
(C) error detection
(D) control key
Q.19 Hexadecimal numbers are a mixture of …..
(A) binary and decimal numbers
(B) letters and decimal digits
(C) binary and octal numbers
(D) octal and decimal numbers



Q.20 A half byte is called….
(A) bug
(B) nibble
(C) data
(D) bit
Q.21 The most commonly used character codes for transmission is…..
(A) EBCDIC
(B) ASCII
(C) Both (a) and (b)
(D) none of these
Q.22 The binary number 10011101 is equal to which hexadecimal number?
(A) 9E
(B) 9F
(C) 9D
(D) FF
Q.23 The binary coded decimal code 01100111 is equal to which decimal digit code……
(A) 103
(B) 76
(C) 67
(D) -67
Q.24 The decimal number 80 can be represented in BCD code as …….
(A) 1000 0001
(B) 0101 0000
(C) 0010 0000
(D) 1000000
Q.25 The two’s complement in binary system is useful for expressing…..
(A) positive numbers
(B) negative numbers
(C) both positive and negative numbers
(D) none of these
Q.26 The result of truncating the decimal number – 22.56 is….
(A) -22
(B) – 23
(C) 0
(D) -22.56
Q.27 ASCII code is an
(A) alphabet code
(B) numeric code
(C) alphanumeric code
(D) cyclic code
Q.28 Floating-point numbers are normally used to represent……
(A) very large or small numbers
(B) only large positive numbers
(C) only large negative numbers
(D) negative numbers within computer
Q.29 The Gray code for decimal 7 is ……
(A) 0111
(B) 1011
(C) 0100
(D) 0101
Q.30 The range for 13-bits complement numbers, expressed in decimal, is from…..
(A) – 127 to + 128
(B) – 127 to +127
(C) – 128 to + 128
(D) – 128 to + 127
Q.31. The input hexadecimal representation of 1110 is _______________
(A) 0111
(B) E
(C) 15
(D) 14
Q.32. Which of the following is not a binary number?
(A) 1111
(B) 101
(C) 11E
(D) 000
Q.33. Convert the binary number 11001 to decimal.  The answer is         
(A) 25
(B) 13
(C) 3
(D) 4
Q.34. Convert the binary number 11011 to hexadecimal               
(A) 1A
(B) B1
(C) 1B
(D) 2B
Q.35. Convert the hexadecimal number 2C to decimal
(A) 3A
(B) 34
(C) 44
(D) 55
Q.36. Cumulative addition of four bits ( 1 + 1 + 1 + 1 ) gives
(A) 1111
(B) 111
(C) 100
(D) 1001
Q.37. Difference between binary coding and binary coded decimal is
(A) binary coding has a decimal format
(B) BCD has no decimal format
(C) binary coding is pure binary
(D) BCD is pure binary
Q.38. Convert binary 01001110 to decimal.
(A) 4E
(B) 78
(C) 76
(D) 116
Q.39. The octal numbering system:
(A) simplifies tasks
(B) groups binary numbers in groups of 4
(C) saves time
(D) simplifies tasks and saves time
Q.40. Convert the following octal number to binary-768
(A) 1101112
(B) 1111102
(C) 1111002
(D) 1001112
Q.41. Which of the following is not a positional number system?
(A) Roman Number System
(B) Octal Number System
(C) Binary Number System
(D) Hexadecimal Number System
Q.42. A computer language that is written in binary codes only is _____
(A) machine language
(B) C
(C) C#
(D) pascal
Q.43. Convert the binary equivalent 10101 to its decimal equivalent.
(A) 21
(B) 12
(C) 22
(D) 31
Q.44. Which of the following is the correct representation of a binary number?
(A) (124)2
(B) 1110
(C) (110)2
(D) (000)2
Q.45. Convert the hexadecimal number B2 to binary      
(A) 100011
(B) 11011
(C) 10110010
(D) 100100001                    
Q.46. Convert the decimal number 20 to hexadecimal   
(A) 14
(B) 11
(C) 1B
(D) 2B
Q.47. Power of binary system for positional values is
(A) 2
(B) 10
(C) 8
(D) 16
Q.48. Which is not a word size?
(A) 64
(B) 28
(C) 16
(D) 8
Q.49. Which of the following is not a positional number system?
(A) Roman Number System
(B) Octal Number System
(C) Binary Number System
(D) Hexadecimal Number System
Q.50. The octal equivalent of 1100101.001010 is ______
(A) 624.12
(B) 145.12
(C) 154.12
(D) 145.21
Q.51. Number system which contains 5 symbols 0, 1, 2, 3 and 4, is
(A) binary system
(B) decimal system
(C) octal system
(D) quinary system
Q.52. The binary number 1110 is equal to the decimal number ________.
(A) 3
(B) 1
(C) 7
(D) 14
Q.53. The binary equivalent of the decimal number 10 is __________
(A) 0010
(B) 10
(C) 1010
(D) 010
Q.54. Number system which contains 8 different symbols 0, 1, 2, 3, 4, 5, 6, and 7, is
(A) hexadecimal system
(B) binary system
(C) octal system
(D) Decimal system
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