Fundamentals of Computer_3: ASCII, BCD, Binary, Binary & Allied number systems, Conversion

Please find the below link:

https://www.eecs.wsu.edu/~ee314/handouts/numsys.pdf

https://www.geeksforgeeks.org/number-system-and-base-conversions/

https://www.electronics-tutorials.ws/binary/binary-coded-decimal.html

This set of Computer Fundamentals Multiple Choice Questions & Answers (MCQs) focuses on “The Binary Number System”.

1. 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

2. The value of radix in binary number system is _____________ a) 2 b) 8 c) 10 d) 1

3. The binary equivalent of the decimal number 10 is __________ a) 0010 b) 10 c) 1010 d) 010

4. A computer language that is written in binary codes only is _____ a) machine language b) C c) C# d) pascal

5. The octal equivalent of 1100101.001010 is ______ a) 624.12 b) 145.12 c) 154.12 d) 145.21

6. The input hexadecimal representation of 1110 is _______________ a) 0111 b) E c) 15 d) 14

7. A bit in a computer terminology means either 0 or 1. a) True b) False

8. Convert the binary equivalent 10101 to its decimal equivalent. a) 21 b) 12 c) 22 d) 31

9. Which of the following is not a binary number? a) 1111 b) 101 c) 11E d) 000

10. Which of the following is the correct representation of a binary number? a) (124)2 b) 1110 c) (110)2 d) (000)2

This set of Computer Fundamentals Multiple Choice Questions & Answers (MCQs) focuses on “The Octal Number System”.

1. What could be the maximum value of a single digit in an octal number system? a) 8 b) 7 c) 6 d) 5

2. In a number system, each position of a digit represents a specific power of the base. a) True b) False

3. The maximum number of bits sufficient to represent an octal number in binary is _______ a) 4 b) 3 c) 7 d) 8

4. The binary number 111 in octal format is ________________ a) 6 b) 7 c) 8 d) 5

5. Convert (22)8 into its corresponding decimal number. a) 28 b) 18 c) 81 d) 82

6. The octal equivalent of the binary number (0010010100)2 is ______________ a) 422 b) 242 c) 224 d) 226

7. Octal subtraction of (232)8 from (417)8 will give ______________ a) 165 b) 185 c) 815 d) 516

8. The 1’s complement of 0.101 is _________________ a) 1.010 b) 0.010 c) 0.101 d) 1.101

9. Convert (5401)8 to hexadecimal. a) A01 b) A02 c) B01 d) C01

10. Express the decimal format of the signed binary number (10010)2 . a) 2 b) 12 c) -12 d) -2

This set of Tough Computer Fundamentals Questions and Answers focuses on “The Hexadecimal Number System”.

1. What does the symbol D represent in a hexadecimal number system? a) 8 b) 16 c) 13 d) 14

2. ABC is a valid hexadecimal number. a) True b) False

3. The maximum number of bits sufficient to represent a hexadecimal number in binary: a) 4 b) 3 c) 7 d) 8

4. The binary number 1110 in hexadecimal format is _____________ a) 6 b) E c) 14 d) 15

5. Convert (52)16 into its decimal equivalent. a) 28 b) 83 c) 80 d) 82

6. The hexadecimal equivalent of the binary number (0010010100)2 is : a) 0B4 b) 0A4 c) 224 d) 0114

7. Hexadecimal Addition of (3A5)16 and (1B2)16 will give : a) 165 b) 185 c) 815 d) 516

8. The 2’s complement of 10.11 : a) 10 b) 0.010 c) 01.01 d) 10.01

9. Convert (6532)8 to hexadecimal. a) A01 b) A02 c) B01 d) C01

10. What do we call the point(decimal) in any hexadecimal number of form 111.A3? a) radix b) hexadecimal point c) decimal d) octal point

This set of Computer Fundamentals Multiple Choice Questions & Answers (MCQs) focuses on “BCD”.

1. A group of bits used to represent a symbol is called a ____________ a) byte b) memory c) nibble d) code

2. BCD uses 6 bits to represent a symbol. a) True b) False

3. Which of the following is not a type of computer code? a) EBCDIC b) BCD c) ASCII d) EDIC

4. The BCD representation of (34)10 is _______________ a) 6 b) 7 c) 8 d) 5

5. Perform BCD addition of (23)BCD + (20)BCD . a) 00110100 b) 01000011 c) 10011 d) 11100

6. The weights used in Binary coded decimal code are: a) 4,2,1 b) 8,4,2,1 c) 6,4,2,1 d) 2,1

7. Write the decimal equivalent for (110001)BCD. a) 31 b) 13 c) C1 d) 1C

8. The 9’s complement of 45 is _____________ a) 45 b) 54 c) 64 d) 46

9. The 10’s complement of 455 is _________ a) 543 b) 544 c) 545 d) 546

10. The Excess-3 representation of (0100)BCD is __________ a) 0110 b) 1110 c) 0111 d) 1100

This set of Computer Fundamentals Multiple Choice Questions & Answers (MCQs) focuses on “EBCDIC”.

1. What does EBCDIC stand for? a) Extended Binary Converted Decimal Intermediate Code b) Extended Binary Coded Decimal Intermediate Code c) Extended Binary Coded Decimal Interchange Code d) Extended Binary Converted Decimal Interchange Code

2. In EBCDIC, a maximum of 128 different characters can be represented. a) True b) False

3. The EBCDIC code for the character A is ______________ a) digit : 1100 zone : 0001 b) digit : 1111 zone : 0001 c) digit : 1100 zone : 1010 d) digit : 1111 zone : 1010

4. The hex representation for F is _______________ a) C6 b) C5 c) D6 d) D1

5. In EBCDIC, D5 is used to represent ________ character. a) J b) N c) O d) K

6. Which of the following is not a character of the digit 1110? a) S b) Z c) O d) X

7. What is the hexadecimal equivalent of the digit 9? a) E9 b) F9 c) G9 d) H9

8. The characters from 0 to 9 have their common digit as ___________ a) 1111 b) 0000 c) 0001 d) 1000

9. The EBCDIC is mainly used in ___________ a) Programming b) Machine Codes c) Mainframes d) Super Computers

10. Which of the following character is available in EBCDIC but not in ASCII? a) cent sign b) dollar sign c) comma d) punctuation

This set of Computer Fundamentals Multiple Choice Questions & Answers (MCQs) focuses on “ASCII”.

1. What does ASCII stand for? a) American Standard Code for Information Interchange b) American Scientific Code for Information Interchange c) American Scientific Code for Interchanging Information d) American Standard Code for Interchanging Information

2. The decimal representation for the character ‘!’ in ASCII is ____________ a) 31 b) 32 c) 33 d) 34

3. The two types of ASCII are _____________ and ____________ a) ASCII-4 and ASCII-8 b) ASCII-8 and ASCII-16 c) ASCII-7 and ASCII-8 d) ASCII-4 and ASCII-16

4. Any set of digits or alphabets are generally referred as ______________ a) Characters b) Symbols c) Bits d) Bytes

5. The first 128 characters are the same in both the types of ASCII i.e. ASCII-7 and ASCII-8. a) True b) False

6. The number of characters that can be represented in ASCII-8 are ______________ a) 128 b) 256 c) 32 d) 64

7. The zone of alphabetic characters from A to O in ASCII is _____________ a) 1000 b) 0100 c) 0010 d) 0001

8. The representation of the number 8 in binary in ASCII-8 format _________ a) 00111000 b) 01001000 c) 1000 d) 00011000

9. Binary Coding for the letter X is ______________ a) 01011000 b) 00111000 c) 10001000 d) 00010100

10. Express the ASCII equivalent of the signed binary number (00110010)2. a) 2 b) 1 c) A d) ,