Number Systems and Codes Questions and Answers

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Showing 10 of 146 questions
Q1
Convert hexadecimal value 16 to decimal.
  • A 2210
  • B 1610
  • C 1010
  • D 2010
Answer: Option A
Q2
Convert the following decimal number to 8-bit binary. 187
  • A 101110112
  • B 110111012
  • C 101111012
  • D 101111002
Answer: Option A
Q3
Convert binary 111111110010 to hexadecimal.
  • A EE216
  • B FF216
  • C 2FE16
  • D FD216
Answer: Option B
Q4
Convert the following binary number to decimal.
  • A 11
  • B 35
  • C 15
  • D 10
Answer: Option A
Q5
Convert the binary number 1001.00102 to decimal.
  • A 90.125
  • B 9.125
  • C 125
  • D 12.5
Answer: Option B
Q6
Decode the following ASCII message. 10100111010100101010110001001011001 01000001001000100000110100101000100
  • A STUDYHARD
  • B STUDY HARD
  • C stydyhard
  • D study hard
Answer: Option B
Q7
The voltages in digital electronics are continuously variable.
  • A TRUE
  • B FALSE
Answer: Option B
Q8
One hex digit is sometimes referred to as a(n):
  • A byte
  • B nibble
  • C grouping
  • D instruction
Answer: Option B
Q9
Which of the following is the most widely used alphanumeric code for computer input and output?
  • A Gray
  • B ASCII
  • C Parity
  • D EBCDIC
Answer: Option B
Q10
If a typical PC uses a 20-bit address code, how much memory can the CPU address?
  • A 20 MB
  • B 10 MB
  • C 1 MB
  • D 580 MB
Answer: Option C

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