Digital Electronics-Number Systems and Codes

Digital Electronics-Number Systems and Codes
1. Convert hexadecimal value 16 to decimal.
  • 2210
  • 1610
  • 1010
  • 2010
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2. Convert the following decimal number to 8-bit binary.
187
  • 101110112
  • 110111012
  • 101111012
  • 101111002
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3. Convert binary 111111110010 to hexadecimal.
  • EE216
  • FF216
  • 2FE16
  • FD216
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4. Convert the following binary number to decimal.
  • 11
  • 35
  • 15
  • 10
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5. Convert the binary number 1001.00102 to decimal.
  • 90.125
  • 9.125
  • 125
  • 12.5
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6. Decode the following ASCII message.
10100111010100101010110001001011001
01000001001000100000110100101000100
  • STUDYHARD
  • STUDY HARD
  • stydyhard
  • study hard
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7. The voltages in digital electronics are continuously variable.
  • TRUE
  • FALSE
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8. One hex digit is sometimes referred to as a(n):
  • byte
  • nibble
  • grouping
  • instruction
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9. Which of the following is the most widely used alphanumeric code for computer input and output?
  • Gray
  • ASCII
  • Parity
  • EBCDIC
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10. If a typical PC uses a 20-bit address code, how much memory can the CPU address?
  • 20 MB
  • 10 MB
  • 1 MB
  • 580 MB
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Digital Electronics
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