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Digital Arithmetic Operations and Circuits (Digital Electronics) Question and Answers-Page first

Digital Arithmetic Operations and Circuits problems


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  • 1. What logic function is the sum output of a half-adder?

  • Options
  • A. AND
  • B. exclusive-OR
  • C. exclusive-NOR
  • D. NAND

  •           Discuss     

  • 2. Solve this binary problem: 01110010 ? 01001000 =

  • Options
  • A. 00011010
  • B. 00101010
  • C. 01110010
  • D. 00111100

  •           Discuss     

  • 3. Solving ?11 + (?2) will yield which two's-complement answer?

  • Options
  • A. 1110 1101
  • B. 1111 1001
  • C. 1111 0011
  • D. 1110 1001

  •           Discuss     

  • 4. Perform subtraction on each of the following binary numbers by taking the two's-complement of the number being subtracted and then adding it to the first number.
    01001        01100
    00011        00111

  • Options
  • A. 01100    10011
  • B. 00110    00101
  • C. 10110    10101
  • D. 00111    00100

  •           Discuss     

  • 5. Which of the following is the primary advantage of using binary-coded decimal (BCD) instead of straight binary coding?

  • Options
  • A. Fewer bits are required to represent a decimal number with the BCD code.
  • B. BCD codes are easily converted from decimal.
  • C. the relative ease of converting to and from decimal
  • D. BCD codes are easily converted to straight binary codes.

  •           Discuss     

  • 6. A half-adder circuit would normally be used each time a carry input is required in an added circuit.

  • Options
  • A. True
  • B. False

  •           Discuss     

  • 7. Fast-look-ahead carry circuits found in most 4-bit full-adder circuits:

  • Options
  • A. determine sign and magnitude
  • B. reduce propagation delay
  • C. add a 1 to complemented inputs
  • D. increase ripple delay

  •           Discuss     

  • 8. Solve the following:
    Digital Electronics Digital Arithmetic Operations and Circuits: Solve the following:

  • Options
  • A. 10011110
  • B. 01211110
  • C. 000100000100
  • D. 001000001000

  •           Discuss     

  • 9. Solve this binary problem: 01000110 ÷ 00001010 =

  • Options
  • A. 0111
  • B. 10011
  • C. 1001
  • D. 0011

  •           Discuss     

  • 10. One way to make a four-bit adder perform subtraction is by:

  • Options
  • A. inverting the output.
  • B. inverting the carry-in.
  • C. inverting the B inputs.
  • D. grounding the B inputs.

  •           Discuss     


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