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Combinational Logic Circuits (Electronics) Question and Answers-Page first

Combinational Logic Circuits problems


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  • 1. A magnitude comparator determines:

  • Options
  • A. A ≠ B and if A ɑ B or A >> B
  • B. A ≈ B and if A > B or A < b
  • C. A = B and if A > B or A < b
  • D. A ≡ B and if A < b or a > B

  •           Discuss     

  • 2. A basic multiplexer principle can be demonstrated through the use of a:

  • Options
  • A. single-pole relay
  • B. DPDT switch
  • C. rotary switch
  • D. linear stepper

  •           Discuss     

  • 3. Select one of the following statements that best describes the parity method of error detection:

  • Options
  • A. Parity checking is best suited for detecting single-bit errors in transmitted codes.
  • B. Parity checking is best suited for detecting double-bit errors that occur during the transmission of codes from one location to another.
  • C. Parity checking is not suitable for detecting single-bit errors in transmitted codes.
  • D. Parity checking is capable of detecting and correcting errors in transmitted codes.

  •           Discuss     

  • 4. Which digital system translates coded characters into a more intelligible form?

  • Options
  • A. encoder
  • B. display
  • C. counter
  • D. decoder

  •           Discuss     

  • 5. A multiplexed display:

  • Options
  • A. accepts data inputs from one line and passes this data to multiple output lines
  • B. uses one display to present two or more pieces of information
  • C. accepts data inputs from multiple lines and passes this data to multiple output lines
  • D. accepts data inputs from several lines and multiplexes this input data to four BCD lines

  •           Discuss     

  • 6. One application of a digital multiplexer is to facilitate:

  • Options
  • A. code conversion
  • B. parity checking
  • C. parallel-to-serial data conversion
  • D. data generation

  •           Discuss     

  • 7. Most demultiplexers facilitate which of the following?

  • Options
  • A. decimal to hexadecimal
  • B. single input, multiple outputs
  • C. ac to dc
  • D. odd parity to even parity

  •           Discuss     

  • 8. Which type of decoder will select one of sixteen outputs, depending on the 4-bit binary input value?

  • Options
  • A. hexadecimal
  • B. dual octal outputs
  • C. binary-to-hexadecimal
  • D. hexadecimal-to-binary

  •           Discuss     

  • 9. A circuit that responds to a specific set of signals to produce a related digital signal output is called a(n):

  • Options
  • A. BCD matrix
  • B. display driver
  • C. encoder
  • D. decoder

  •           Discuss     

  • 10. How many inputs are required for a 1-of-10 BCD decoder?

  • Options
  • A. 4
  • B. 8
  • C. 10
  • D. 1

  •           Discuss     


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