Electronics Combinational Logic Circuits Questions and Answers

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Showing 10 of 29 questions
Q1
Most demultiplexers facilitate which of the following?
  • A decimal to hexadecimal
  • B single input, multiple outputs
  • C ac to dc
  • D odd parity to even parity
Answer: Option B
Q2
One application of a digital multiplexer is to facilitate:
  • A code conversion
  • B parity checking
  • C parallel-to-serial data conversion
  • D data generation
Answer: Option B
Q3
A multiplexed display:
  • 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
Answer: Option B
Q4
When two or more inputs are active simultaneously, the process is called:
  • A first-in, first-out processing
  • B priority encoding
  • C ripple blanking
  • D priority decoding
Answer: Option B
Q5
Which type of decoder will select one of sixteen outputs, depending on the 4-bit binary input value?
  • A hexadecimal
  • B dual octal outputs
  • C binary-to-hexadecimal
  • D hexadecimal-to-binary
Answer: Option A
Q6
A circuit that responds to a specific set of signals to produce a related digital signal output is called a(n):
  • A BCD matrix
  • B display driver
  • C encoder
  • D decoder
Answer: Option C
Q7
Which digital system translates coded characters into a more intelligible form?
  • A encoder
  • B display
  • C counter
  • D decoder
Answer: Option D
Q8
A basic multiplexer principle can be demonstrated through the use of a:
  • A single-pole relay
  • B DPDT switch
  • C rotary switch
  • D linear stepper
Answer: Option C
Q9
In a BCD-to-seven-segment converter, why must a code converter be utilized?
  • A No conversion is necessary.
  • B to convert the 4-bit BCD into gray code
  • C to convert the 4-bit BCD into 10-bit code
  • D to convert the 4-bit BCD into 7-bit code
Answer: Option D
Q10
What is a combinational circuit?
  • A Circuit with memory elements
  • B Circuit whose output depends only on current inputs
  • C Circuit with feedback
  • D Circuit with clock input
Answer: Option B
Explanation: Combinational circuits produce outputs based only on current inputs without memory elements.

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