Digital Concepts Questions and Answers

Practice Mode
Showing 10 of 93 questions
Q11
Parallel format means that:
  • A each digital signal has its own conductor.
  • B several digital signals are sent on each conductor.
  • C both binary and hexadecimal can be used.
  • D no clock is needed.
Answer: Option A
Q12
A decoder converts ________.
  • A noncoded information into coded form
  • B coded information into noncoded form
  • C HIGHs to LOWs
  • D LOWs to HIGHs
Answer: Option B
Q13
A DAC changes ________.
  • A an analog signal into digital data
  • B digital data into an analog signal
  • C digital data into an amplified signal
  • D none of the above
Answer: Option B
Q14
The output of a NOT gate is HIGH when ________.
  • A the input is LOW
  • B the input is HIGH
  • C the input changes from LOW to HIGH
  • D voltage is removed from the gate
Answer: Option A
Q15
15.    The output of an OR gate is LOW when ________.
  • A all inputs are LOW
  • B any input is LOW
  • C any input is HIGH
  • D all inputs are HIGH
Answer: Option A
Q16
Which of the following is not an analog device?
  • A Thermocouple
  • B Current flow in a circuit
  • C Light switch
  • D Audio microphone
Answer: Option C
Q17
A demultiplexer has ________.
  • A one data input and a number of selection inputs, and they have several outputs
  • B one input and one output
  • C several inputs and several outputs
  • D several inputs and one output
Answer: Option A
Q18
A flip-flop has ________.
  • A one stable state
  • B no stable states
  • C two stable states
  • D none of the above
Answer: Option C
Q19
Digital signals transmitted on a single conductor (and a ground) must be transmitted in:
  • A slow speed.
  • B parallel.
  • C analog.
  • D serial.
Answer: Option D
Q20
In a certain digital waveform, the period is four times the pulse width. The duty cycle is ________.
  • A 0%
  • B 25%
  • C 50%
  • D 100%
Answer: Option B

📚 More from Digital Electronics

← All Topics 🎯 Practice ⏱️ Take Test 🔍 Search
Digital Electronics
Back to Digital Electronics
Other Subjects
Questions and Answers for Competitive Exams Various Entrance Test