Digital Concepts Questions and Answers
Digital Concepts are foundational to modern electronics and computer architecture, making them a key area in programming questions and answers for GATE, DRDO, and ISRO aspirants. Topics include logic gates, Boolean algebra, number systems, and logic simplification techniques. Understanding digital principles helps in designing efficient digital systems and solving logic-based problems. Practicing digital concepts MCQs and test papers enhances analytical thinking and prepares students for both academic exams and technical interviews in electronics and computer engineering domains.
Digital Concepts
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93 questions
11. Parallel format means that:
- each digital signal has its own conductor.
- several digital signals are sent on each conductor.
- both binary and hexadecimal can be used.
- no clock is needed.
12. A decoder converts ________.
- noncoded information into coded form
- coded information into noncoded form
- HIGHs to LOWs
- LOWs to HIGHs
13. A DAC changes ________.
- an analog signal into digital data
- digital data into an analog signal
- digital data into an amplified signal
- none of the above
14. The output of a NOT gate is HIGH when ________.
- the input is LOW
- the input is HIGH
- the input changes from LOW to HIGH
- voltage is removed from the gate
15. 15. The output of an OR gate is LOW when ________.
- all inputs are LOW
- any input is LOW
- any input is HIGH
- all inputs are HIGH
16. Which of the following is not an analog device?
- Thermocouple
- Current flow in a circuit
- Light switch
- Audio microphone
17. A demultiplexer has ________.
- one data input and a number of selection inputs, and they have several outputs
- one input and one output
- several inputs and several outputs
- several inputs and one output
18. A flip-flop has ________.
- one stable state
- no stable states
- two stable states
- none of the above
19. Digital signals transmitted on a single conductor (and a ground) must be transmitted in:
- slow speed.
- parallel.
- analog.
- serial.
20. In a certain digital waveform, the period is four times the pulse width. The duty cycle is ________.
- 0%
- 25%
- 50%
- 100%