Digital Electronics Interview Questions and Answers
Experienced / Expert level questions & answers
Ques 1. Explain the concept of race condition in digital circuits.
A race condition occurs when the final state of a system depends on the timing of inputs, which can lead to unpredictable behavior.
Ques 2. Explain the concept of asynchronous logic.
Asynchronous logic does not use a clock signal and operates based on the arrival of input signals.
Ques 3. Explain the concept of clock skew in digital circuits.
Clock skew refers to the variation in arrival times of a clock signal at different parts of a circuit.
Ques 4. Define the terms 'hazard' and 'hazard cover' in digital circuits.
A hazard is a momentary glitch in the output, and a hazard cover is a technique used to eliminate or mitigate hazards.
Ques 5. Explain the concept of race-around condition in a JK flip-flop.
A race-around condition occurs when both inputs (J and K) of a JK flip-flop are high, causing the flip-flop to toggle continuously. To avoid this, one should be inverted or connected to the complement of the other.
Ques 6. Explain the working principle of an asynchronous counter.
An asynchronous counter does not use a common clock signal for all flip-flops. Instead, each flip-flop has its own clock input, resulting in a more flexible counting sequence.
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