Home » mcq » Digital computer electronics » The dynamic race hazard problem occurs in A. combinational circuits only B. sequential circuits only C. both combinational and sequential circuits D. none of the combinational and sequential circuits E. None of the above
combinational circuits only
sequential circuits only
both combinational and sequential circuits
none of the combinational and sequential circuits E. None of the above
Answer is Wrong!
Answer is Right!
The correct answer is: C. both combinational and sequential circuits.
A dynamic race hazard problem occurs when the order of events in a digital circuit can affect the output. This can happen in both combinational and sequential circuits.
In a combinational circuit, the output is determined solely by the inputs at the current time. However, if the inputs change at different times, the
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output may change depending on the order in which the changes occur. This is called a dynamic race hazard.
In a sequential circuit, the output is determined by the inputs and the state of the circuit. The state of the circuit is determined by the previous inputs and outputs. If the inputs change at different times, the state of the circuit may change depending on the order in which the changes occur. This can also lead to a dynamic race hazard.
To avoid dynamic race hazards, it is important to design circuits so that the inputs change at the same time. This can be done by using synchronizers to ensure that the inputs are stable before they are used in the circuit.
Here is a brief explanation of each option:
- Option A: Combinational circuits only. This is incorrect because dynamic race hazards can also occur in sequential circuits.
- Option B: Sequential circuits only. This is incorrect because dynamic race hazards can also occur in combinational circuits.
- Option C: Both combinational and sequential circuits. This is the correct answer because dynamic race hazards can occur in both types of circuits.
- Option D: None of the combinational and sequential circuits. This is incorrect because dynamic race hazards can occur in both types of circuits.
- Option E: None of the above. This is incorrect because option C is the correct answer.