Question

Given above are four logic gate symbols. Those for OR, NOR and NAND are respectively.

A. a, d, c
B. d, a, b
C. a, c, d
D. d, b, a

Answer 1

Hint: The above problem can be resolved using the information about the logic gates and the types of logic gates used in the subject analysis. Moreover, the symbolic representation of each of such gates can be visualised by taking the notation of inputs and outputs respectively.


Complete step-by-step answer
From the given figure, the logic gates are named as follows:
Figure a represents the logic gate known as OR gate.
Figure b represents the logic gate known as AND gate.
Figure c represents the logic gate that is formed by the combination of the OR Gate and NOT gate. Thus, the logic gate collectively known as NOR gate.
Figure d represents the logic gate that is formed by the combination of the AND Gate and NOT gate. Thus, the logic gate collectively known as NAND gate.
Therefore, as per the given condition, the figure a represents the NOR gate, figure c represents the NOR gate and the figure d represents the NAND gate. And option C is correct.
Note: In order to resolve the given problem, one must be aware of the logic gates, its type and its applications in various fields. Moreover, to predict the kind of logic gate, it is necessary to make sure about the number of inputs and output terminals contained by the logic gates.