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Official PYQ · 1990

GATE CS 1990 Q4-i — Combinational Circuits

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State whether the following statements are TRUE or FALSE with reason:

RAM is a combinational circuit and PLA is a sequential circuit.
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Answer: 0

The given statement is FALSE (represented by 0).

Here is the detailed reasoning:

  • RAM (Random Access Memory): RAM is a sequential circuit. It consists of an array of memory cells (using latches, flip-flops, or capacitors) designed to store binary states. Because its outputs depend on both the current inputs and the stored internal state, it is sequential.
  • PLA (Programmable Logic Array): PLA is a combinational circuit. It is composed of a programmable AND array followed by a programmable OR array to implement Boolean functions in sum-of-products form. It contains no memory elements or feedback loops.

Since the statement asserts the exact opposite, it is entirely FALSE.

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