Which of the following circuit has its output dependent only upon the present input?

Question

Question

This question was previously asked in

RRB ALP Electronics Mechanic 21 Jan 2019 Official Paper (Shift 3)

Answer 1

In combinational circuits, the output is dependent only upon the present input.

Combinational Circuits	Sequential Circuits
The output depends entirely on the present input	The output depends on the present as well past input
No feedback is present between the input and output	A feedback path exists between the input and output
It exhibits a faster speed	It exhibits slower speed
These circuits do not have a clock, thus they don’t require triggering	Because a sequential circuit depends on a clock, it usually requires triggering
They do not possess any memory element	They always possess a memory element
Example- De-multiplexer, Multiplexer, Encoder etc.	Example- Counters, Flip-flops etc.