In an RS flip-flop, if the S line (Set line) is set high (1) and the R line (Reset line) is set low (0), then the state of the flip-flop is
(A) Set to 1
(B) Set to 0
(C) No change in state
(D) Forbidden


Answer: (A)

Explanation: When the Set line is set high and the Reset line is set low, then the RS flipflop has the state set to 1. Following is the truth table for RS flipflops:

S      R       Qn
1      0        1
0      1        0
0      0      no change
1      1      invalid

Refer: Flip-flop types

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  • Last Updated : 20 Nov, 2018

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