Question

If both inputs of an s-r flip-flop are low, what will happen when the clock goes high?

Answer 1

there will be no changes in the output

Answer 2

if both inputs of s and r are low and clock is high then it will act as memory means whatever be the previous state that only it store.

CLK     S       R        QN+1

0          x       x          QN(memory)

1          0       0         QN(memory)

1           0       1             0

1            1       0            1

1             1       1            invalid