The main advantage of flip-flops over transistor circuit is

(a) immunity from noise

(b) low heating

(c) low propagation delay time

(d) high propagation.

A JK flip-flop has its J input connected to logic level 1 and its K input to the Q

output. A clock pulse is fed to its clock input. The flip-flop will now

(a) change its state at each clock pulse

(b) go to state 1 and stay there

(c) go to state 0 and stay there

(d) retain its previous state

wat kind of multiplexing is used in airports???