Name the flip-flop which is having a single input ?

16) How many flip-flops are required to store 8 binary bits ?

17) What are the two inputs (A and B) of the 'NOR' gate, if the output (Y) = 1 ?

18) In NOR gate, if the output Y = 1, what will be the two inputs ?

19) The equivalent binary number to the decimal number '6' is