27) How many lines the truth table for a four-input NOR gate would contain to cover all possible input combinations ?

28) A toggle operation cannot be performed using a single

29) Which table shows the electrical state of a digital circuit ′s output for every possible combination of electrical states in the inputs

30) What is the minimum number of 2 input NAND gates required to implement the functionF = (x'+y') (z+w)

31) How many truth tables can be made from one function table ?