3) The time required for a pulse to change from 10 to 90 percent of its maximum value is called

4) The maximum frequency at which digital data can be applied to gate is called

5) What is the minimum number of two-input NAND gates used to perform the function of two input OR gate ?

6) Odd parity of word can be conveniently tested by

7) Which one of the following will give the sum of full adders as output