143) For which of the following flip-flops, the output is clearly defined for all combinations of two inputs ?

144) When a large number of analog signals are to be converted an analog multiplexer is used. In this case most suitable A.D. converter will be

145) To build a mod-19 counter the number of flip-flops required is

146) The stable multi-vibrator has

147) How many bits are required to encode all twenty six letters, ten symbols, and ten numerals ?