Digital Circuit and Microprocessor MCQs

Question 1

Which of the following circuit is used for production of delays?

Accepted Answer

monostable multivibrator

Answer

astable multivibrator

Answer

bistable multivibrator

Answer

sclunitt-trigger

Question 2

A Schmitt-trigger can be used as a

Accepted Answer

comparator only

Answer

square-wave generator only

Answer

flip-flop only

Answer

comparator, square wave generator or flip-flop

Question 3

A 555 IC timer can be used to operate as

Accepted Answer

all of the above

Answer

as monostable multivibrator

Answer

an astable multivibrator

Answer

a voltage controlled oscillator

Question 4

The number of levels in a digital signal is

Accepted Answer

two

Answer

one

Answer

four

Answer

ten

Question 5

A device that converts from decimal to binary numbered is called

Accepted Answer

encoder

Answer

decoder

Answer

CPU

Answer

converter

Question 6

Decimal 15 in binary system can be written as

Accepted Answer

1111

Answer

1110

Answer

1100

Answer

1000

Question 7

If 4 in binary system is 100 then 8 will be

Accepted Answer

1000

Answer

10

Answer

100

Answer

111

Question 8

Binary 1010 in decimal system is equaivalent to

Accepted Answer

10

Answer

13

Answer

I9

Answer

23

Question 9

Binary 1111 when subtracted from binary 11111, the result in binary is

Accepted Answer

10000

Answer

11111I

Answer

1111

Answer

1000