Digital Circuit and Microprocessor MCQs

Question 1

The number 178 is equivalent to binary

Accepted Answer

111,1

Answer

111

Answer

1110

Answer

10000

Question 2

Hexadecimal number system is used as a shorthand language for representing numbers.

Accepted Answer

decimal

Answer

binary

Answer

octal

Answer

large

Question 3

The binary equivalent of A16 is

Accepted Answer

1010

Answer

1011

Answer

1000

Answer

1110

Question 4

Which of the following 4-bit combinations is/are invalid in the BCD code?

Accepted Answer

1010

Answer

10

Answer

101

Answer

1000

Question 5

In Excess-3 code each coded number is than in BCD code.

Accepted Answer

three larger

Answer

four larger

Answer

three smaller

Answer

much larger

Question 6

Which numbering system uses numbers and letters as symbols?

Accepted Answer

hexadecimal

Answer

decimal

Answer

binary

Answer

octal

Question 7

To convert a whole decimal number into a hexadecimal equivalent, one should divide the decimal value by

Accepted Answer

2

Answer

8

Answer

10

Answer

16

Question 8

A logic gate is an electronic circuit which

Accepted Answer

makes logic decision

Answer

allows electron flow only in one direction

Answer

works on binary algebra

Answer

alternates between 0 and 1 values

Question 9

In positive logic, logic state 1 corresponds to

Accepted Answer

higher voltage level

Answer

positive yoltage

Answer

zero voltage level

Answer

lower voltage level