Digital Electronics:: Digital Concepts MCQs

Question 1

Give the decimal value of binary 10010.

Accepted Answer

1810

Answer

610

Answer

910

Answer

2010

Question 2

Parallel format means that:

Accepted Answer

each digital signal has its own conductor.

Answer

several digital signals are sent on each conducto

Answer

both binary and hexadecimal can be used.

Answer

no clock is needed.

Question 3

A decoder converts ________.

Accepted Answer

coded information into noncoded form

Answer

noncoded information into coded form

Answer

HIGHs to LOWs

Answer

LOWs to HIGHs

Question 4

A DAC changes ________.

Accepted Answer

digital data into an analog signal

Answer

an analog signal into digital data

Answer

digital data into an amplified signal

Answer

none of the above

Question 5

The output of a NOT gate is HIGH when ________.

Accepted Answer

the input is LOW

Answer

the input is HIGH

Answer

the input changes from LOW to HIGH

Answer

voltage is removed from the gate

Question 6

The output of an OR gate is LOW when ________.

Accepted Answer

all inputs are LOW

Answer

any input is LOW

Answer

any input is HIGH

Answer

all inputs are HIGH

Question 7

Which of the following is not an analog device?

Accepted Answer

Light switch

Answer

Thermocouple

Answer

Current flow in a circuit

Answer

Audio microphone

Question 8

A demultiplexer has ________.

Accepted Answer

one data input and a number of selection inputs, and they have several outputs

Answer

one input and one output

Answer

several inputs and several outputs

Answer

several inputs and one output

Question 9

A flip-flop has ________.

Accepted Answer

two stable states

Answer

one stable state

Answer

no stable states

Answer

none of the above