Digital Electronics:: Digital Concepts MCQs

Question 1

Digital systems have ________.

Accepted Answer

two states

Answer

one state

Answer

three states

Answer

four states

Question 2

Digital systems are called ________.

Accepted Answer

logic systems

Answer

binary systems

Answer

numbering systems

Answer

ADC systems

Question 3

1/4 as a binary number would be ________.

Accepted Answer

0.01

Answer

0.11

Answer

0.10

Answer

0.00

Question 4

The invalid range for an input to TTL logic is from ________.

Accepted Answer

0.8 to 2.0 V

Answer

0 to 0.8 V

Answer

1.2 to 1.6 V

Answer

2.0 to 5.0 V

Question 5

In a typical digital system, Logic 0 is 0V–0.8V, and Logic 1 is ________.

Accepted Answer

2–5V

Answer

2.5–5V

Answer

3.0–5.5V

Answer

3.5–5.5V

Question 6

Once a signal is digitized, the information it contains does not ________ as it is processed.

Accepted Answer

deteriorate

Answer

complain

Answer

stiffen

Answer

compress

Question 7

The rise-time of a pulse is normally measured between the ________.

Accepted Answer

10% and 90% level

Answer

0 and 100% level

Answer

30% and 70% level

Answer

50% level on the leading edge to the 50% level on the trailing edge

Question 8

A logic circuit that can store one bit of information is a ________.

Accepted Answer

flip-flop

Answer

counter

Answer

gate

Answer

code converter

Question 9

The horizontal axis of an oscilloscope is normally calibrated in units of ________.

Accepted Answer

time

Answer

voltage

Answer

current

Answer

frequency