Digital Electronics:: Digital Concepts MCQs

Question 1

PLCC packages have leads on ________.

Accepted Answer

four sides

Answer

one side

Answer

two sides

Answer

three sides

Question 2

What is the typical invalid voltage for a binary signal?

Accepted Answer

0.8–2 volts

Answer

0.7–2.8 volts

Answer

0.8–3 volts

Answer

0.7–2.5 volts

Question 3

Convert the fractional binary number 0001.0010 to decimal.

Accepted Answer

1.125

Answer

1.40

Answer

1.20

Answer

1.80

Question 4

Convert the fractional binary number 10010.0100 to decimal.

Accepted Answer

18.25

Answer

24.50

Answer

18.40

Answer

16.25

Question 5

How many binary bits are necessary to represent 748 different numbers?

Accepted Answer

10

Answer

9

Answer

7

Answer

8

Question 6

A periodic digital waveform has a pulse width (tw) of 6 ms and a period (T) of 18 ms. The duty cycle is ________.

Accepted Answer

33.3%

Answer

3.3%

Answer

6%

Answer

18%

Question 7

Any number with an exponent of one is equal to:

Accepted Answer

that number.

Answer

zero.

Answer

zero.

Answer

two.

Question 8

Serial format means digital signals are:

Accepted Answer

sent over one conductor sequentially.

Answer

sent over many conductors simultaneously.

Answer

sent in groups of eight signals.

Answer

sent in binary coded decimal.

Question 9

What is the decimal value of 2–1 ?

Accepted Answer

0.5

Answer

0.25

Answer

0.05

Answer

0.1