Signals and Switches MCQs

Question 1

What is the frequency of a clock waveform if the period of that waveform is 1.25 s?

Accepted Answer

8 kHz

Answer

8 MHz

Question 2

The hexadecimal number 4B16 is transmitted as an 8-bit word in parallel. What is the time required for this transmission if the clock frequency is 2.25 MHz?

Accepted Answer

444 ns

Answer

444 s

Answer

3.55 s

Answer

3.55 ms

Question 3

Internally, a computer's binary data are almost always transmitted on parallel channels, commonly referred to as the:

Accepted Answer

data bus

Answer

parallel bus

Answer

serial bus

Answer

memory bus

Question 4

Why is parallel data transmission preferred over serial data transmission for most applications?

Accepted Answer

It is much faster.

Answer

It is much slower.

Answer

It is cheaper.

Answer

More people use it.

Question 5

With surface-mount technology (SMT), the devices should:

Accepted Answer

mount directly

Answer

utilize transistor outline connections

Answer

have parallel connecting pins

Answer

require holes and pads

Question 6

Why, in most applications, are transistor switches used in place of relays?

Accepted Answer

all of the above

Answer

They consume less power.

Answer

They are faster.

Answer

They are quieter and smaller.

Question 7

How long will it take to serially transmit the hexadecimal number C316 if the clock frequency is 1.5 MHz?

Accepted Answer

5.33 s

Answer

4.69 ms

Answer

4.69 s

Answer

5.33 ms

Question 8

The family of logic that is composed of bipolar junction transistors is ____.

Accepted Answer

TTL

Answer

CMOS

Answer

DIP

Answer

BJT

Question 9

What can a relay provide between the triggering source and the output that semiconductor switching devices cannot?

Accepted Answer

total isolation and higher current rating

Answer

total isolation

Answer

faster

Answer

higher current rating