WorksheetsInformation Technologies-Unit 3 Module 3 TEST
Total questions: 15
Worksheet time: 8mins
Name
Class
Date
1.
Light waves, radio waves, and microwaves are examples of electromagnetic waves.
a)
True
b)
False
2.
Analog signals are _________ affected by noise than digital signals.
a)
More
b)
Less
3.
Which is an example of a signal being encoded?
a)
reading braille
b)
writing a word in Morse code
c)
hearing sound from a radio
d)
receiving an email
4.
Computers use digital information that is encoded as ________________numbers.
a)
digital
b)
binary
c)
singular
5.
Digital signals:
a)
can only be stored on computers
b)
consist of only two values
c)
are what is stored by camera film
6.
Which best explains why the receiver of a signal must understand the code or language being used?
a)
This allows the signal to be decoded
b)
This allows the signal to be transmitted.
c)
This allows the signal to be converted to binary.
d)
This allows the signal to be encoded.
7.
A square wave with values 0 and 1 is an example of a(n) ___________signal.
a)
digital
b)
analog
8.
A(n) analog signal is one that changes continuously.
a)
True
b)
False
9.
Before a signal is sent, it must be decoded.
a)
True
b)
False
10.
Sign language and written language are examples of signals used to communicate.
a)
True
b)
False
11.
How does noise affect a signal?
a)
It causes the signal to deteriorate.
b)
It amplifies the signal.
c)
It allows the signal to travel further.
d)
It changes the signal as it moves from one medium to another.
12.
Which correctly orders the steps of communication using signals?
a)
encode, transmit, decode
b)
transmit, encode, decode
c)
decode, transmit, encode
d)
transmit, decode, encode
13.
Which best compares the reliability of analog signals and digital signals?
a)
Only analog signals are reliable.
b)
Analog signals are more reliable than digital signals.
c)
Digital signals are more reliable than analog signals.
d)
Both types of signals are equally reliable.
14.
Which best describes binary numbers?
a)
a continuously changing wave
b)
a set of two discrete values
c)
a large array of values
d)
a set of four or five numbers
15.
In binary numbers, (1) is on and (__) is off.
a)
0
b)
2
c)
10
100 %
