Information Technologies-Unit 3 Module 3 TEST

Light waves, radio waves, and microwaves are examples of electromagnetic waves.

• True
• False

Analog signals are _________ affected by noise than digital signals.

• More
• Less

Which is an example of a signal being encoded?

• reading braille
• writing a word in Morse code
• hearing sound from a radio
• receiving an email

Computers use digital information that is encoded as ________________numbers.

• digital
• binary
• singular

Digital signals:

• can only be stored on computers
• consist of only two values
• are what is stored by camera film

Which best explains why the receiver of a signal must understand the code or language being used?

• This allows the signal to be decoded
• This allows the signal to be transmitted.
• This allows the signal to be converted to binary.
• This allows the signal to be encoded.

A square wave with values 0 and 1 is an example of a(n) ___________signal.

• digital
• analog

A(n) analog signal is one that changes continuously.

• True
• False

Before a signal is sent, it must be decoded.

• True
• False

Sign language and written language are examples of signals used to communicate.

• True
• False