Question 1

Which of the following best describes a digital signal?

Accepted Answer

A signal that is represented by discrete values

Answer

A signal that contains only noise

Answer

A signal that is continuous over time

Answer

A signal that can only represent one value

Question 2

What is considered 'noise' in the context of signals?

Accepted Answer

Unwanted interference that distorts the original signal

Answer

A type of digital signal

Answer

A helpful component of the signal

Answer

The main data being transmitted

Question 3

What is a common example of an analog signal?

Accepted Answer

A continuous sound wave from a guitar

Answer

A text message

Answer

A computer file

Answer

A digital photograph

Question 4

Which of the following statements about analog and digital signals is true?

Accepted Answer

Analog signals can be affected by noise more than digital signals

Answer

Digital signals are immune to noise

Answer

Digital signals can vary continuously

Answer

Analog signals are always more accurate

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