Information technologies

What is a signal?

• Noise

• Binary numbers

• An unwanted modification

• A piece of information

The image shows a

• digital signal + noise

• analog signal

• digital signal

• analog signal + noise

Speakers are

• analog devices

• digital devices

• signals

• none of the options

Digital signals are

• continuous

• 0 and 1

• discrete

• Noises

An example of sharing information is

• Opening the door

• Waving at your freind

• drinking a cup of juice

• Running

Signals can be transmitted using

• A fiber optic cable

• All Waves

• Noises

• Drinking a cup of water

A fiber optic cable is made of the

• Core

• Core and the cladding

• Cladding

What is true?

• Digital signals are continuous

• The on is similar to 0 and the off is similar to 1

• The on is similar to 1 and the off is similar to 0

• A noise is a piece of information