ICT C3.1 - Videos (1-5)

Back in ancient times, humans communicated first through

• Text

• SMS

• Pictograms

• Videos

What was invented first ?

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What was invented before the radio?

• Television

• Telephone

• Typewriter

• Cell phone

Which of the below is not a portable device?

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If Paul was to send a message 'HELLO' to his friend, when this is translated to cipher text this is called?

• Encryption

• Decryption

• Inspection

Is the cipher text readable?

• True

• False

Which type of waves does a radar transmit?

• Satellite

• Radio

• Sound

Does radar technology helps in identifying enemy airplanes or missiles in the military?

• True

• False

Does the auto brake technology use a radar antenna at the front of a vehicle?

• True

• False

For which of the following is the radar used?

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