Digital Information

Which of the following is true about analog information?

• It always needs encoding

• It is stored in binary format

• It doesn’t require memory

• It cannot be transmitted over long distances

In digital systems, what determines how dark or light a pixel is in a photo?

• The speed of the signal

• The type of device used

• The intensity of light hitting the detector

• The resolution of the image

Which of the following is a key advantage of digital information?

• It’s impossible to copy

• It’s made with physical waves

• It can be easily stored and transferred

• It doesn’t need electricity to function

Tags

NGSS.HS-PS4-2

Which type of information is easier to destroy?

• Digital information saved in cloud storage

• Analog information stored on paper

• Binary code on a computer

• Encrypted files on a hard drive

Tags

NGSS.HS-PS4-2

Analog signals need to be encoded before being transmitted.

• true

• false

Digital information often requires memory and storage.

• true

• false

Tags

NGSS.HS-PS4-2

A radio wave is an example of an analog signal.

• true

• false

Tags

NGSS.HS-PS4-5

In a digital image, a photodetector converts sound into pixel brightness.

• true

• false

Which three of the following characteristics are advantages of digital information storage and transmission?

• consumes less power than analog

• requires more bandwidth

• less vulnerable to distortion

• can be encrypted for protection

Tags

NGSS.HS-PS4-2

By preference or by law, certain documents are accepted only in their original printed form, and not when they are transmitted electronically. Which is the most

serious drawback of the electronic transmission of a document?

• reliability of the electronic transmission

• speed of the electronic transmission

• difficulty in accessing the electronic form of the document

• security of the electronic document or its transmission

Tags

NGSS.HS-PS4-2