Digital Technology

What are two reasons that digital storage of data is so reliable?

• Memory chips do not break easily.

• Digital data are easy to change.

• Copied data decrease in quality each time a copy is made.

• Digital data can usually be recovered even if the storage device stops working.

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What are two reasons digital storage of data is more secure than analog storage?

• Digital data can be encoded by a computer program.

• Digital data can be protected by a fingerprint or facial ID.

• Access to digital data requires a stronger password.

• Digital data are easy to change with a computer program.

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Which is a disadvantage of stored digital data?

• Hackers might steal it for personal gain.

• It's hard to accidentally delete it.

• It is rarely affected by computer viruses.

• It is easy to hide information inside other files.

Which advantage of stored digital data could also be a disadvantage?

• Stored digital data can be copied perfectly time after time.

• Stored digital data are reliable.

• Systems have been developed to protect stored digital data.

• Information in stored digital data can be quickly changed.

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Access to cloud computing is an advantage of transmitting information using digital signals. What is "the cloud"?

• Cables through which lasers send fast pulses of infrared light

• The pattern of wave pulses that produces the digital code

• A huge number of servers that communicate over a network

• All of the data downloaded to a user's computer

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Why can videos be streamed from one computer to another with excellent quality?

• They are transmitted using analog signals.

• They are transmitted using digital signals.

• They are received using either analog or digital signals.

• They are received using both analog and digital signals.

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What is one disadvantage of transmitting personal data using digital signals?

• The data could be accessed or stolen.

• The data can be changed by being transmitted.

• The data cannot be accessed by other computers.

• The data are easily changed into different data.

Why is strong cybersecurity needed when transmitting personal information using digital signals?

• It protects the personal information from being accessed or stolen.

• It can make it easier to transmit a computer virus.

• It boosts the signal, keeping it from becoming weaker.

• It keeps the digital signal from changing into an analog signal.

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Why can a digital signal send a message over a very long distance more reliably than an analog signal?

• The digital signal is less vulnerable to noise and more likely to arrive intact.

• The digital signal has waves that curve gradually and have many values.

• The digital signal could easily lose information because of noise.

• The digital signal loses quality when copied over and over.

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Andrew likes to purchase his school supplies online. What are two advantages of doing so?

• Because the information is sent digitally, there are an infinite number of different signals possible.

• All his personal information is sent digitally and does not change when transmitted.

• It is possible for his information to be accessed or stolen by a third party.

• Because the information is sent quickly, he can receive his order more quickly.

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