Digital vs Analog: Signal Reliability Quiz

Oliver is learning about signals in his electronics class. He learned that a digital signal is best described as a signal that (a)   .

• A signal that varies continuously

• A signal that represents data using discrete values

• A signal that is always analog

• A signal that cannot be transmitted

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Why are digital signals considered more reliable than analog signals?

• They are less affected by noise and interference

• They are easier to generate

• They require more bandwidth

• They are always faster

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(a)   is a key advantage of digital signals over analog signals in terms of data transmission.

• Digital signals can be easily compressed

• Digital signals are always cheaper

• Digital signals require no power

• Digital signals are always slower

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Match the following scenarios with the suitable type of signal for minimal loss of quality over long distances.

• Cost-effective digital communication

• Digital, because it is cheaper

• Continuous signal transmission over short distances

• Analog, because it is continuous

• Natural sound reproduction in a local area

• Digital, because it can be easily corrected for errors

• Long-distance transmission with error correction

• Analog, because it is more natural

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The process of encoding information in digital signals contributes to their reliability by (a)  

• Encoding makes the signals more com
• Encoding allows for error detection
• Encoding reduces the speed of trans
• Encoding increases the cost of tran

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In what way does the use of digital signals impact the quality of audio and video transmissions compared to analog signals?

• Digital signals degrade more over distance

• Digital signals maintain quality better due to error correction

• Analog signals are always clearer

• Analog signals are more reliable

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Match the following challenges with their descriptions in the context of converting analog signals to digital signals.

• Capturing all necessary details by sampling frequently

• Sampling the analog signal at a high enough rate to capture all necessary information

• Maintaining a seamless transition in digital representation

• Ensuring the digital signal is continuous

• Decreasing the amplitude or frequency of the signal

• Making the digital signal analog

• Converting digital data back to its original form

• Reducing the size of the analog signal

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Evaluate the statement: "Digital signals are inherently more secure than analog signals." Provide reasoning to support your evaluation.

• True, because digital signals can be encrypted

• False, because analog signals are harder to intercept

• True, because digital signals are always faster

• False, because digital signals are more complex

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