Understanding Signals: Analog vs Digital

What is the primary difference between an analog signal and a digital signal?

• Analog signals are continuous, while digital signals are discrete.

• Digital signals are continuous, while analog signals are discrete.

• Analog signals are used only in computers, while digital signals are used in nature.

• Digital signals are always represented by sine waves.

Which of the following is an example of an analog signal?

• Data stored on a CD

• Temperature readings from a mercury thermometer

• Text messages sent via a smartphone

• Binary code in a computer

What is the main advantage of digital signals over analog signals?

• They are more susceptible to noise.

• They can be easily processed and transmitted without degradation.

• They require less bandwidth.

• They are always continuous.

Which device converts an analog signal to a digital signal?

• Amplifier

• Modulator

• Analog-to-Digital Converter (ADC)

• Digital-to-Analog Converter (DAC)

What is the process of converting a digital signal back into an analog signal called?

• Sampling

• Quantization

• Modulation

• Reconstruction

Which of the following is a disadvantage of analog signals?

• They are less susceptible to noise.

• They are difficult to store and process.

• They are always more accurate than digital signals.

• They require less bandwidth for transmission.

What is the primary use of a Digital-to-Analog Converter (DAC)?

• To convert digital audio signals into sound waves for speakers.

• To amplify analog signals.

• To reduce noise in digital signals.

• To sample analog signals.

Which of the following is a characteristic of a digital signal?

• It has infinite resolution.

• It is represented by binary values (0s and 1s).

• It is always continuous.

• It cannot be processed by computers.

What is one advantage of analog signals over digital signals?

• Analog signals are more resistant to noise.

• Analog signals can represent data with infinite resolution.

• Analog signals are easier to process using computers.

• Analog signals require less bandwidth for transmission

What is a key reason analog signals are preferred in certain real-time systems?

• They can be processed faster by digital computers.

• They provide continuous data without the need for sampling or quantization.

• They are more compatible with modern digital devices.

• They require less power to transmit over long distances.