Reflection Connection Week 31

What is a digital signal?

• A signal that varies continuously over time

• A signal that has discrete values

• A signal that is always analog

• A signal that cannot be converted

Which of the following is a characteristic of an analog signal?

• It has discrete levels

• It is represented by binary numbers

• It varies continuously over time

• It is immune to noise

What is the primary purpose of signal conversion techniques?

• To increase the frequency of signals

• To convert signals from one form to another

• To eliminate noise completely

• To make signals analog

Which of the following is a common method for converting analog signals to digital signals?

• Frequency modulation

• Amplitude modulation

• Pulse code modulation

• Phase modulation

What is noise in signal transmission?

• A desired signal component

• An unwanted disturbance

• A type of digital signal

• A method of signal conversion

Which of the following is an application of digital signals?

• AM radio broadcasting

• Vinyl record playback

• Digital audio recording

• Analog television

In what scenario is an analog signal preferred over a digital signal?

• When high precision is required

• When data needs to be compressed

• When signal processing is needed

• When a natural representation of data is needed

How does noise affect digital signals compared to analog signals?

• Digital signals are more affected by noise

• Analog signals are less affected by noise

• Digital signals are less affected by noise

• Both are equally affected by noise

What is the role of an analog-to-digital converter (ADC)?

• To convert digital signals to analog signals

• To convert analog signals to digital signals

• To amplify analog signals

• To filter digital signals

Which of the following best describes the process of quantization in signal conversion?

• Increasing the frequency of a signal

• Assigning discrete values to a continuous signal

• Filtering out noise from a signal

• Modulating the amplitude of a signal