Communication Technology

What is the main purpose of encoding and decoding signals?

• To convert analog signals into digital formats only.

• To compress data for storage purposes.

• To enhance the visual quality of images during transmission.

• The main purpose of encoding and decoding signals is to facilitate efficient communication and ensure data integrity.

How can analog signals be encoded and decoded?

• Analog signals can be encoded using modulation techniques and decoded through demodulation.

• Analog signals can be encoded using binary code.

• Analog signals are only transmitted as digital signals.

• Analog signals do not require any decoding process.

What is an example of a simple technology that can decode analog signals?

• Digital camera

• Television set

• Smartphone

• Radio receiver

Why are digital signals preferred for reliable transmission?

• Digital signals cannot be encrypted effectively.

• Digital signals are preferred for reliable transmission due to their resistance to noise, ability to be regenerated, and support for compression and encryption.

• Digital signals are slower than analog signals.

• Analog signals are easier to compress than digital signals.

What happens to digital signals when the noise level is too high?

• Digital signals are always transmitted perfectly regardless of noise.

• Noise has no effect on digital signals.

• Digital signals may become corrupted or lost due to excessive noise.

• Digital signals become stronger with high noise levels.

Can people decode simple digital signals?

• No, digital signals are too complex for anyone to decode.

• Yes, people can decode simple digital signals.

• No, only machines can decode digital signals.

• Yes, but only if they are trained professionals.

How does the storage of information differ between analog and digital forms?

• Digital storage is less efficient than analog storage in preserving data.

• Analog storage uses continuous signals, while digital storage uses discrete binary values.

• Analog storage uses binary values, while digital storage uses continuous signals.

• Both analog and digital storage use continuous signals for information.

What is a common example of analog sound storage?

• Vinyl records

• Cassette tapes

• Digital audio files

• CDs

How do computers store sound information compared to analog methods?

• Computers store sound digitally using discrete samples and binary values, while analog methods use continuous waveforms.

• Computers convert sound into physical vibrations for storage.

• Computers store sound using continuous waveforms like analog methods.

• Analog methods store sound in discrete samples and binary values.

Why might someone choose to use digital signals over analog signals?

• Digital signals offer better noise resistance, efficiency in storage and transmission, and support for advanced processing.

• Digital signals are always more expensive than analog signals.

• Analog signals provide better sound quality in all cases.

• Digital signals require more bandwidth than analog signals.