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PCM vs DM: Key Concepts and Applications

Total questions: 20

Worksheet time: 10mins

Name
Class
Date
1.

What does PCM stand for?

a)

Phase Control Modulation

b)

Pulse Code Measurement

c)

Pulse Carrier Modulation

d)

Pulse Code Modulation

2.

Define Pulse Code Modulation (PCM).

a)

Pulse Code Modulation (PCM) is a method for compressing video signals.

b)

Pulse Code Modulation (PCM) is a technique for digitally representing analog signals by sampling and quantizing their amplitudes.

c)

Pulse Code Modulation (PCM) is a way to convert digital signals into analog waves.

d)

Pulse Code Modulation (PCM) is a technique for analog signal amplification.

3.

What does DM stand for?

a)

Data Management

b)

Direct Mail

c)

Direct Message

d)

Digital Marketing

4.

Define Delta Modulation (DM).

a)

Delta Modulation (DM) is a method of transmitting data over fiber optic cables.

b)

Delta Modulation (DM) encodes analog signals using multiple bits for each sample.

c)

Delta Modulation (DM) is a method of encoding analog signals by representing the difference between consecutive samples with a single bit.

d)

Delta Modulation (DM) is a technique for compressing digital images.

5.

List one advantage of PCM.

a)

High cost of installation

b)

Poor thermal insulation performance

c)

Energy storage and efficiency in temperature regulation.

d)

Limited applications in construction

6.

List one advantage of DM.

a)

Higher costs for data storage.

b)

Slower data retrieval times.

c)

Improved data organization and accessibility.

d)

Increased data redundancy and confusion.

7.

How does PCM improve signal quality?

a)

PCM enhances analog signals without conversion

b)

PCM improves signal quality by converting analog signals to digital, reducing noise and distortion.

c)

PCM increases noise levels in digital signals

d)

PCM is used solely for video signal processing

8.

What is a key disadvantage of DM compared to PCM?

a)

Better compatibility with older audio equipment.

b)

Simpler implementation in digital circuits.

c)

Higher power consumption leading to shorter battery life.

d)

Lower signal-to-noise ratio leading to poorer audio quality.

9.

In which application is PCM commonly used?

a)

Image processing tools

b)

Digital audio applications

c)

Text editing software

d)

Video streaming applications

10.

In which application is DM commonly used?

a)

Social media and communication applications

b)

Gaming applications

c)

Financial management tools

d)

Health and fitness trackers

11.

What is the primary purpose of PCM in communication systems?

a)

To convert analog signals into digital format for transmission.

b)

To store analog signals in a physical medium.

c)

To amplify digital signals for better clarity.

d)

To encrypt signals for secure transmission.

12.

How does DM simplify the encoding process?

a)

DM simplifies the encoding process by providing a structured framework that reduces complexity.

b)

DM eliminates the need for any framework in encoding.

c)

DM complicates the encoding process by adding more steps.

d)

DM makes encoding more difficult by increasing ambiguity.

13.

What type of signals is PCM best suited for?

a)

Digital video signals

b)

Analog audio signals

c)

Digital audio signals

d)

Analog video signals

14.

What is a common use of DM in audio processing?

a)

Digital Mixing

b)

Data Modulation

c)

Dynamic Range Compression

d)

Dynamic Music

15.

How does PCM handle noise in transmission?

a)

PCM reduces noise impact by converting analog signals to digital, allowing for better error detection and correction.

b)

PCM eliminates noise by increasing bandwidth.

c)

PCM uses analog signals to transmit data directly.

d)

PCM amplifies noise to improve signal strength.

16.

What is the bit rate typically associated with PCM?

a)

256,000 bits per second

b)

1,024,000 bits per second

c)

44,100 bits per second

d)

1,411,200 bits per second (for CD-quality PCM)

17.

What is the sampling rate in PCM?

a)

The sampling rate in PCM is typically 44.1 kHz for audio.

b)

The sampling rate in PCM is 96 kHz for high-resolution audio.

c)

The sampling rate in PCM is 22.05 kHz for audio.

d)

The sampling rate in PCM is 48 kHz for video.

18.

How does DM reduce the amount of data transmitted?

a)

DM reduces data transmission by encrypting data only.

b)

DM increases data transmission by duplicating data.

c)

DM reduces data transmission by compressing, filtering, and aggregating data.

d)

DM eliminates the need for data transmission altogether.

19.

What is a disadvantage of PCM in terms of bandwidth?

a)

PCM reduces bandwidth compared to analog signals.

b)

PCM has no impact on bandwidth requirements.

c)

PCM requires more bandwidth than the original analog signal.

d)

PCM uses less bandwidth than digital signals.

20.

In what scenario would you prefer DM over PCM?

a)

When audio quality is the highest priority.

b)

For applications with minimal processing power.

c)

In scenarios with high bandwidth requirements.

d)

In real-time applications requiring low latency.