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Modulation Classification Quiz

Total questions: 20

Worksheet time: 10mins

Name
Class
Date
1.

Why do companies like Qualcomm and MediaTek use ML-based modulation classification inside smartphone chipsets?

a)

To improve battery charging speed

b)

To detect and adapt to changing wireless channel conditions

c)

To increase phone brightness

d)

To reduce phone weight

2.

DRDO uses modulation classification mainly for:

a)

Radar/communication interception and signal intelligence

b)

Designing new mobile apps

c)

Smart agriculture monitoring

d)

Manufacturing car engines

3.

How does modulation classification contribute to the efficiency of communication systems?

a)

By increasing the cost of devices

b)

By reducing the number of users on a network

c)

By simplifying hardware requirements

d)

By enabling faster data transmission rates

4.

In telecom companies like Jio or Airtel, ML-based signal classification helps primarily in:

a)

Deciding customer data pack prices

b)

Network optimization and interference management

c)

Hiring employees

d)

Creating advertisements

5.

Why is Linear Regression NOT used in industry for modulation classification?

a)

It is illegal to use

b)

It predicts continuous values, not categories

c)

It consumes too much power

d)

It requires expensive hardware

6.

In ISRO ground stations, ML-based signal classification can help:

a)

Monitor astronaut heart rate

b)

Automatically detect the modulation of received satellite signals

c)

Design spacecraft colors

d)

Estimate fuel consumption of rockets

7.

Which global company uses ML-based modulation detection in Wi-Fi chipsets?

a)

Starbucks

b)

Intel

c)

Tessolve

d)

Bosch

8.

In automatic modulation classification (AMC), which feature is most useful for distinguishing PSK signals?

a)

Amplitude envelope

b)

Instantaneous phase

c)

Zero-crossing rate

d)

Crest factor

9.

The constellation diagram of a signal is most useful for distinguishing between:

a)

Analog modulations only

b)

Digital modulations like BPSK, QPSK, QAM

c)

Sensor noise types

d)

Antenna types

10.

Which company uses adaptive modulation (QPSK, 16-QAM, 64-QAM) in LTE modem chipsets to improve spectral efficiency?

a)

Qualcomm

b)

Sony

c)

Nokia

d)

DRDO

11.

Which modulation technique is widely used in DVB-T/DVB-T2 digital TV broadcasting?

a)

QPSK and QAM

b)

ASK

c)

FSK

d)

CSS

12.

Why is machine learning preferred over traditional feature-based methods for modulation classification?

a)

ML requires no data

b)

ML works better in noisy and fading environments

c)

ML eliminates modulation

d)

ML avoids signal processing

13.

Which feature is most useful for distinguishing AM and FM signals?

a)

Symbol rate

b)

Amplitude pattern and frequency variation

c)

Packet size

d)

Bit length

14.

Which stage of the ML pipeline removes unwanted noise from raw signals?

a)

Preprocessing

b)

Classification

c)

Training

d)

Labelling

15.

FFT-based features mainly help in analyzing which domain?

a)

Frequency domain

b)

Time Domain

c)

Spatial Domain

d)

Bit Domain

16.

Which dataset is widely used as a benchmark for modulation classification research?

a)

RadioML

b)

ImageNet

c)

COCO

d)

MNIST

17.

Why is normalization important in ML-based signal classification?

a)

To increase noise

b)

To equalize feature scales

c)

To reduce dataset size

d)

To change modulation type

18.

Which modulation scheme offers higher data rate but requires better SNR?

a)

256-QAM

b)

ASK

c)

QPSK

d)

FSK

19.

Which industry sector heavily relies on modulation classification for signal intelligence (SIGINT)?

a)

Defence

b)

Healthcare

c)

Automotive

d)

Agriculture

20.

Which job role is most closely associated with ML-based modulation classification?

a)

Web Developer

b)

Signal Processing Engineer

c)

UI Designer

d)

Database Administrator