Data Communication MCQs with Answers
Practice important Data Communication MCQs with answers and explanations.
Chapter: 80
Q1061:
Binary ASK requires a bandwidth of 100 kHz for a signal with a data rate of _______.
A. 50 kbps
B. 100 kbps
C. 200 kbps
D. 25 kbps
Correct Answer:
B
Chapter: 80
Q1062:
When implementing Binary ASK, the available bandwidth is defined as _______.
A. Carrier range
B. Data range
C. Frequency difference
D. Amplitude threshold
Correct Answer:
C
Chapter: 80
Q1063:
What is the maximum data rate achievable with a 100 kHz bandwidth in Binary ASK?
A. 25 kbps
B. 50 kbps
C. 100 kbps
D. 200 kbps
Correct Answer:
C
Chapter: 80
Q1064:
Fill in the blank: Binary ASK, also known as _______, is a form of amplitude modulation.
A. On-Off Keying
B. Frequency Modulation
C. Phase Modulation
D. Data Modulation
Correct Answer:
A
Chapter: 81
Q1065:
In Frequency Shift Keying (FSK), which characteristic of the carrier signal is varied?
A. Amplitude
B. Frequency
C. Phase
D. Bit rate
Correct Answer:
B
Chapter: 81
Q1066:
What remains constant in FSK during modulation?
A. Amplitude and Phase
B. Frequency and Amplitude
C. Phase and Data Rate
D. Signal Rate and Bandwidth
Correct Answer:
A
Chapter: 81
Q1067:
Binary FSK uses _______ frequencies to represent binary 0 and 1.
A. one
B. two
C. three
D. four
Correct Answer:
B
Chapter: 81
Q1068:
Which modulation technique is more resistant to noise compared to ASK?
A. Amplitude Modulation (AM)
B. Frequency Shift Keying (FSK)
C. Phase Modulation (PM)
D. On-Off Keying (OOK)
Correct Answer:
B
Chapter: 81
Q1069:
The frequency of the modulated signal in FSK changes when _______.
A. the amplitude varies
B. the phase varies
C. the data element changes
D. the bandwidth changes
Correct Answer:
C
Chapter: 81
Q1070:
Binary Frequency Shift Keying (BFSK) is commonly used in _______.
A. AM radio
B. Wi-Fi
C. telemetry
D. TV broadcasting
Correct Answer:
C
Chapter: 81
Q1071:
Fill in the blank: FSK is a _______ modulation technique where the carrier frequency changes with the binary data.
A. phase
B. digital
C. amplitude
D. continuous
Correct Answer:
B
Chapter: 81
Q1072:
What is the primary advantage of FSK over ASK?
A. Higher data rate
B. Better noise immunity
C. Lower power consumption
D. Reduced bandwidth usage
Correct Answer:
B
Chapter: 81
Q1073:
In FSK, what happens when a binary 0 is transmitted?
A. A low frequency is used
B. A high frequency is used
C. The amplitude drops
D. The phase shifts
Correct Answer:
A
Chapter: 81
Q1074:
What is a disadvantage of Binary FSK?
A. Higher bandwidth usage
B. Low noise immunity
C. Complex hardware
D. High power consumption
Correct Answer:
A
Chapter: 81
Q1075:
Which parameter determines the bandwidth requirement in FSK?
A. Carrier frequency
B. Data rate
C. Amplitude modulation
D. Phase shift
Correct Answer:
B
Chapter: 81
Q1076:
Fill in the blank: The _______ of the modulated signal remains constant for one signal element in FSK.
A. amplitude
B. phase
C. frequency
D. noise
Correct Answer:
A
Chapter: 81
Q1077:
What type of modulation is used when the carrier frequency changes between two predefined levels?
A. Amplitude Modulation
B. Binary FSK
C. Phase Modulation
D. Quadrature Modulation
Correct Answer:
B
Chapter: 81
Q1078:
FSK is most commonly used in _______.
A. DSL modems
B. Audio broadcasting
C. Wireless communication
D. Ethernet
Correct Answer:
C
Chapter: 81
Q1079:
In Binary FSK, the bandwidth required is proportional to _______.
A. Amplitude
B. Phase
C. Signal Rate
D. Carrier Frequency
Correct Answer:
C
Chapter: 81
Q1080:
The simplest form of FSK is known as _______.
A. Continuous Wave Modulation
B. Binary FSK
C. Quadrature Modulation
D. Single Carrier Modulation
Correct Answer:
B