Data Communication MCQs with Answers
Practice important Data Communication MCQs with answers and explanations.
Multiple Choice Questions
Q1081: What happens when the binary data element changes in FSK?
- A: Amplitude changes
- B: Frequency changes
- C: Phase changes
- D: Data rate doubles
View Answer
B
Q1082: Which of the following uses FSK for communication?
- A: Wi-Fi
- B: Low-speed modems
- C: TV broadcasting
- D: AM radio
View Answer
B
Q1083: What is the key characteristic of the carrier signal in Binary FSK?
- A: Two distinct frequencies
- B: Multiple phases
- C: Variable amplitude
- D: Constant bandwidth
View Answer
A
Q1084: Fill in the blank: FSK provides better _______ performance compared to ASK.
- A: complexity
- B: noise immunity
- C: hardware cost
- D: bandwidth usage
View Answer
B
Q1085: The carrier signal frequency for Binary FSK is _______ for binary 1 compared to binary 0.
- A: the same
- B: lower
- C: higher
- D: zero
View Answer
C
Q1086: In Frequency Shift Keying (FSK), which parameter is varied to represent data?
- A: Amplitude
- B: Frequency
- C: Phase
- D: Bit rate
View Answer
B
Q1087: What is the formula to calculate the carrier frequency in FSK when bandwidth is given?
- A: B = 2 × (f1 + f2)
- B: B = f1 − f2
- C: B = 2 × Δf
- D: B = 2 × (1 + d)
View Answer
C
Q1088: Fill in the blank: FSK uses _______ frequencies to represent binary 0 and 1.
- A: two
- B: three
- C: one
- D: multiple
View Answer
A
Q1089: What is the key advantage of FSK over ASK?
- A: Better noise immunity
- B: Lower bandwidth usage
- C: Simple implementation
- D: Faster modulation
View Answer
A
Q1090: If an available bandwidth is 100 kHz spanning from 200 kHz to 300 kHz, what is the carrier frequency for binary 0 and 1 in FSK with d = 1?
- A: 200 kHz and 300 kHz
- B: 150 kHz and 250 kHz
- C: 220 kHz and 280 kHz
- D: 250 kHz and 300 kHz
View Answer
A