Data Communication MCQs with Answers
Practice important Data Communication MCQs with answers and explanations.
Chapter: 177
Q2641:
What does CDMA stand for?
A. Code Division Multiple Access
B. Code Detection Multiple Access
C. Channel Division Multiple Access
D. Central Data Multiple Allocation
Correct Answer:
A
Chapter: 177
Q2642:
Which multiple access method uses bandpass filters to control transmitter frequencies?
A. FDMA
B. TDMA
C. CDMA
D. CSMA
Correct Answer:
A
Chapter: 177
Q2643:
Fill in the blank: ______ is suitable for analog signals and divides bandwidth into different frequencies.
A. TDMA
B. CSMA
C. FDMA
D. CDMA
Correct Answer:
C
Chapter: 177
Q2644:
In FDMA, each station's allocated frequency band is ______.
A. Temporarily assigned
B. Dynamically shifted
C. Permanently reserved
D. Randomly selected
Correct Answer:
C
Chapter: 177
Q2645:
Which access method does not use frequency division or time division?
A. TDMA
B. FDMA
C. CSMA/CD
D. CDMA
Correct Answer:
D
Chapter: 177
Q2646:
Which of the following is NOT a characteristic of FDMA?
A. Fixed frequency allocation
B. Bandpass filtering
C. Shared time slot access
D. Continuous transmission
Correct Answer:
C
Chapter: 177
Q2647:
Which protocol is best for real-time applications that need continuous signal?
A. TDMA
B. CDMA
C. FDMA
D. CSMA/C
Correct Answer:
C
Chapter: 177
Q2648:
In which access method do all stations transmit simultaneously using unique codes?
A. TDMA
B. FDMA
C. CDMA
D. CSMA/C
Correct Answer:
C
Chapter: 177
Q2649:
What is the main benefit of CDMA?
A. Higher bandwidth
B. Higher delay
C. Better power filtering
D. Simultaneous access
Correct Answer:
D
Chapter: 177
Q2650:
In CDMA, which of the following ensures signals don't interfere with each other?
A. Time slots
B. Frequency division
C. Code division
D. Band sharing
Correct Answer:
C
Chapter: 177
Q2651:
Which method uses unique codes to differentiate signals?
A. TDMA
B. FDMA
C. CDMA
D. CSMA/C
Correct Answer:
C
Chapter: 178
Q2652:
What does FDMA stand for?
A. Frequency Dependent Multiplex Access
B. Frequency Data Multiplex Access
C. Frequency Division Multiple Access
D. Frequency Distribution Multiple Access
Correct Answer:
C
Chapter: 178
Q2653:
In FDMA, the available bandwidth is divided into ______.
A. time slots
B. different frequencies
C. channels of code
D. speed levels
Correct Answer:
B
Chapter: 178
Q2654:
Which technique assigns different time slots to users?
A. FDMA
B. TDMA
C. CDMA
D. SDMA
Correct Answer:
B
Chapter: 178
Q2655:
What is the main difference between FDMA and TDMA?
A. FDMA uses time slots, TDMA uses frequencies
B. FDMA and TDMA are the same
C. FDMA uses frequencies, TDMA uses time slots
D. FDMA uses code sharing, TDMA uses time sharing
Correct Answer:
C
Chapter: 178
Q2656:
Each user gets a unique frequency band in ______.
A. TDMA
B. FDMA
C. CDMA
D. SDMA
Correct Answer:
B
Chapter: 178
Q2657:
In TDMA, users transmit ______.
A. at the same frequency and time
B. at different frequencies
C. at the same frequency but different times
D. at random times
Correct Answer:
C
Chapter: 178
Q2658:
FDMA is mainly used in which of the following systems?
A. Wi-Fi
B. Bluetooth
C. Analog cellular systems
D. Digital satellite radio
Correct Answer:
C
Chapter: 178
Q2659:
TDMA improves bandwidth efficiency by ______.
A. sharing frequency across all users
B. giving users continuous access
C. using different hardware devices
D. assigning time slots to users
Correct Answer:
D
Chapter: 178
Q2660:
Fill in the blank: ______ allows multiple users to share the same frequency channel by dividing the signal into different time slots.
A. FDMA
B. TDMA
C. CDMA
D. OFDM
Correct Answer:
B