Data Communication MCQs with Answers
Practice important Data Communication MCQs with answers and explanations.
Chapter: 179
Q2681:
CDMA is also known as ______.
A. Code Sharing Network
B. Time Split Protocol
C. Frequency Switch Access
D. Spread Spectrum Technique
Correct Answer:
D
Chapter: 179
Q2682:
In CDMA, each user's signal is multiplied by a unique ______.
A. bit stream
B. carrier signal
C. spreading code
D. tone frequency
Correct Answer:
C
Chapter: 179
Q2683:
Which system uses the concept of spreading the signal over a wide bandwidth?
A. FDMA
B. CDMA
C. TDMA
D. SDMA
Correct Answer:
B
Chapter: 179
Q2684:
Which access method increases resistance to interference and eavesdropping?
A. TDMA
B. FDMA
C. CDMA
D. OFDM
Correct Answer:
C
Chapter: 179
Q2685:
CDMA works by combining user data with ______.
A. encrypted signals
B. low pass filters
C. spreading codes
D. digital multiplexers
Correct Answer:
C
Chapter: 179
Q2686:
CDMA uses which of the following to enable secure communication?
A. Encryption
B. Frequency hopping
C. Unique codes
D. Direct modulation
Correct Answer:
C
Chapter: 179
Q2687:
Fill in the blank: In CDMA, ______ multiple access is achieved by assigning a unique code to each user.
A. code-based
B. time-based
C. frequency-based
D. channel-based
Correct Answer:
A
Chapter: 179
Q2688:
CDMA systems use which form of communication?
A. time-shared
B. frequency exclusive
C. code-multiplexed
D. data-only
Correct Answer:
C
Chapter: 179
Q2689:
Which is a benefit of CDMA?
A. Low complexity
B. No bandwidth usage
C. High capacity and efficient use of spectrum
D. Limited user access
Correct Answer:
C
Chapter: 179
Q2690:
CDMA differs from FDMA in that ______.
A. multiple channels are assigned unique frequencies
B. only one channel occupies the entire bandwidth of the link
C. users are assigned separate time slots
D. it uses multiple antennas
Correct Answer:
B
Chapter: 179
Q2691:
In CDMA, how is the bandwidth of the link utilized?
A. Only a portion is used
B. Multiple frequencies are assigned
C. One channel uses the entire bandwidth
D. A time slot is used per user
Correct Answer:
C
Chapter: 179
Q2692:
Which multiple access method allows one channel to use the entire bandwidth of the link?
A. FDMA
B. TDMA
C. CDMA
D. OFDM
Correct Answer:
C
Chapter: 179
Q2693:
CDMA differs from TDMA in that ______.
A. all stations send data in assigned time slots
B. all stations can send data simultaneously
C. frequency is divided among users
D. channels are assigned by routers
Correct Answer:
B
Chapter: 179
Q2694:
Which technique allows all users to transmit data at the same time using different codes?
A. FDMA
B. TDMA
C. CDMA
D. FDM
Correct Answer:
C
Chapter: 179
Q2695:
In FDMA, bandwidth is divided into ______.
A. unique time slots
B. individual codes
C. separate frequency channels
D. data packets
Correct Answer:
C
Chapter: 179
Q2696:
TDMA differs from CDMA because it uses ______ for access.
A. shared codes
B. time slots
C. frequency bands
D. data queues
Correct Answer:
B
Chapter: 179
Q2697:
CDMA does not require which of the following to separate users?
A. time slots
B. codes
C. frequencies
D. antennas
Correct Answer:
A
Chapter: 179
Q2698:
Fill in the blank: In CDMA, ______ is used instead of dividing the bandwidth by time or frequency.
A. code division
B. time division
C. frequency switching
D. space division
Correct Answer:
A
Chapter: 179
Q2699:
Which access method does NOT use time-sharing to separate users?
A. TDMA
B. CDMA
C. FDMA
D. WDMA
Correct Answer:
B
Chapter: 179
Q2700:
CDMA differs from FDMA and TDMA by allowing all users to use ______.
A. different routers
B. separate time frames
C. the same bandwidth simultaneously
D. separate channels
Correct Answer:
C