Explore topic-wise MCQs in Wireless Mobile Communications.

This section includes 25 Mcqs, each offering curated multiple-choice questions to sharpen your Wireless Mobile Communications knowledge and support exam preparation. Choose a topic below to get started.

1.

__________ is the time required for a terminal to sense whether or not the channel is idle.

A. Propagation delay
B. Average delay
C. Detection delay
D. Time delay
Answer» D. Time delay
Discussion
2.

CSMA stands for _________

A. Carrier sense multiple access
B. Code sense multiple access
C. Carrier sense modulation access
D. Carry sense multiple access
Answer» B. Code sense multiple access
Discussion
3.

In slotted ALOHA, time is divided into different length of time slots.

A. True
B. False
Answer» C.
Discussion
4.

The vulnerable period of slotted ALOHA is _________ packet duration.

A. Two
B. Ten
C. One
D. Three
Answer» D. Three
Discussion
5.

For pure ALOHA protocol, the vulnerable period is ___________ the packet duration.

A. Double
B. Equal
C. Ten times
D. Not equal
Answer» B. Equal
Discussion
6.

Pure ALOHA is __________

A. Modulation technique
B. Multiple access technique
C. Random access technique
D. Spread spectrum technique
Answer» D. Spread spectrum technique
Discussion
7.

If λ is mean arrival rate and τ is the packet duration, then traffic occupancy of a packet radio network is equal to _________

A. λτ
B. λ/τ
C. λ-τ
D. λτ2
Answer» B. λ/τ
Discussion
8.

For a PR multiple access technique, packet transmissions occur with __________ distribution.

A. Poisson
B. Gaussian
C. Pearson
D. Rayleigh
Answer» B. Gaussian
Discussion
9.

___________ is defined as average number of messages successfully transmitted per unit time in packet radio multiple access technique.

A. Average delay
B. Figure of merit
C. Throughput
D. Efficiency
Answer» D. Efficiency
Discussion
10.

Packet radio uses _________ and __________ signals for perfect feedback.

A. Forward, reverse
B. ACK, NACK
C. Active, passive
D. Linear, non linear
Answer» C. Active, passive
Discussion
11.

In ___________ technique, many subscribers attempt to access a single channel in an uncoordinated manner.

A. Packet radio
B. Multiple access
C. Modulation
D. Spread spectrum
Answer» B. Multiple access
Discussion
12.

FOR_PURE_ALOHA_PROTOCOL,_THE_VULNERABLE_PERIOD_IS________THE_PACKET_DURATION.?$

A. Double
B. Equal
C. Ten times
D. Not equal
Answer» C. Ten times
Discussion
13.

In slotted ALOHA, time is divided into different length of time slots. State whether True or False.$

A. True
B. False
Answer» C.
Discussion
14.

The_vulnerable_period_of_slotted_ALOHA_is______packet_duration.$

A. Two
B. Ten
C. One
D. Three
Answer» D. Three
Discussion
15.

Discrete packet time technique, PRMA stands for _________

A. Packet reservation multiple access
B. Photo reflector multiple access
C. Proton reflector modulating access
D. Packet reflection multiple access
Answer» B. Photo reflector multiple access
Discussion
16.

Which of the following is based on time division multiplexing?

A. Slotted ALOHA
B. Pure ALOHA
C. CSMA
D. Reservation ALOHA
Answer» E.
Discussion
17.

_______ is the time required for a terminal to sense whether or not the channel is idle.

A. Propagation delay
B. Average delay
C. Detection delay
D. Time delay
Answer» D. Time delay
Discussion
18.

CSMA_stands_for________

A. Carrier sense multiple access
B. Code sense multiple access
C. Carrier sense modulation access
D. Carry sense multiple access
Answer» B. Code sense multiple access
Discussion
19.

Pure ALOHA is ____?

A. Modulation technique
B. Multiple access technique
C. Random access technique
D. Spread spectrum technique
Answer» D. Spread spectrum technique
Discussion
20.

If λ is mean arrival rate and τ is the packet duration, then traffic occupancy of a packet radio network is equal to ____$

A. λτ
B. λ/τ
C. λ-τ
D. λτ2
Answer» B. ‚âà√≠¬¨‚Ñ¢/‚âà√¨‚àö√´
Discussion
21.

For a PR multiple access technique, packet transmissions occur with _____ distribution.

A. Poisson
B. Gaussian
C. Pearson
D. Rayleigh
Answer» B. Gaussian
Discussion
22.

What is the time period during which the packets are susceptible to collisions with transmissions from other users?

A. Delay time
B. Latency period
C. Average delay time
D. Vulnerable period
Answer» E.
Discussion
23.

Packet radio has high spectral efficiency.

A. True
B. False
Answer» C.
Discussion
24.

Packet radio uses ____ and _____ signals for perfect feedback.

A. Forward, reverse
B. ACK, NACK
C. Active, passive
D. Linear, non linear
Answer» C. Active, passive
Discussion
25.

In ______ technique, many subscribers attempt to access a single channel in an uncoordinated manner.

A. Packet radio
B. Multiple access
C. Modulation
D. Spread spectrum
Answer» B. Multiple access
Discussion