MCQOPTIONS
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MCQOPTIONS
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 | |
| 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 | |
| 3. |
In slotted ALOHA, time is divided into different length of time slots. |
| A. | True |
| B. | False |
| Answer» C. | |
| 4. |
The vulnerable period of slotted ALOHA is _________ packet duration. |
| A. | Two |
| B. | Ten |
| C. | One |
| D. | Three |
| Answer» D. Three | |
| 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 | |
| 6. |
Pure ALOHA is __________ |
| A. | Modulation technique |
| B. | Multiple access technique |
| C. | Random access technique |
| D. | Spread spectrum technique |
| Answer» D. Spread spectrum technique | |
| 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 | |
| 8. |
For a PR multiple access technique, packet transmissions occur with __________ distribution. |
| A. | Poisson |
| B. | Gaussian |
| C. | Pearson |
| D. | Rayleigh |
| Answer» B. Gaussian | |
| 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 | |
| 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 | |
| 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 | |
| 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 | |
| 13. |
In slotted ALOHA, time is divided into different length of time slots. State whether True or False.$ |
| A. | True |
| B. | False |
| Answer» C. | |
| 14. |
The_vulnerable_period_of_slotted_ALOHA_is______packet_duration.$ |
| A. | Two |
| B. | Ten |
| C. | One |
| D. | Three |
| Answer» D. Three | |
| 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 | |
| 16. |
Which of the following is based on time division multiplexing? |
| A. | Slotted ALOHA |
| B. | Pure ALOHA |
| C. | CSMA |
| D. | Reservation ALOHA |
| Answer» E. | |
| 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 | |
| 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 | |
| 19. |
Pure ALOHA is ____? |
| A. | Modulation technique |
| B. | Multiple access technique |
| C. | Random access technique |
| D. | Spread spectrum technique |
| Answer» D. Spread spectrum technique | |
| 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√´ | |
| 21. |
For a PR multiple access technique, packet transmissions occur with _____ distribution. |
| A. | Poisson |
| B. | Gaussian |
| C. | Pearson |
| D. | Rayleigh |
| Answer» B. Gaussian | |
| 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. | |
| 23. |
Packet radio has high spectral efficiency. |
| A. | True |
| B. | False |
| Answer» C. | |
| 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 | |
| 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 | |