MCQOPTIONS
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MCQOPTIONS
This section includes 10 Mcqs, each offering curated multiple-choice questions to sharpen your Wireless & Mobile Communications Questions & Answers Packet Radio 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. |
In slotted ALOHA, time is divided into different length of time slots. |
| A. | True |
| B. | False |
| Answer» C. | |
| 3. |
The vulnerable period of slotted ALOHA is _________ packet duration. |
| A. | Two |
| B. | Ten |
| C. | One |
| D. | Three |
| Answer» D. Three | |
| 4. |
For pure ALOHA protocol, the vulnerable period is ___________ the packet duration. |
| A. | Double |
| B. | Equal |
| C. | Ten times |
| D. | Not equal |
| Answer» B. Equal | |
| 5. |
Pure ALOHA is __________ |
| A. | Modulation technique |
| B. | Multiple access technique |
| C. | Random access technique |
| D. | Spread spectrum technique |
| Answer» D. Spread spectrum technique | |
| 6. |
If is mean arrival rate and is the packet duration, then traffic occupancy of a packet radio network is equal to _________ |
| A. | |
| B. | / |
| C. | - |
| D. | <sup>2</sup> |
| Answer» B. / | |
| 7. |
For a PR multiple access technique, packet transmissions occur with __________ distribution. |
| A. | Poisson |
| B. | Gaussian |
| C. | Pearson |
| D. | Rayleigh |
| Answer» B. Gaussian | |
| 8. |
___________ 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 | |
| 9. |
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 | |
| 10. |
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 | |