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This section includes 18 Mcqs, each offering curated multiple-choice questions to sharpen your Digital Communications knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
For a throughput value of 0.20 to 0.67, which has less average delay? |
| A. | S-ALOHA |
| B. | Pure ALOHA |
| C. | R-ALOHA |
| D. | None of the mentioned |
| Answer» D. None of the mentioned | |
| 2. |
For a throughput of value less than 0.20, which has less average delay? |
| A. | S-ALOHA |
| B. | Pure ALOHA |
| C. | R-ALOHA |
| D. | None of the mentioned |
| Answer» B. Pure ALOHA | |
| 3. |
In which technique, packet size are constant? |
| A. | Pure Aloha |
| B. | Slotted Aloha |
| C. | Pure & Slotted Aloha |
| D. | None of the mentioned |
| Answer» B. Slotted Aloha | |
| 4. |
In Aloha technique, the re-transmission takes place immediately. |
| A. | True |
| B. | False |
| Answer» C. | |
| 5. |
The minimum packet size of Ethernet is |
| A. | 81 bytes |
| B. | 75 bytes |
| C. | 72 bytes |
| D. | 64 bytes |
| Answer» D. 64 bytes | |
| 6. |
IN_WHICH_TECHNIQUE,_PACKET_SIZE_ARE_CONSTANT??$ |
| A. | Pure Aloha |
| B. | Slotted Aloha |
| C. | Pure & Slotted Aloha |
| D. | None of the mentioned |
| Answer» B. Slotted Aloha | |
| 7. |
For a throughput value of 0.20 to 0.67, which has less average delay?$ |
| A. | S-ALOHA |
| B. | Pure ALOHA |
| C. | R-ALOHA |
| D. | None of the mentioned |
| Answer» D. None of the mentioned | |
| 8. |
For_a_throughput_of_value_less_than_0.20,_which_has_less_average_delay?$ |
| A. | S-ALOHA |
| B. | Pure ALOHA |
| C. | R-ALOHA |
| D. | None of the mentioned |
| Answer» B. Pure ALOHA | |
| 9. |
For a higher throughput value which method works efficiently? |
| A. | S-ALOHA |
| B. | Pure ALOHA |
| C. | R-ALOHA |
| D. | None of the mentioned |
| Answer» D. None of the mentioned | |
| 10. |
Which method is better suited for large population? |
| A. | Straight polling |
| B. | Binary tree search |
| C. | Straight polling & Binary tree search |
| D. | None of the mentioned |
| Answer» C. Straight polling & Binary tree search | |
| 11. |
Binary tree search is used for |
| A. | Multiple users |
| B. | Single users |
| C. | Single & Multiple users |
| D. | None of the mentioned |
| Answer» B. Single users | |
| 12. |
In Aloha technique, the re-transmission takes place immediately? |
| A. | True |
| B. | False |
| Answer» C. | |
| 13. |
As channel capacity increases, channel throughput |
| A. | Increases |
| B. | Decreases |
| C. | Remains the same |
| D. | None of the mentioned |
| Answer» B. Decreases | |
| 14. |
Bit stuffing is done by inserting _____, after ____ consecutive ones. |
| A. | Zero, seven |
| B. | Zero, five |
| C. | One, seven |
| D. | One, five |
| Answer» B. Zero, five | |
| 15. |
The interface between the ring and the stations are passive. |
| A. | True |
| B. | False |
| Answer» C. | |
| 16. |
The maximum packet size of Ethernet is |
| A. | 1426 bytes |
| B. | 1526 bytes |
| C. | 1256 bytes |
| D. | 1626 bytes |
| Answer» C. 1256 bytes | |
| 17. |
LAN uses _________ cables. |
| A. | Low bandwidth |
| B. | High bandwidth |
| C. | Low & High bandwidth |
| D. | None of the mentioned |
| Answer» C. Low & High bandwidth | |
| 18. |
A local area network can be used to interconnect |
| A. | Computers |
| B. | Terminals |
| C. | Printers |
| D. | All of the mentioned |
| Answer» E. | |