McqMate
These multiple-choice questions (MCQs) are designed to enhance your knowledge and understanding in the following areas: Master of Computer Applications (MCA) .
Chapters
| 1. |
Rules that govern a communication exchange are |
| A. | Media |
| B. | Criteria |
| C. | Protocol |
| D. | All of above |
| Answer» C. Protocol | |
| 2. |
Performance of data communications depend on |
| A. | No. of users |
| B. | Transmission media |
| C. | H/w and S/w |
| D. | All of above |
| Answer» D. All of above | |
| 3. |
The information to be communicated in a data communication system is |
| A. | Medium |
| B. | Protocol |
| C. | Message |
| D. | Transmission |
| Answer» C. Message | |
| 4. |
In a network with 25 computers, which topology would require most extensive calling |
| A. | Mesh |
| B. | Star |
| C. | Bus |
| D. | Ring |
| Answer» B. Star | |
| 5. |
In a network with 25 computers, which topology would require most extensive calling |
| A. | Mesh |
| B. | Star |
| C. | Bus |
| D. | Ring |
| Answer» A. Mesh | |
| 6. |
Which topology features a point to point line configuration |
| A. | Mesh |
| B. | Star |
| C. | Ring |
| D. | All of above |
| Answer» D. All of above | |
| 7. |
A cable break in which topology stops all transmission |
| A. | Mesh |
| B. | Bus |
| C. | Star |
| D. | Primary |
| Answer» B. Bus | |
| 8. |
The OSI model consist of |
| A. | 3 layers |
| B. | 5 layers |
| C. | 7 layers |
| D. | 8 layers |
| Answer» C. 7 layers | |
| 9. |
Dialog control is the function of which layer |
| A. | Transport |
| B. | Session |
| C. | Presentation |
| D. | Application |
| Answer» B. Session | |
| 10. |
Data unit is called a frame in |
| A. | Physical layer |
| B. | Network layer |
| C. | Presentation layer |
| D. | Data link layer |
| Answer» D. Data link layer | |
| 11. |
Communication between a computer and a keyboard involves ______________ transmission. |
| A. | simplex |
| B. | half-duplex |
| C. | full-duplex |
| D. | automatic |
| Answer» A. simplex | |
| 12. |
A television broadcast is an example of _______ transmission. |
| A. | simplex |
| B. | half-duplex |
| C. | full-duplex |
| D. | automatic |
| Answer» A. simplex | |
| 13. |
A _______ connection provides a dedicated link between two devices. |
| A. | point-to-point |
| B. | multipoint |
| C. | primary |
| D. | secondary |
| Answer» A. point-to-point | |
| 14. |
In a _______ connection, more than two devices can share a single link. |
| A. | point-to-point |
| B. | multipoint |
| C. | primary |
| D. | secondary |
| Answer» B. multipoint | |
| 15. |
In _______ transmission, the channel capacity is shared by both communicating devices at all times. |
| A. | simplex |
| B. | half-duplex |
| C. | full-duplex |
| D. | half-simplex |
| Answer» C. full-duplex | |
| 16. |
In the original ARPANET, _______ were directly connected together. |
| A. | IMPs |
| B. | host computers |
| C. | networks |
| D. | routers |
| Answer» A. IMPs | |
| 17. |
This was the first network. |
| A. | CSNET |
| B. | NSFNET |
| C. | ANSNET |
| D. | ARPANET |
| Answer» D. ARPANET | |
| 18. |
Which organization has authority over interstate and international commerce in the communications field? |
| A. | ITU-T |
| B. | IEEE |
| C. | FCC |
| D. | ISOC |
| Answer» C. FCC | |
| 19. |
_______ are special-interest groups that quickly test, evaluate, and standardize new technologies. |
| A. | Forums |
| B. | Regulatory agencies |
| C. | Standards organizations |
| D. | All of the above |
| Answer» A. Forums | |
| 20. |
Which agency developed standards for physical connection interfaces and electronic signaling specifications? |
| A. | EIA |
| B. | ITU-T |
| C. | ANSI |
| D. | ISO |
| Answer» A. EIA | |
| 21. |
_______ is the protocol suite for the current Internet. |
| A. | TCP/IP |
| B. | NCP |
| C. | UNIX |
| D. | ACM |
| Answer» A. TCP/IP | |
| 22. |
_______ refers to the structure or format of the data, meaning the order in which they are presented. |
| A. | Semantics |
| B. | Syntax |
| C. | Timing |
| D. | All of the above |
| Answer» B. Syntax | |
| 23. |
________ defines how a particular pattern to be interpreted, and what action is to be taken based on that interpretation. |
| A. | Semantics |
| B. | Syntax |
| C. | Timing |
| D. | None of the above |
| Answer» A. Semantics | |
| 24. |
_______ refers to two characteristics: when data should be sent and how fast it can be sent. |
| A. | Semantics |
| B. | Syntax |
| C. | Timing |
| D. | none of the above |
| Answer» C. Timing | |
| 25. |
The_________ layer is responsible for the delivery of a message from one process to another. |
| A. | physical |
| B. | transport |
| C. | network |
| D. | none of the above |
| Answer» B. transport | |
| 26. |
The Internetworking Protocol (IP) is a ________ protocol. |
| A. | reliable |
| B. | connection-oriented |
| C. | both a and b |
| D. | none of the above |
| Answer» D. none of the above | |
| 27. |
_______ is a process-to-process protocol that adds only port addresses, checksum error control, and length information to the data from the upper layer. |
| A. | TCP |
| B. | UDP |
| C. | IP |
| D. | none of the above |
| Answer» B. UDP | |
| 28. |
__________ provides full transport layer services to applications. |
| A. | TCP |
| B. | UDP |
| C. | ARP |
| D. | none of the above |
| Answer» A. TCP | |
| 29. |
The ________ address, also known as the link address, is the address of a node as defined by its LAN or WAN. |
| A. | port |
| B. | physical |
| C. | logical |
| D. | none of the above |
| Answer» B. physical | |
| 30. |
Ethernet uses a ______ physical address that is imprinted on the network interface card (NIC). |
| A. | 32-bit |
| B. | 64-bit |
| C. | 6-byte |
| D. | none of the above |
| Answer» C. 6-byte | |
| 31. |
Which layer links the network support layers and user support layers |
| A. | session layer |
| B. | data link layer |
| C. | transport layer |
| D. | network layer |
| Answer» C. transport layer | |
| 32. |
Which address is used in an internet employing the TCP/IP protocols? |
| A. | physical address and logical address |
| B. | port address |
| C. | specific address |
| D. | all of the mentioned |
| Answer» D. all of the mentioned | |
| 33. |
Which address identifies a process on a host? |
| A. | physical address |
| B. | logical address |
| C. | port address |
| D. | specific address |
| Answer» C. port address | |
| 34. |
Transmission data rate is decided by |
| A. | network layer |
| B. | physical layer |
| C. | data link layer |
| D. | transport layer |
| Answer» B. physical layer | |
| 35. |
Physical layer provides |
| A. | mechanical specifications of electrical connectors and cables |
| B. | electrical specification of transmission line signal level |
| C. | specification for IR over optical fiber |
| D. | all of the mentioned |
| Answer» D. all of the mentioned | |
| 36. |
The physical layer translates logical communication requests from the ______ into hardware specific operations. |
| A. | data link layer |
| B. | network layer |
| C. | trasnport layer |
| D. | application layer |
| Answer» A. data link layer | |
| 37. |
A single channel is shared by multiple signals by |
| A. | analog modulation |
| B. | digital modulation |
| C. | multiplexing |
| D. | none of the mentioned |
| Answer» C. multiplexing | |
| 38. |
Wireless transmission can be done via |
| A. | radio waves |
| B. | microwaves |
| C. | infrared |
| D. | all of the mentioned |
| Answer» D. all of the mentioned | |
| 39. |
In asynchronous serial communication the physical layer provides |
| A. | start and stop signaling |
| B. | flow control |
| C. | both (a) and (b) |
| D. | none of the mentioned |
| Answer» C. both (a) and (b) | |
| 40. |
The physical layer is responsible for |
| A. | line coding |
| B. | channel coding |
| C. | modulation |
| D. | all of the mentioned |
| Answer» D. all of the mentioned | |
| 41. |
Attenuation means |
| A. | loss of energy |
| B. | change in form or shape of a signal |
| C. | crosstalk |
| D. | difference in frequency |
| Answer» A. loss of energy | |
| 42. |
If r is the number of data elements carried per signal element, N is the data rate, and S is the signal rate, then |
| A. | S= N x r |
| B. | S = N/r |
| C. | N = S x r x r |
| D. | None of the above |
| Answer» B. S = N/r | |
| 43. |
NRZ L and NRZ I differ in |
| A. | synchronization |
| B. | transition |
| C. | Both a and b |
| D. | None |
| Answer» C. Both a and b | |
| 44. |
Analog to digital conversion can be done using |
| A. | PCM |
| B. | DM |
| C. | Both a and b |
| D. | Neither a nor b |
| Answer» C. Both a and b | |
| 45. |
The frequency of the modulated signal is constant for the duration of one signal element, but changes for the next signal element if the data element changes. Both peak amplitude and phase remain constant for all signal elements. This is |
| A. | PSK |
| B. | FSK |
| C. | ASK |
| D. | None of the above |
| Answer» B. FSK | |
| 46. |
QAM combines |
| A. | ASK and FSK |
| B. | FSK and PSK |
| C. | ASK and PSK |
| D. | None of the above |
| Answer» C. ASK and PSK | |
| 47. |
Differential Manchester and multi line transmission (MLT-3) schemes differ in |
| A. | Number of transition rules to encode binary data |
| B. | Self synchronization |
| C. | Both a and b |
| D. | None of the above |
| Answer» C. Both a and b | |
| 48. |
OSI model defines an open system as |
| A. | a set of protocols that allows any two different systems to communicate |
| B. | a set of rules for open access |
| C. | a standard |
| D. | None of the above |
| Answer» A. a set of protocols that allows any two different systems to communicate | |
| 49. |
1 TeraHertz = |
| A. | 1000000 Hz |
| B. | 1000000000 Hz |
| C. | 1000000000000 Hz |
| D. | None of the above |
| Answer» C. 1000000000000 Hz | |
| 50. |
Shannon capacity formula for noisy channel is |
| A. | C = B Log (SNR) |
| B. | C = B Log (1/SNR) |
| C. | C = B Log (1 + SNR) |
| D. | None of the above |
| Answer» C. C = B Log (1 + SNR) | |
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