MCQOPTIONS
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MCQOPTIONS
This section includes 657 Mcqs, each offering curated multiple-choice questions to sharpen your Testing Subject knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Which of the following statement is correct? |
| A. | A spin stabilized satellite uses solar panels whose cells are continually oriented toward the sun |
| B. | satellite transponders use a single frequency for reception and transmission from one point on earth to another |
| C. | A spin stabilized satellite uses solar panels whose cells are continually oriented toward the sun |
| D. | A spin stabilized satellite used solar cells mounted on a cylinder body that continuously rotates so that 40 a time and it also uses gyroscopic action of a spinning satellite to maintain its orientation towards the earth and the sun |
| Answer» E. | |
| 2. |
The connector that is used for connecting cable to networking devices is called |
| A. | subscriber channel (SC) |
| B. | straight-tip (ST) |
| C. | MT-RJ |
| D. | None of them |
| Answer» C. MT-RJ | |
| 3. |
Data communications are the transfer of data through some |
| A. | transmission medium |
| B. | linear medium |
| C. | Network LAN |
| D. | Protocols |
| Answer» B. linear medium | |
| 4. |
The term that is used for physical path by which a message travels from sender to receiver is |
| A. | Jitter |
| B. | Protocol |
| C. | Transmission Medium |
| D. | Information |
| Answer» D. Information | |
| 5. |
Maximum number of characters or symbols that can be represented by Unicode |
| A. | 24 |
| B. | 26 |
| C. | 216 |
| D. | 232 |
| Answer» E. | |
| 6. |
A telephone line cannot pass frequencies below |
| A. | 800Hz |
| B. | 600HZ |
| C. | 400Hz |
| D. | 200Hz |
| Answer» E. | |
| 7. |
The existing local loops with Asymmetric Digital Subscriber Line (ADSL) can handle bandwidths up to |
| A. | 1.1 Hz |
| B. | 1.1 KHz |
| C. | 1.1 MHz |
| D. | 1.1GHz |
| Answer» D. 1.1GHz | |
| 8. |
The total bandwidth required for Amplitude Modulation (AM) is |
| A. | 2B |
| B. | 2(1 + β)B. |
| C. | 2L |
| D. | 2F |
| Answer» B. 2(1 + β)B. | |
| 9. |
Asynchronous, synchronous and isochronous are three subclasses of serial transmission to send |
| A. | parallel data |
| B. | discrete data |
| C. | Continuous data |
| D. | None |
| Answer» B. discrete data | |
| 10. |
Delivering data to the correct destination is |
| A. | Delivery |
| B. | Accuracy |
| C. | Timelessness |
| D. | Jitter |
| Answer» B. Accuracy | |
| 11. |
Protocols are, set of rules to govern |
| A. | Communication |
| B. | Standards |
| C. | Metropolitan communication |
| D. | None of Above |
| Answer» B. Standards | |
| 12. |
The Asymmetric DSL is used the line code of |
| A. | DMT |
| B. | 2B1Q |
| C. | T-1line |
| D. | None of them |
| Answer» B. 2B1Q | |
| 13. |
In real life, most digital signals have bandwidth |
| A. | infinite |
| B. | Zero |
| C. | Constant |
| D. | None of the Above |
| Answer» B. Zero | |
| 14. |
The unit of the signal rate is |
| A. | Bits per second |
| B. | Baud |
| C. | micro seconds |
| D. | Hertz |
| Answer» C. micro seconds | |
| 15. |
Signal rate is also called the |
| A. | Pulse rate |
| B. | modulation rate |
| C. | baud rate. |
| D. | All of the above |
| Answer» E. | |
| 16. |
Diameter of fiber optic cable is |
| A. | 62.5 cm |
| B. | 62.5 microns |
| C. | 62.5 m |
| D. | 62.5 mm |
| Answer» C. 62.5 m | |
| 17. |
Propagation of light is |
| A. | unidirectional |
| B. | bidirectional |
| C. | multimode |
| D. | single mode |
| Answer» B. bidirectional | |
| 18. |
The twisted pair cable consists of |
| A. | none |
| B. | 1 conductor |
| C. | 2 conductors |
| D. | n conductors |
| Answer» D. n conductors | |
| 19. |
The channels can be shared in an area with many subscribers with the help of |
| A. | multi casting |
| B. | frequency sharing |
| C. | data sharing |
| D. | time sharing |
| Answer» E. | |
| 20. |
How many communication channels are needed for serial transmission? |
| A. | 1 channel |
| B. | n channels |
| C. | n+1 channels |
| D. | None of the above |
| Answer» B. n channels | |
| 21. |
The value of the error for any sample is less than |
| A. | 4Î |
| B. | 2Î |
| C. | Î |
| D. | Î/2 |
| Answer» E. | |
| 22. |
The word Tele means |
| A. | Far |
| B. | Near |
| C. | Apart |
| D. | Beside |
| Answer» B. Near | |
| 23. |
An Asymmetric Digital Subscriber Line (ADSL) is not suitable for |
| A. | games |
| B. | businesses |
| C. | residential users |
| D. | downloading |
| Answer» C. residential users | |
| 24. |
A system is using NRZ-I to transfer 10-Mbps data. What would be minimum bandwidth |
| A. | 500 kHz. |
| B. | 1000 KHz |
| C. | 2000 KHz |
| D. | 5000 KHz |
| Answer» B. 1000 KHz | |
| 25. |
In 8B6T, the minimum bandwidth is very close to |
| A. | 2BIQ |
| B. | 8B4Q. |
| C. | 6N18 |
| D. | MLT-3 |
| Answer» D. MLT-3 | |
| 26. |
The tasks of data transfer and signaling are separated in modern |
| A. | data transfer network |
| B. | signaling network |
| C. | radio networks |
| D. | telephone networks |
| Answer» E. | |
| 27. |
In data over cable system interface specification, the downstream communication has only one |
| A. | send |
| B. | receiver |
| C. | channel |
| D. | media |
| Answer» B. receiver | |
| 28. |
DSL stands for |
| A. | digital subscriber line |
| B. | digital switched line |
| C. | data subscriber line |
| D. | data switched line |
| Answer» B. digital switched line | |
| 29. |
MTP stands for |
| A. | Message transfer port |
| B. | Message telephone port |
| C. | message telephone part |
| D. | message transport part |
| Answer» E. | |
| 30. |
Multilevel Amplitude Shift Keying (MASK) is not implemented with pure Amplitude Shift Keying (ASK), it is implemented with |
| A. | QAM |
| B. | PSK |
| C. | FSK |
| D. | Binary ASK |
| Answer» B. PSK | |
| 31. |
The theoretical upstream data rate in QPSK is |
| A. | 12 Mbps |
| B. | 14 Mbps |
| C. | 18 Mbps |
| D. | 20 Mbps |
| Answer» B. 14 Mbps | |
| 32. |
The twisted pair cable in which metal casing improves the penetration of noise or crosstalk is called |
| A. | insulated twisted pair cable |
| B. | Shielded twisted pair cable |
| C. | Unshielded twisted pair cable |
| D. | Both a and b |
| Answer» C. Unshielded twisted pair cable | |
| 33. |
The idea of Return to Zero (RZ) and Non Return to Zero-Level (NRZ-L) are combined into the |
| A. | Manchester |
| B. | Differential Manchester |
| C. | Multilevel bipolar transition |
| D. | Multi transition scheme |
| Answer» B. Differential Manchester | |
| 34. |
The minimum bandwidth of the digital signal is nb times greater than the bandwidth of the |
| A. | analog signal |
| B. | digital data |
| C. | analog data |
| D. | None of the above |
| Answer» B. digital data | |
| 35. |
The radio waves, micro- waves and infrared waves are types of |
| A. | wireless transmission |
| B. | guided transmission |
| C. | both a and b |
| D. | None |
| Answer» B. guided transmission | |
| 36. |
The projection of the point on the X axis defines the peak amplitude of the |
| A. | above phase |
| B. | below phase |
| C. | in phase |
| D. | out of phase |
| Answer» D. out of phase | |
| 37. |
Data encoding is not possible if |
| A. | 2m<Ln |
| B. | 2m> Ln |
| C. | 2m=Ln |
| D. | 2m>=Ln |
| Answer» C. 2m=Ln | |
| 38. |
A no periodic signal has changed to a periodic signal with the period equal to |
| A. | 2 times the bit duration |
| B. | 4 times the bit duration |
| C. | 8 times the bit duration |
| D. | 12 times the bit duration |
| Answer» C. 8 times the bit duration | |
| 39. |
Guided media provides a conduit from one device to another, includes |
| A. | twisted pair cable |
| B. | fiber optic cable |
| C. | coaxial cable |
| D. | All of the above |
| Answer» E. | |
| 40. |
The most common unshielded twisted pair connector is |
| A. | RJ-45 |
| B. | RG-59 |
| C. | RG-58 |
| D. | RG-ll |
| Answer» B. RG-59 | |
| 41. |
The maximum data rate of 64 kbps is of |
| A. | 800 service |
| B. | 900 service |
| C. | Digital data service |
| D. | analog leased line |
| Answer» D. analog leased line | |
| 42. |
Shielded Screen Twisted pair decreases crosstalk effect and increases the data rate upto |
| A. | 100Mbps |
| B. | 125Mbps |
| C. | 200Mbps |
| D. | 600Mbps |
| Answer» E. | |
| 43. |
Infrared waves are used for |
| A. | outdoor LANs |
| B. | indoor LANs |
| C. | Wireless LANs |
| D. | satellite |
| Answer» C. Wireless LANs | |
| 44. |
If a subscriber needs to provide free connections for other subscribers, it can request the |
| A. | 800 service |
| B. | 900 service |
| C. | wide-area telephone service |
| D. | digital data service |
| Answer» B. 900 service | |
| 45. |
In line-or-sight propagation, very high-frequency signals are transmitted in straight lines directly from antenna to |
| A. | sky |
| B. | earth |
| C. | antenna |
| D. | planet |
| Answer» D. planet | |
| 46. |
The Asymmetric Digital Subscriber Line- Lite (ADSL Lite) uses carriers for |
| A. | 512 DMT |
| B. | 64 DMT |
| C. | 256 DMT |
| D. | 900 DMT |
| Answer» D. 900 DMT | |
| 47. |
The electromagnetic waves ranging in frequencies between 3 kHz and 1 GHz are called |
| A. | High frequency |
| B. | Infrared |
| C. | Microwaves |
| D. | radio waves |
| Answer» E. | |
| 48. |
The term that refers to the phase continues through the boundary of two signal elements is |
| A. | non coherent BFSK |
| B. | coherent BFSK |
| C. | Binary ASK |
| D. | Multilevel ASK |
| Answer» C. Binary ASK | |
| 49. |
The transmission media that handle the communication between offices is called |
| A. | local loops |
| B. | Trunks |
| C. | LATA |
| D. | local service exchange |
| Answer» C. LATA | |
| 50. |
The most common technique to change an analog signal to digital data is called |
| A. | Line code modulation |
| B. | Scrambling |
| C. | Block code modulation |
| D. | pulse code modulation |
| Answer» E. | |