MCQOPTIONS
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MCQOPTIONS
This section includes 59 Mcqs, each offering curated multiple-choice questions to sharpen your Telecom knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
What is the main function of NSS? |
| A. | Establishing communication between mobile and landline numbers. |
| B. | Providing eligible services to the subscriber |
| C. | Providing parameters for Authentication and Encryption |
| D. | All |
| Answer» E. | |
| 2. |
What are the functions of a BSC? |
| A. | Handovers, exchange functions |
| B. | Frequency hopping |
| C. | Control of radio frequency power level of BTS |
| D. | All |
| Answer» E. | |
| 3. |
What is the maximum number of Transceivers a BTS can handle is ? |
| A. | 8 |
| B. | 12 |
| C. | 16 |
| D. | 22 |
| Answer» D. 22 | |
| 4. |
The only element that personalises a Mobile Station is _______? |
| A. | Back cover |
| B. | SIM |
| C. | Screen guard |
| D. | None |
| Answer» C. Screen guard | |
| 5. |
What is PUK code of a SIM? |
| A. | PIN Unlock Key |
| B. | 4 digit code |
| C. | It is like a password to enter after inserting SIM in a mobile for the first time. It prevents misuse. |
| D. | All |
| Answer» E. | |
| 6. |
How many digits of PIN (Personal Identification Number) is allowed to protect a SIM card? |
| A. | 4 |
| B. | 8 |
| C. | 10 |
| D. | None |
| Answer» B. 8 | |
| 7. |
What controller a group of BTS or Cell Towers? |
| A. | BSC |
| B. | MSC |
| C. | HLR |
| D. | VLR |
| Answer» B. MSC | |
| 8. |
IMSI number of a SIM is also called? |
| A. | MSISDN |
| B. | IMEI |
| C. | ICCID |
| D. | None |
| Answer» D. None | |
| 9. |
Your mobile number is actually called ______ number. |
| A. | IMSI |
| B. | SIM |
| C. | MSISDN |
| D. | None |
| Answer» D. None | |
| 10. |
IMSI stands for? |
| A. | Internal Mobile Subscriber Identity |
| B. | International Mobile Subscriber Identity |
| C. | Investigating Mobile Subscriber Identity |
| D. | None |
| Answer» C. Investigating Mobile Subscriber Identity | |
| 11. |
Each SIM is identified by a unique _____ number? |
| A. | IMSI |
| B. | IMEI |
| C. | MSDN |
| D. | None |
| Answer» B. IMEI | |
| 12. |
IMEI stands for? |
| A. | Internal Mobile Equipment Identity |
| B. | International Mobile Equipment Identity |
| C. | Intra Mobile Enable Identity |
| D. | None |
| Answer» C. Intra Mobile Enable Identity | |
| 13. |
Each Mobile Terminal is identified by a unique ______ number? |
| A. | IMEI |
| B. | SIM |
| C. | IMSI |
| D. | None |
| Answer» B. SIM | |
| 14. |
A BTS is also called _____ by general public? |
| A. | Mobile tower |
| B. | Exchange |
| C. | Charging Point |
| D. | None |
| Answer» B. Exchange | |
| 15. |
A GPRS Core network is part of System in a GSM Network Structure? |
| A. | Mobile Station |
| B. | BSS |
| C. | MSS |
| D. | NSS |
| Answer» E. | |
| 16. |
What are the main parts of an MSC (Mobile Switching Center) system in a GSM structure? |
| A. | MGW - Media Gateway |
| B. | MSC Server |
| C. | Both A and B |
| D. | None |
| Answer» D. None | |
| 17. |
What are the main parts of a NSS (Network and Switching Subsystem) of a GSM Architecture? |
| A. | MSC - Mobile Switching Center |
| B. | HLR & AuC |
| C. | VLR, EIR |
| D. | All the above |
| Answer» E. | |
| 18. |
What are the main parts of a BSS (Base Station Subsystem) in a GSM network? |
| A. | BTS - Base Transceiver Station |
| B. | BSC - Base Station Controller |
| C. | A and B |
| D. | None |
| Answer» D. None | |
| 19. |
What are the main parts of a Mobile Station in a GSM Network? |
| A. | MT - Mobile Terminal |
| B. | SIM - Subscriber Identity Module |
| C. | Both A and B |
| D. | None |
| Answer» D. None | |
| 20. |
What are the three main parts of a GSM Architecture or Structure? |
| A. | Mobile Station |
| B. | BSS - Base Station Subsystem |
| C. | NSS - Network and Switching Subsystem |
| D. | All the above |
| Answer» E. | |
| 21. |
Timing Advance (TA) deals with? |
| A. | The distance between the BTS and Mobile |
| B. | Time delay of bursts from mobile |
| C. | Time advance of bursts from mobile |
| D. | All |
| Answer» E. | |
| 22. |
Which technique of GSM Architecture tells the mobile to advance it's transmission bursts (data) so that overlap with other bursts may be avoided at channel? |
| A. | DTX |
| B. | TA - Timing Advance |
| C. | Power Control |
| D. | None |
| Answer» C. Power Control | |
| 23. |
What is DTX or Discontinuous Transmission in a GSM network? |
| A. | DTC stops transmitter when the person is not talking. So less number of voice signals reach BTS with less noise. |
| B. | With the help of VAD (Voice Activity Detection), mobile identifies conversation and noise to turn off transmission. |
| C. | On the opposite end, the receiver produces a noise called Comfort Noise. With out this, DTX makes the opposite person think that the line or call is cut. |
| D. | All |
| Answer» E. | |
| 24. |
Total area served by one network operator is called ______ ? |
| A. | PSTN |
| B. | PLMN |
| C. | LA |
| D. | CGI |
| Answer» C. LA | |
| 25. |
A single MSC or VLR can have many ______ ? |
| A. | HLR |
| B. | Location Areas (LA) |
| C. | CGI - Cell Global Index |
| D. | None |
| Answer» C. CGI - Cell Global Index | |
| 26. |
A group of cells in a GSM network has a _________ number. |
| A. | Location number |
| B. | Location Area number |
| C. | Location Area Identity number |
| D. | None |
| Answer» D. None | |
| 27. |
Each cell in a GSM network has ? |
| A. | Cell number |
| B. | Cell Global number |
| C. | Cell Global Identity number |
| D. | None |
| Answer» D. None | |
| 28. |
Mobile calls to or from Fixed Networks (Landlines) are handled by ________ ? |
| A. | MSC |
| B. | GMSC (Gateway MSC) |
| C. | HLR |
| D. | VLR |
| Answer» C. HLR | |
| 29. |
Choose a correct statement about EIR list of IMEIs. |
| A. | Whitelist - List of allowed IMEIs or Mobile Devices |
| B. | Grey List - List of IMEIs with limited allowed services |
| C. | Blacklist - List of forbidden IMEIs or mobiles |
| D. | All |
| Answer» E. | |
| 30. |
What are the types of lists maintained by EIR (Equipment Identification Register)? |
| A. | Whitelist |
| B. | Grey List |
| C. | Black List |
| D. | All |
| Answer» E. | |
| 31. |
In a GSM architecture, which system stores the IMEI numbers of all working mobile phones under the network? |
| A. | HLR |
| B. | VLR |
| C. | EIR |
| D. | AUC |
| Answer» D. AUC | |
| 32. |
In a GSM architecture, which system provides Authentication and Encryption services? |
| A. | HLR |
| B. | VLR |
| C. | EIR |
| D. | AUC |
| Answer» E. | |
| 33. |
As VLR is fast to access, VLR avoids frequent accessing of ________ ? |
| A. | EIR |
| B. | AUC |
| C. | HLR |
| D. | None |
| Answer» D. None | |
| 34. |
Usually, VLR is part of _____ ? |
| A. | HLR |
| B. | EIR |
| C. | AUC |
| D. | MSC |
| Answer» E. | |
| 35. |
Between VLR and HLR, which one is used mostly allow or bar services to the user? |
| A. | VLR |
| B. | HLR |
| C. | Both are used equally |
| D. | None |
| Answer» B. HLR | |
| 36. |
Usually, VLR contains a copy of data of ______ ? |
| A. | HLR |
| B. | EIR |
| C. | AUC |
| D. | none |
| Answer» B. EIR | |
| 37. |
Covering area of an MSC is also called ____ ? |
| A. | VLR |
| B. | HLR |
| C. | EIR |
| D. | AUC |
| Answer» C. EIR | |
| 38. |
What is the name of a database used mainly that stores information of a subscriber along with eligible services under roaming or another MSC area? |
| A. | HLR |
| B. | VLR |
| C. | EIR |
| D. | AuC |
| Answer» C. EIR | |
| 39. |
What is the name of the database that stores subscriber information under an MSC and his eligible services? |
| A. | MSC |
| B. | HLR |
| C. | EIR |
| D. | AuC |
| Answer» C. EIR | |
| 40. |
What is the transmission bitrate between BTS and BSC? |
| A. | 8kbps |
| B. | 16kbps |
| C. | 32kbps |
| D. | 64kbps |
| Answer» C. 32kbps | |
| 41. |
Transmission bitrate between BSC and MSC is ____ ? |
| A. | 8 kbps |
| B. | 16kbps |
| C. | 32kpbs |
| D. | 64kbps |
| Answer» E. | |
| 42. |
In BSS Type 3, TRAU (Transcoder Unit) or Rate Adapter Unit is present in _____. |
| A. | BSC |
| B. | BTS |
| C. | MSC |
| D. | None |
| Answer» C. MSC | |
| 43. |
In BSS Types 2, 6 and 7, Speech Transcoding unit is present ______ BSS. |
| A. | Internally |
| B. | Externally (Co-located with MSC) |
| C. | -- |
| D. | -- |
| Answer» C. -- | |
| 44. |
For BSS Types 1, 4 and 5, Speech Transcoding unit presents ______ BSC. |
| A. | Inside |
| B. | Outside |
| C. | - |
| D. | - |
| Answer» B. Outside | |
| 45. |
An Authentication Center (AUC) generates ________. |
| A. | Authentication Keys (Ki) |
| B. | Cipher Keys (Kc) for encryption and Decryption |
| C. | Security parameters |
| D. | All |
| Answer» E. | |
| 46. |
An Equipment Identity Register (EIR) contains _____ lists. |
| A. | White list or Valid list |
| B. | Grey or Monitored list |
| C. | Black or Prohibited list |
| D. | All |
| Answer» E. | |
| 47. |
A VLR Database contains _____ data. |
| A. | ISDN number and Subscriber identity |
| B. | Location information to route calls |
| C. | Part of HLR data |
| D. | All |
| Answer» E. | |
| 48. |
A HLR database contains ________ ? |
| A. | IMSI and ISDN numbers |
| B. | Location info for call routing |
| C. | Information about Bearer services and Supplementary services |
| D. | All |
| Answer» E. | |
| 49. |
The functions of an MSC are ______? |
| A. | Charging the call or billing |
| B. | Signalling with outside systems |
| C. | Logical radio link control |
| D. | All |
| Answer» E. | |
| 50. |
The functions of a MSC (Mobile Services Switching Center) are _______? |
| A. | Call handling and paging |
| B. | Inter BSS and Inter MSC handovers |
| C. | Acting as a gateway to HLR |
| D. | All |
| Answer» E. | |