35 + Interview Questions in Introduction To Wireless Communication Systems in Wireless Mobile Page 1 InterviewSolution

1.	Which one is not an advantage of using frequency reuse?(a) Increased capacity(b) Limited spectrum is required(c) Same spectrum may be allocated to other network(d) Number of base stations is reducedThe question was posed to me in an interview.This key question is from Cellular Telephone Systems topic in portion Introduction to Wireless Communication Systems of Wireless/Mobile
Answer» The correct option is (d) NUMBER of base STATIONS is reduced Explanation: Frequency reuse is a technique of reusing frequencies and channels within a CELLULAR SYSTEM to IMPROVE capacity and spectral efficiency.

Discussion

2.	What is handoff?(a) Forward channel(b) Switching technique(c) Roamer(d) Guard channelI had been asked this question in an internship interview.My doubt stems from Cellular Telephone Systems topic in chapter Introduction to Wireless Communication Systems of Wireless/Mobile
Answer» Correct option is (B) SWITCHING technique Explanation: HANDOFF is a switching technique which refers to the process of TRANSFERRING an active call or DATA session from one cell in a cellular network to another.

Discussion

3.	The interference between the neighbouring base stations is avoided by ____________(a) Assigning different group of channels(b) Using transmitters with different power level(c) Using different antennas(d) Using different base stationsThis question was posed to me in exam.I'd like to ask this question from Cellular Telephone Systems topic in chapter Introduction to Wireless Communication Systems of Wireless/Mobile
Answer» The correct option is (a) Assigning different group of channels Explanation: The interference between the neighbouring BASE stations is AVOIDED by assigning different group of channels and REUSING the same channel after a certain AMOUNT of distance.

Discussion

4.	Why the size of the cell is kept small in cellular network?(a) Increase capacity(b) Decrease capacity(c) Increased size of base station electronics(d) Slow process of handoffsThe question was posed to me in unit test.I'd like to ask this question from Cellular Telephone Systems topic in portion Introduction to Wireless Communication Systems of Wireless/Mobile
Answer» Right option is (a) Increase capacity Easiest EXPLANATION: The size of the cells in cellular network is KEPT small because of the need of high capacity in areas with high USER density and reduced size and COST of base station electronics.

Discussion

5.	The process of transferring a mobile station from one base station to another is ____________(a) MSC(b) Roamer(c) Handoff(d) Forward channelThis question was addressed to me in an international level competition.I'd like to ask this question from Cellular Telephone Systems topic in division Introduction to Wireless Communication Systems of Wireless/Mobile
Answer» Right choice is (c) HANDOFF For EXPLANATION: Handoff is the process of changing the channel ASSOCIATED with current connection while a call is in progress.

Discussion

6.	What is the shape of the cell present in the cellular system?(a) Circular(b) Square(c) Hexagonal(d) TriangularI got this question by my school principal while I was bunking the class.The origin of the question is Cellular Telephone Systems topic in section Introduction to Wireless Communication Systems of Wireless/Mobile
Answer» RIGHT option is (c) HEXAGONAL For EXPLANATION: The shape of the cell present in the cellular network is hexagonal since it can cover the ENTIRE GEOGRAPHICAL area without any gap and overlapping.

Discussion

7.	Which of the following is not a standard for cordless telephony?(a) CT-2(b) DECT(c) UMTS(d) PHSI have been asked this question in quiz.This interesting question is from Cordless Telephone Systems in section Introduction to Wireless Communication Systems of Wireless/Mobile
Answer» Correct ANSWER is (c) UMTS For EXPLANATION I would say: CT-2 is a cordless telephone standard USED in Europe and Asia. DECT and PHS (Personal Handyphone System) are cordless telephone STANDARDS used in Europe and Japan respectively. UMTS is a cellular system standard.

Discussion

8.	Which two channels are responsible for initiating mobile calls?(a) FVC and FCC(b) FVC and RVC(c) FCC and RCC(d) FCC and RVCThe question was asked in unit test.The question is from Cellular Telephone Systems topic in portion Introduction to Wireless Communication Systems of Wireless/Mobile
Answer» RIGHT option is (c) FCC and RCC The BEST I can explain: FCC (Forward CONTROL CHANNEL) and RCC (Reverse Control Channel) are control channels responsible for initiating mobile calls.

Discussion

9.	Which type of transmission technique is employed by paging system?(a) Simulcasting(b) Multicasting(c) Unicasting(d) HybridThis question was addressed to me during an online interview.The query is from Paging System topic in portion Introduction to Wireless Communication Systems of Wireless/Mobile
Answer» Right CHOICE is (a) Simulcasting Best explanation: SIMULCAST is a reliable technique used by paging system by TRANSMITTING the same paging signal from multiple paging TRANSMITTERS at approximately equal times.

Discussion

10.	Which of the following is not an application of DECT?(a) Multimedia processing(b) Cordless private branch exchange(c) Wireless local loop(d) Home cordless phonesThis question was addressed to me during an online exam.Origin of the question is Cordless Telephone Systems in portion Introduction to Wireless Communication Systems of Wireless/Mobile
Answer» CORRECT answer is (a) Multimedia processing The best explanation: Users in a neighborhood served by a TELEPHONE COMPANY wired local loop can be connected by a CORDLESS phone that exchanges signals with a neighborhood antenna.

Discussion

11.	Paging system uses which mode of transmission?(a) Full duplex(b) Simplex(c) Half Duplex(d) DuplexI have been asked this question in a national level competition.I want to ask this question from Paging System topic in section Introduction to Wireless Communication Systems of Wireless/Mobile
Answer» Correct ANSWER is (b) SIMPLEX Easy explanation: Simplex systems communicate in only one way. For the paging systems, messages RECEIVED are not acknowledged and thus they use simplex mode of TRANSMISSION.

Discussion

12.	Which of the following is not a standard used for paging system?(a) POCSAG(b) ERMES(c) IS-95(d) FLEXThis question was addressed to me in an online quiz.Origin of the question is Paging System in division Introduction to Wireless Communication Systems of Wireless/Mobile
Answer» Correct answer is (c) IS-95 Easiest explanation: IS-95 is a standard used for cellular SYSTEM which is based on CODE division multiple access (CDMA). POCSAG (Post Office Code Standard Advisory Group), ERMES (European RADIO Messaging System) and FLEX are the protocols used in paging system.

Discussion

13.	What is transmitted along with the call initiation request during the origin of call by a mobile?(a) MIN(b) ESN(c) ESN and SCM(d) MIN, ESN and SCMI had been asked this question in unit test.This intriguing question originated from Cellular Telephone Systems in division Introduction to Wireless Communication Systems of Wireless/Mobile
Answer» Right answer is (d) MIN, ESN and SCM To explain I would SAY: When a mobile originates the CALL, it sends the MIN (mobile identification number), ESN (ELECTRONIC serial number) and SCM (station class mark) along with the call initiation REQUEST.

Discussion

14.	Which of the following is a fully digital cordless system?(a) CT0(b) CT1(c) CT1+(d) DECTI had been asked this question in an internship interview.This is a very interesting question from Cordless Telephone Systems in chapter Introduction to Wireless Communication Systems of Wireless/Mobile
Answer» Correct option is (d) DECT Best explanation: Digital ENHANCED cordless telecommunication (DECT) is a fully digital SYSTEM established in 1991. CT0, Ct1, Ct1+ were analog SYSTEMS established in 1980, 1984 and 1987 respectively.

Discussion

15.	Which of the following properties describes the transmitters and receivers in paging system?(a) High complexity and high power transmitter, high complexity and high power receivers(b) Low complexity and low power transmitter, low complexity and low power receivers(c) Low complexity and low power transmitter, high complexity and high power receivers(d) High complexity and high power transmitter, low complexity and low power receiversThis question was addressed to me in an online interview.Question is from Paging System in division Introduction to Wireless Communication Systems of Wireless/Mobile
Answer» Right ANSWER is (d) High complexity and high power transmitter, LOW complexity and low power receivers The explanation: High power of transmitters helps paging signal to EASILY penetrate the building and low power receivers allow long usage time and light WEIGHT batteries.

Discussion

16.	What does SCM indicates?(a) Maximum receiver power level for a particular user(b) Maximum transmitter power level for a particular user(c) Minimum receiver power level for a particular user(d) Minimum transmitter power level for a particular userThis question was addressed to me in an online interview.I need to ask this question from Cellular Telephone Systems in division Introduction to Wireless Communication Systems of Wireless/Mobile
Answer» Right choice is (B) Maximum transmitter power level for a particular user The best EXPLANATION: SCM (STATION Class Mark) indicates the maximum transmitter power level for a particular user.

Discussion

17.	What is the function of FVC (Forward Voice Channel)?(a) Voice transmission from base station to mobiles(b) Voice transmission from mobile to base station(c) Initiating mobile calls(d) Broadcast all traffic request for all mobileThis question was addressed to me in an interview.This key question is from Cellular Telephone Systems topic in chapter Introduction to Wireless Communication Systems of Wireless/Mobile
Answer» Right choice is (a) VOICE TRANSMISSION from base STATION to mobiles The explanation: FVC (FORWARD Voice CHANNEL) and RVC (Reverse Voice Channel) are responsible for voice transmission. FVC is used for voice transmission from base station to mobile and RVC is used for voice transmission from mobile to base station.

Discussion

18.	Who has the responsibility of billing and system maintenance function in cellular system?(a) Base Station(b) PSTN(c) MSC(d) Mobile systemI got this question during an online exam.This intriguing question originated from Cellular Telephone Systems in chapter Introduction to Wireless Communication Systems of Wireless/Mobile
Answer» The CORRECT answer is (c) MSC The best explanation: Mobile switching CENTER (MSC) accommodates 100,000 subscribers and 5,000 SIMULTANEOUS conversations at a time and handles all billing and system MAINTENANCE functions.

Discussion

19.	Which of the following is not a characteristic of cellular telephone system?(a) Accommodate a large number of users(b) Large geographic area(c) Limited frequency spectrum(d) Large frequency spectrumThe question was asked in final exam.I'd like to ask this question from Cellular Telephone Systems in division Introduction to Wireless Communication Systems of Wireless/Mobile
Answer» Correct option is (d) Large frequency spectrum To explain: Cellular systems accommodate a large number of users WITHIN a limited frequency spectrum over a large GEOGRAPHIC area.

Discussion

20.	What is the responsibility of MSC in cellular telephone system?(a) Connection of mobile to base stations(b) Connection of mobile to PSTN(c) Connection of base station to PSTN(d) Connection of base station to MSCI had been asked this question in unit test.I'd like to ask this question from Cellular Telephone Systems in section Introduction to Wireless Communication Systems of Wireless/Mobile
Answer» The CORRECT answer is (b) Connection of MOBILE to PSTN The EXPLANATION: Mobile Switching Center (MSC) is responsible for connecting all mobiles to the PSTN (Public Switched Telephone Network) in a cellular SYSTEM.

Discussion

21.	Which of the following is the drawback for cordless telephones?(a) Wireless technology(b) Limited coverage area(c) Mobile(d) SecurityThe question was asked in final exam.The above asked question is from Cordless Telephone Systems topic in division Introduction to Wireless Communication Systems of Wireless/Mobile
Answer» The CORRECT choice is (b) Limited coverage AREA Explanation: CORDLESS telephone systems are wireless, but they have a disadvantage of limited coverage area with cell size of approx. 300 m. Being digital, they have very LESS CHANCE of eaves dropping.

Discussion

22.	In which frequency range do the cordless phones mostly work?(a) 43-50 MHz(b) 88-108 MHz(c) 540-1600 KHz(d) 200-540 KHzI have been asked this question during a job interview.Question is taken from Cordless Telephone Systems topic in chapter Introduction to Wireless Communication Systems of Wireless/Mobile
Answer» Correct ANSWER is (a) 43-50 MHz To explain I would say: Cordless PHONES MOSTLY operate in the FREQUENCY RANGE of 43-50 MHz. The frequency range of FM is 88-108 MHz and for AM is 540-1600 KHz.

Discussion

23.	Which of the following is not the property of paging system?(a) Asymmetric communication(b) Light weight(c) High cost(d) Wide area coverageI had been asked this question by my school teacher while I was bunking the class.Question is from Paging System topic in division Introduction to Wireless Communication Systems of Wireless/Mobile
Answer» RIGHT answer is (c) High cost For explanation: One of the main REASONS for the increased users of PAGING system was its less cost. But as the prices of CELLULAR system declined, the users of paging system also decreased.

Discussion

24.	Of the total channels present in the cellular system, what is the percentage of voice and control channels?(a) 95% voice channels, 5% control channels(b) 5% voice channels, 95% control channels(c) 50% voice channels, 50% control channels(d) 25% voice channels, 75% control channelsI had been asked this question in class test.The doubt is from Cellular Telephone Systems topic in section Introduction to Wireless Communication Systems of Wireless/Mobile
Answer» The correct ANSWER is (a) 95% VOICE CHANNELS, 5% control channels For explanation: In each cellular system, control channels are 5% of the total channels available and remaining 95% are dedicated to voice and data TRAFFIC.

Discussion

25.	Which type of message cannot be sent with the help of paging system?(a) Alphanumeric message(b) Video message(c) Voice message(d) Numeric messageI had been asked this question during a job interview.Question is from Paging System topic in chapter Introduction to Wireless Communication Systems of Wireless/Mobile
Answer» Correct CHOICE is (b) Video message The explanation is: The message sent by a paging system can be NUMERIC, alphanumeric or voice depending upon the TYPE of SERVICE.

Discussion

26.	What is a pager in the paging system?(a) A transmitter(b) A receiver(c) A transceiver(d) An equalizerThis question was posed to me in an international level competition.My question is from Paging System topic in portion Introduction to Wireless Communication Systems of Wireless/Mobile
Answer» Correct answer is (b) A receiver The explanation is: A pager is a WIRELESS device which receives the page, i.e. numeric, alphanumeric or voice message SENT by the TRANSMITTER.

Discussion

27.	The information sent by paging system is known as a ___________(a) Note(b) Line(c) Message(d) PageI have been asked this question at a job interview.The query is from Paging System in division Introduction to Wireless Communication Systems of Wireless/Mobile
Answer» Correct answer is (d) PAGE The explanation: Page is concise information sent by a paging system to the SUBSCRIBERS of ENTIRE service area.

Discussion

28.	What is the range of cell diameter of DECT?(a) 300 m(b) 2 km(c) 10 km(d) 70 kmThis question was posed to me during a job interview.Enquiry is from Cordless Telephone Systems topic in portion Introduction to Wireless Communication Systems of Wireless/Mobile
Answer» The CORRECT ANSWER is (a) 300 m Easiest explanation: DECT has the cell diameter of 300 m from the BASE station while GSM is designed for outdoor use with a cell diameter of 70 KM.

Discussion

29.	Which of the following is a protocol used for cordless telephone system?(a) PACS(b) ERMES(c) IS-95(d) FLEXThe question was posed to me in an international level competition.The question is from Cordless Telephone Systems in division Introduction to Wireless Communication Systems of Wireless/Mobile
Answer» RIGHT CHOICE is (a) PACS Explanation: PACS (Personal Access Communication System) is a protocol used for CORDLESS telephone system. ERMES and FLEX are used by paging system. And IS-95 is used for CELLULAR system.

Discussion

30.	Cordless telephone system will not work under which of the following criteria?(a) Within a home(b) Within a building(c) Within campus(d) Within a cityI got this question in an international level competition.I'd like to ask this question from Cordless Telephone Systems topic in division Introduction to Wireless Communication Systems of Wireless/Mobile
Answer» Correct answer is (d) Within a CITY Easy EXPLANATION: CORDLESS telephones are used in homes, in offices, on campus, at trade SHOWS. But due to their limited coverage they cannot COVER a whole city.

Discussion

31.	Who introduced the paging system for the first time?(a) Al Gross(b) Teri Pall(c) Alexander Graham Bell(d) Martin CooperI have been asked this question in class test.I would like to ask this question from Paging System in portion Introduction to Wireless Communication Systems of Wireless/Mobile
Answer» The correct CHOICE is (a) AL Gross Explanation: AL Gross INTRODUCED the first paging system during WORLD war in 1949.

Discussion

32.	What is a paging access number?(a) An e mail id(b) A username(c) A toll free telephone number(d) A registration numberI have been asked this question in class test.The above asked question is from Paging System in section Introduction to Wireless Communication Systems of Wireless/Mobile
Answer» Right answer is (c) A TOLL free telephone NUMBER To explain: PAGING access number is a telephone number which is USED to send the information to the subscriber.

Discussion

33.	Which of the following standard of cordless telephone system is also approved as a 3G standard?(a) PHS(b) PACS(c) DECT(d) CT2I got this question in my homework.My enquiry is from Cordless Telephone Systems in portion Introduction to Wireless Communication Systems of Wireless/Mobile
Answer» Right choice is (C) DECT To explain: DECT fulfills the IMT 2000 requirements and is approved as a 3G standard by ITU (International Telecommunication Union).

Discussion

34.	Which of the following is an example of local wireless system?(a) GSM(b) Cordless telephone system(c) UMTS(d) EDGEI had been asked this question during an online interview.This key question is from Cordless Telephone Systems in portion Introduction to Wireless Communication Systems of Wireless/Mobile
Answer» Right choice is (B) CORDLESS telephone SYSTEM To elaborate: GSM, UMTS and EDGE covers WORLDWIDE area WHEREAS cordless system has vey less coverage area.

Discussion

35.	What is MIN?(a) Subscriber’s telephone number(b) Paging message(c) Traffic request number(d) Mobile InternetThe question was asked during an interview.I need to ask this question from Cellular Telephone Systems topic in section Introduction to Wireless Communication Systems of Wireless/Mobile
Answer» The correct answer is (a) Subscriber’s telephone number To EXPLAIN I WOULD say: MIN (MOBILE IDENTIFICATION Number) is a 10 digit unique number which represents the telephone number of subscriber.

Discussion

Explore topic-wise InterviewSolutions in .

What is handoff?(a) Forward channel(b) Switching technique(c) Roamer(d) Guard channelI had been asked this question in an internship interview.My doubt stems from Cellular Telephone Systems topic in chapter Introduction to Wireless Communication Systems of Wireless/Mobile

Which of the following is not a standard for cordless telephony?(a) CT-2(b) DECT(c) UMTS(d) PHSI have been asked this question in quiz.This interesting question is from Cordless Telephone Systems in section Introduction to Wireless Communication Systems of Wireless/Mobile

Which two channels are responsible for initiating mobile calls?(a) FVC and FCC(b) FVC and RVC(c) FCC and RCC(d) FCC and RVCThe question was asked in unit test.The question is from Cellular Telephone Systems topic in portion Introduction to Wireless Communication Systems of Wireless/Mobile

Which type of transmission technique is employed by paging system?(a) Simulcasting(b) Multicasting(c) Unicasting(d) HybridThis question was addressed to me during an online interview.The query is from Paging System topic in portion Introduction to Wireless Communication Systems of Wireless/Mobile

Paging system uses which mode of transmission?(a) Full duplex(b) Simplex(c) Half Duplex(d) DuplexI have been asked this question in a national level competition.I want to ask this question from Paging System topic in section Introduction to Wireless Communication Systems of Wireless/Mobile

Which of the following is not a standard used for paging system?(a) POCSAG(b) ERMES(c) IS-95(d) FLEXThis question was addressed to me in an online quiz.Origin of the question is Paging System in division Introduction to Wireless Communication Systems of Wireless/Mobile

Which of the following is a fully digital cordless system?(a) CT0(b) CT1(c) CT1+(d) DECTI had been asked this question in an internship interview.This is a very interesting question from Cordless Telephone Systems in chapter Introduction to Wireless Communication Systems of Wireless/Mobile

What is a pager in the paging system?(a) A transmitter(b) A receiver(c) A transceiver(d) An equalizerThis question was posed to me in an international level competition.My question is from Paging System topic in portion Introduction to Wireless Communication Systems of Wireless/Mobile

The information sent by paging system is known as a ___________(a) Note(b) Line(c) Message(d) PageI have been asked this question at a job interview.The query is from Paging System in division Introduction to Wireless Communication Systems of Wireless/Mobile

What is the range of cell diameter of DECT?(a) 300 m(b) 2 km(c) 10 km(d) 70 kmThis question was posed to me during a job interview.Enquiry is from Cordless Telephone Systems topic in portion Introduction to Wireless Communication Systems of Wireless/Mobile

Which of the following is a protocol used for cordless telephone system?(a) PACS(b) ERMES(c) IS-95(d) FLEXThe question was posed to me in an international level competition.The question is from Cordless Telephone Systems in division Introduction to Wireless Communication Systems of Wireless/Mobile

Who introduced the paging system for the first time?(a) Al Gross(b) Teri Pall(c) Alexander Graham Bell(d) Martin CooperI have been asked this question in class test.I would like to ask this question from Paging System in portion Introduction to Wireless Communication Systems of Wireless/Mobile

What is a paging access number?(a) An e mail id(b) A username(c) A toll free telephone number(d) A registration numberI have been asked this question in class test.The above asked question is from Paging System in section Introduction to Wireless Communication Systems of Wireless/Mobile

Which of the following standard of cordless telephone system is also approved as a 3G standard?(a) PHS(b) PACS(c) DECT(d) CT2I got this question in my homework.My enquiry is from Cordless Telephone Systems in portion Introduction to Wireless Communication Systems of Wireless/Mobile

What is MIN?(a) Subscriber’s telephone number(b) Paging message(c) Traffic request number(d) Mobile InternetThe question was asked during an interview.I need to ask this question from Cellular Telephone Systems topic in section Introduction to Wireless Communication Systems of Wireless/Mobile