WIRELESS AND MOBILE COMMUNICATION

1. What is the term used by ITU for a set of global standards of 3G systems?

a. EDGE

b. IMT 2000

c. GSM

d. CDMA

Correct Answer: b

2.Which of the following leads to evolution of 3G networks in CDMA systems?

a. Cdma2000

b. IS-95

c. IS-95B

d. CdmaOne

Correct Answer: a

3.What is 3GPP?

a. Project based on 2G standards

b. Project based on 2.5G standards

c. Project based on W-CDMA

d. Project based on cdma2000

Correct Answer: c

4.What does the number 2000 in IMT-2000 signifies?

a. Number of subscribers per cell

b. Number of cells

c. Area (Km)

d. Year

Correct Answer: d

5.Which of the following is not an application of third generation network?

a. Downloading rate up to 1 Gbps

b. Video conferencing

c. Global Positioning System (GPS)

d. Mobile TV

Correct Answer: a

6.UMTS use which multiple access technique?

a. CDMA

b. TDMA

c. FDMA

d. SDMA

Correct Answer: a

7.What is the chip rate of W-CDMA?

a. 3.84 Mcps

b. 1.2288 Mcps

c. 270.833 Ksps

d. 100 Mcps

Correct Answer: a

8.UMTS does not has backward compatibility with ____________

a. GPRS

b. IS-95

c. GSM

d. IS-136

Correct Answer: b

9.How much increase in spectral efficiency is provided by W-CDMA in comparison to GSM?

a. Three times

b. No increase

c. Six times

d. Two times

Correct Answer: c

10.Which of the following has no backward compatibility with 3G Cdma2000?

a. IS-95B

b. GPRS

c. IS-95

d. IS-95A

Correct Answer: b

11.Which of the following the first 3G CDMA air interface?

a. Cdma2000 1xRTT

b. IS-95

c. IS-95B

d. CdmaOne

Correct Answer: a

12.Within ITU IMT-2000 body, Cdma2000 1xRTT is also known as ____________

a. IS-95B

b. G3G-MC-CDMA-1X

c. Cdma2000 1xEV-DO

d. Cdma2000 1xEV-DV

Correct Answer: b

13.How many users are supported by Cdma2000 1X in comparison to 2G CDMA standard?

a. Half

b. Six times

c. Ten times

d. Twice

Correct Answer: d

14.Cdma2000 1xEV was developed by ________

a. AT&T Laboratories

b. NTT

c. Qualcomm

d. Motorola

Correct Answer: c

15.What are the two options provided by Cdma2000 1xEV?

a. Cdma2000 1xEV-DO, Cdma2000 1xEV-DV

b. Cdma2000 1xRTT. Cdma2000 3xRTT

c. Cdma2000 1xEV-DT, Cdma2000 1xEV-DO

d. 1.      Cdma2000 1xRTT, Cdma2000 1xEV-DV

Correct Answer: a

16.What is the full form of WLAN?

a. Wide Local Area Network

b. Wireless Land Access Network

c. Wireless Local Area Node

d. Wireless Local Area Network

Correct Answer: d

17.Which of the following is not a standard of WLAN?

a. AMPS

b. HIPER-LAN

c. HIPERLAN/2

d. IEEE 802.11b

Correct Answer: a

18.Which of the following 3G standard is used in Japan?

a. UTRA

b. Cdma2000

c. TD-SCDMA

d. UMTS

Correct Answer: d

19.How much increase in spectral efficiency is provided by W-CDMA in comparison to GSM?

a. Three times

b. No increase

c. Six times

d. Two times

Correct Answer: c

20.HSCSD supports which 2G standard?

a. PDC

b. GSM

c. IS-136

d. GSM and IS-136

Correct Answer: b

21.Which of the following is not a characteristic of 3G network?

a. Multi-megabit Internet access

b. LTE based network

c. Communication over VoIP

d. Unparalleled network capacity

Correct Answer: b

22.What is 3GPP?

a. Project based on 2G standards

b. Project based on 2.5G standards

c. Project based on W-CDMA

d. Project based on cdma2000

Correct Answer: c

23.What is the full form of UMTS?

a. Ubiquitous Mobile Telemetry System

b. Ubiquitous Mobile Telephone System

c. Universal Machine Telemedicine System

d. Universal Mobile Telephone System

Correct Answer: d

24.UMTS is also known as _____________

a. IS-95

b. GPRS

c. CdmaOne

d. W-CDMA

Correct Answer: d

25.What is the condition for handoff?

a. A mobile moves into a different cell while in conversation

b. A mobile moves to different cell when idle

c. A mobile remains in the same cell while in conversation

d. A mobile remains in the same cell and is idle

Correct Answer: a

26.Handoff does not require voice and control channel to be allocated to channels associated with the new base station.

a. TRUE

b.

c.

d. FALSE

Correct Answer: d

27.The time over which a call can be maintained within a cell without handoff is called _________

a. Dwell time

b. Run time

c. Peak time

d. Cell time

Correct Answer: a

28.Umbrella cell approach is possible by using _________

a. Antenna of different heights

b. Antenna of same heights

c. Different voice channels

d. Different control channels

Correct Answer: a

29.What was the typical handoff time in first generation analog cellular systems?

a. 10 seconds

b. 1 second

c. 10 milliseconds

d. 1 minute

Correct Answer: a

30.Cellular concept replaces many low power transmitters to a single high power transmitter.

a. TRUE

b.

c.

d. FALSE

Correct Answer: d

31.What is frequency reuse?

a. Process of selecting frequency of mobile equipment

b. Process of selection of number of cells

c. Process of selecting and allocating channels

d. Process of selection of mobile users

Correct Answer: c

32.Which of the following is a universally adopted shape of cell?

a. Triangle

b. Hexagon

c. Square

d. Square

Correct Answer: b

33.Actual radio coverage of a cell is called __________

a. Footprint

b. Fingerprint

c. Imprint

d. Matrix

Correct Answer: a

34.Why the shape of cell is not circle?

a. Omni directionality

b. Small area

c. Overlapping regions or gaps are left

d. Complex design

Correct Answer: c

35.During the period of call, other users can share the same channel in FDMA.

a. TRUE

b.

c.

d. FALSE

Correct Answer: d

36.The bandwidth of FDMA channel is ______

a. Zero

b. Narrow

c. Wide

d. Large

Correct Answer: b

37.__________ is based on FDMA/FDD.

a. AMPS

b. GSM

c. W-CDMA

d. Cordless telephone

Correct Answer: a

38.Frequency division duplexing provides ________ distinct bands of frequencies for _________ user.

a. Two, two

b. One, two

c. Two, many

d. Two, one

Correct Answer: d

39.Time division duplexing uses ________ to provide both a forward and reverse link.

a. Frequency

b. Time and frequency

c. Cell spacing

d. Time

Correct Answer: d

40.Which of the following measures spectrum efficiency of a wireless system?

a. Spectral capacity

b. Carrier capacity

c. Radio capacity

d. Channel capacity

Correct Answer: c

41.__________ allows subscribers to monitor neighbouring base stations.

a. ACA

b. MAHO

c. TDMA

d. FDMA

Correct Answer: b

42.Frequency reuse factor for CDMA system is ___________

a. Ten

b. One

c. Two

d. Zero

Correct Answer: b

43.Which type of cell provides the best level of service for average subscribers?

a. Reserved cell

b. Barred cell

c. Acceptance cell

d. Suitable cell

Correct Answer: d

44.Repeaters inside communications satellites are known as ___________

a. Transducers

b. Transceivers

c. TWT

d. Transponders

Correct Answer: d

45.Scattering occurs when medium consists of objects with dimensions _______ compared to the wavelength

a. Large

b. Very large

c. Small

d. Same

Correct Answer: c

46.Power density is basically termed as ________ power per unit area.

a. Refracted

b. Diffracted

c. Radiated

d. Reflected

Correct Answer: c

47.__________ carries digitally encoded user data.

a. Control channels

b. Signalling channels

c. Forward channels

d. Traffic channels

Correct Answer: d

48.Which of the following is not a control channel of GSM?

a. BCH

b. CCCH

c. DCCH

d. TCH

Correct Answer: d

49.Group of superframes in GSM is called multiframe

a.

b.

c.

d. FALSE

Correct Answer: d

50.US cellular standard CDPD stands for _________

a. Cellular Digital Packet Data

b. Cellular Digital Packet Data

c. Cellular Digital Pocket Data

d. Cellular Discrete Pocket Data

Correct Answer: a