GSM & CDMA Questions

Objective Type Questions

All Questions carry 1 mark

1.      _______ is an analog cellular phone system using FDMA.

a.      AMPS

b.      D-AMPS

c.       GSM

d.      None of the above

2.      ________ is a second-generation cellular phone system based on CDMA and DSSS.

a.      GSM

b.      D-AMPS

c.       IS-95

d.      WCDMA

3.      If you have 5 MHz frequency band what will be the maximum number of channels as per GSM system?

a.      25

b.      35

c.       20

d.      24

4.      Which channel is used to transmit random access signals?

a.      BCCH

b.      CCCH

c.       SDCCH

d.      TCH

5.      The Value Range of Timing Advance (TA) in GSM is?

a.      0-31

b.      0-128

c.       0-61

d.      0-63

6.      In GSM carrier separation is 200KHz whereas in CDMA it is 5MHz (True/False)

7.      When MS is in dedicated mode, the information for non urgent procedure like radio link supervision measurement, transmit power control and timing advance data, is carried on

a.      SDCCH

b.      FACCH

c.       TCH

d.      SACCH

8.      Ciphering key Kc is never transmitted over radio interface. True/ False

9.      Larger cells are more useful in

a.      Densely populated urban areas

b.      Rural areas

c.       Lightly populated urban areas

d.      Mountainous areas.

10.  In up-link direction ARFCN (Absolute Radio Frequency Carrier Number) of 100 corresponds to frequency of (where 1 = ARFCN = 124)

a.      909.8 MHz

b.      910 MHz

c.       910.2 MHz

d.      910.5 MHz

11.  Cells in one Location Area can be served by different VLR s. True/False

12.  For intra-BSC normal Hand-over (not forced Hand-over) unit responsible for taking a decision that Hand-over is required

a.    BSC

b.    MSC

c.    VLR

d.    HLR

13.  In case inter-MSC Handover, MSC to MSC communication makes use of

a.      MAP-D Interface

b.      MAP-E Interface

c.       MAP-C Interface

d.      A-bis

14.  The maximum data rate supported by GSM system is

a.      4800bps

b.      2100bps

c.       6900bps

d.      7000bps

15.  In GSM the signaling protocol supported BTS and BSC is

a.      LAPD

b.      LAPDm

c.       SS7

d.      MAP

16.  Location Area is an area covered by ______.

a.     BTS

b.    BSC

c.     MSC/VLR

d.    None of the above

17.  Which Modulation Scheme is used in GSM and GPRS

a.      PSK

b.      GMSK

c.       ASK

d.      FSK

18.  What is the output power of BTS

a.      33DBm

b.      43DBm

c.       53DBm

d.      63DBm

19.  In CDMA, the pseudo-random code must have the following property

a.      It must be deterministic

b.      It must appear random to a listener without prior knowledge of the code

c.       The code must have a long period

d.      All of the above

20.  In IS-95, two types of Maximum-Length PN Sequences or PN Codes are used: The Short PN Code and the Long PN Code. What is the maximum length of the Short PN Sequence when the PN Code is generated with a 15-stage Linear Shift Register?

a.      16,384 chips

b.      32,768 chips

c.       1,228,800 chips

d.      None of the above