Master of Science II (Computer Science) Examination:
Oct/Nov 2016 Semester III (New CBCS)
SLR No. Day
Date Time Subject Name Paper
No. Seat No.
SLR SC
322
Monday
21/11/2016
02:30 PM
to
05:00 PM
Mobile Computing
C
XI
Instructions: Q.No.1 and 2 are compulsory.
Answer any three questions from Q.No.3 to Q.No.7.
All questions carry equal marks.
Total Marks: 70
Q.1 Objective Questions. 10
Select correct alternatives:
DSSS meaning
Direct sequence spread spectrum
Direct sequence space spectrum
Direct sequence space signals
Direct sources space spectrum
Meaning of FHSS is
Frequency hot spread spectrum
Frequency hopping spread spectrum
Frequency hopping space spectrum
Fast hopping spread spectrum
A dynamic channel allocation scheme has been implemented in
DSSS FSSS
DECT None of these
Difference between android API and google API?
The google API includes Google Maps and other Google-specific
libraries. The android one only includes core android libraries.
The google API one only includes core android libraries. The android
includes Google maps and other Google-specific libraries.
Both and
None of these
techniques involve spreading the bandwidth needed to transmit data
which does not make sense at first sight.
Spread Spectrum Signal Propagation
Line of cipher None of these
Algorithm A3 is used for
Authentication Encryption
Generation of cipher None of these
Changing VLRs with uninterrupted availability of all services is also called

Switching Handover
Roaming GSM
Page 1 of 2
The Operation and maintenance Center moniters and controls all other
network entities via the interface.
B I
O C
10) EMS means
Electrical message service Erosion mobile service
Enhanced Message Service Enhanced Message Server
State True or false: 04
Cellular phone networks not required base stations, infrastructure networks.
Physical layer is responsible for routing packets through a network or
establishing a connection between two entities over many other intermediate
systems.
The received power Pr is proportional to 1/d2 with d being the distance
between sender and receiver is known as inverse square law.
Space Division Multiple Access is used for allocating a separated space to
users in wired networks.
Q.2 Write short notes on the following:
What is the A3 security algorithm? 04
ii) Android Layout 04

Answer the following:
Roaming 03
ii) IPv6 03
0
Q.3 Answer the following:
What is signal propagation? Explain in details multi-path propagation. 07
What is spread spectrum? Explain in details frequency hoping spread spectrum. 07
Q.4 Answer the following:
What is the handover? Explain its different scenarios. 07
Explain procedure of Mobile terminated call (MTC). 07
Q.5 Answer the following:
What is Pico-net? Explain its architecture. 07
Write a note on GSM. 07
Q.6 Answer the following
What is snooping TCP, Explain its advantages. 07
Explain in details Dynamic host configuration protocol. 07
Q.7 Answer the following:
Explain Android system architecture. 07
Explain Android activity life cycle. 07