M.Sc. (Computer Science) (Semester III)
(CBCS) Examination, 2017
MOBILE COMPUTING
WateriI
Day Date: Saturday, 22-04-2017 Max. Marks: 70
Time: 02.30 PM to 05.00 PM
N.B. Questions NO.1 and 2 are Compulsory.
Attempt any three questions from Q.NO.3 to Q.NO.7
Figures to the right indicate full marks.
Q.1 Choose the correct alternative given in the bracket. 10
CSMA system, all stations wishing to transmit access
the medium at the same time, as soon as it becomes idle,
c P-persistent On-persistent
I-persistent CA-persistent
2 DAMA is an reservation scheme.
Implicit Explicitly
Transmission All of these
3 HDLC means
High-Level Data Link control
High Data link control
High Data Layer Control
High Data load Control
4 The A interface is typically based on circuit-switched
system.
PCM-40 PCM-20 PCM-30 PCM-25
5 The main task of layer comprise channel coding
and error detection/correction.
Data link Network
Physical Transport.
6 Algorithm A3 is used for
Authentication Encryption
Generation of cipher None of these
7 A distribution system connects several BSSs via the AP to
form a single network and thereby extends the wireless
coverage area. This network is now called an
Extended Service Set Extra Service Sell
WLAN GSm
Page 2 of 3
8c) A is a collection of Bluetooth devices which are
synchronized to the hopping sequence.
Piconet Master Slave wlan
9 forming groups of piconets
scatternet Bluetooth WIFI Infra read
1 What is the use of content provider in android?
To send the data from an application to another application
To store data in a database
To share the data between application
None of the above.
State True/False: 04
In frequency hopping spread spectrum, the total available
bandwidth is split into many channels of smaller bandwidth
plus guard spaces between the channels.
This RTS is not heard by C. but triggers an acknowledgement
from B is called clear to send (CTS).
Group special mobile was founded in 1945.
Cellular phone network not required base stations,
infrastructure networks.
Q.2 Write a short note on following: 4+4
What is security algorithm in GSM?
Types of android application.
Answer the following: 3+3
Roaming
Mobile Tele service
Q3 Answer the following: 7+7
What is Multiplexing? Explain in details Code division multiplexing
What is Modulation? Explain in details advanced frequency and
phase shift keying.
Q4 Answer the following:
What is the cell? Explain cellular system in details. 7+7
Explain procedure of Localization and calling in details .
Q.5 Answer the following:
Explain format of IEEE 802.11 frame using DSS.
Write a note on Entities and terminology in mobile IP.
Q.6 Answer the following: 7+7
What is snooping TCP, Explain it's advantages.
Explain in details android application life cycle.
Page 3 of 3
Q.7 Answer the following: 7+7
Explain Android GUI architecture.
Explain android application priority and process states.