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Mobile Computing Question Paper

Mobile Computing

Course:Computer Science

Institution: Kenya Methodist University question papers

Exam Year:2011

NSTRUCTIONS Answer Question ONE and any Other TWO Questions

Question 1

a) What is mobile computing? (1mark)

b) How does mobile computing differ from Wireless LAN? (4 marks)

c) Mention four major application areas of mobile computing in our society today (4 marks)

d) i) Describe the frequency reuse concept of cellular network. (2 marks)

ii) Consider frequency reuse factor of 4 and 7.Provide the comparison in the aspect iii) of channel utilization and coping with co-channel interferences? (3 marks)

e) Highlight any three ways of coping with increasing capacity of cellular network. (3 marks)

f) Compare and contrast WIFI and Bluetooth technologies. (6 marks)

g) What is mobile IP? (1 mark)

h) Mention any three advantages of using Mobile ip ver 6 over ip ver 4. (3 marks)

i) i) What does acronym J2ME stand for? (1 mark)

ii) Distinguish between J2ME configurations and Profiles. (2 marks)

Question 2

a) Distinguish among FDMA, TDMA and CDMA channel allocation techniques. (9 marks)

b) What benefit do GPRS provide over GSM? (3 marks)

c) Describe the three features of wireless markup language (WML). (3 marks)

Question 3

a) By use of an illustration, describe how a mobile device is able to access a website from www servers. (8 marks)

b) Compare and contrast J2ME MIDlets and J2SE Applet. (4 marks)

c) Describe the three runtime states of MIDlets. (3 marks)

Question 4

a) What are Value added services(VAS)?Describe features of value added service(VAS). (3 marks)

b) Explain four roles of wireless middleware. (8 marks)

c) State four Limitations of mobile environment for data services. (4 marks)

Question 5

a) Mobile IP, the standard proposed by IETF (Internet Engineering Task Force), is designed to solve the problem mobility IP addressing by allowing each mobile node to have two IP addresses that is permanent home address and care of address. Explain the two. (4 marks)

b) Describe the following capabilities of mobile ip (6 marks)

i) Discovery

ii) Registration

iii) Tunneling

c) Create a simple java program to display “Hallo world’ on a mobile phone device screen ,alternatively provide steps for creating such program showing various java class that are required. (5 marks)

Mobile Computing Question Paper

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