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IPU BCA Semester 6 - Mobile Computing - End Term Paper 2016



Paper Code: BCA-304

Subject: Mobile Computing

IPU BCA Semester 6 - Mobile Computing - End Term Paper 2016

Time: 3 Hours Maximum Marks: 75

Note: Attempt any five questions including Q No. 1 , which is compulsory.

Question 1: Answer the following:

(a) Explain any two types of antenna used in wireless transmission. (2)
(b) Explain the path loss of radio signals. (2)
(c) Explain how spread spectrum avoids narrow band interference. (2)
(d) Define the terms hidden terminal and exposed terminal. (2)
(e) Explain the process of inter cell handover and intra cell handover. (2)
(f) Mention the features of mobile internet. (2)
(g) Explain the features of WML cards and WML deck. (2)
(h) Mention the role of timer and book marks in WML script. (2)

Question 2:
(a) Define the terms related to signal propagation: (2)
- Transmission range,
- Detection range,
- Interference range

(b) Explain the occurrence of long term fading and short term fading in multi-path propagation  (4)
(c) Draw the waveforms of AFSK and APSK and explain them. (5)

Question 3:
(a) Compare Space Division multiplexing, Frequency Divison Multiplexing and Time Division Multiplexing. Give their respective applications.   (4+2 = 6)

(b) Explain how MACA avoids hidden terminals and exposed terminals. Give illustration for each. (4)

(c) Explain Reservation TDMA access scheme and polling TDMA access scheme. Give an example for each. (5)

Question 4:
(a) Compare the following: (6)

(b) Draw the system architecture of GSM. Explain its working. (4)

(c) Explain the process of mobile originated cell and mobile terminated call GSM. (5)

Question 5:
(a) Explain the following features in WML. (6)

(b) Mention any four types of input used in WML. (4)

(c) Give an example to illustrate table tags and image tags in WML (5)

Question 6:
(a) Explain WAP architecture. (5)

(b) Using WML illustrate loop statement and conditional statement. (5)

(c) Write WML script function to check a valid 10 digit mobile number. For a valid 10 digit number, display the message "correct number" and for invalid number, display "wrong number". (5)

Question 7:
(a) Explain WML script programs. (5)
(b) Mention any five features of WML Script standard library reference. (5)
(c) Explain the security and limitations in WAP services. (5)