D 06000CS307122101 Pages: 2

Reg No.: Name:
APJ ABDUL KALAM TECHNOLOGICAL UNIVERSITY
Fifth Semester B.Tech Degree (S,FE) Examination January 2022 (2015 Scheme)

Course Code: CS307
Course Name: DATA COMMUNICATION

Max. Marks: 100 Duration: 3 Hours
PARTA
Answer all questions, each carries 3 marks. Marks
1 List out the characteristics required for defining a periodic analog signal with (3)

definition of each term.

2 Draw the time domain and frequency domain plot for a sine wave of amplitude (3)
5 V and frequency 3 Hz.

3 Explain the principle used in optical fibre communication. List out the different (3)
types of fibres used.

4 Draw and explain the frequency spectrum required for wireless transmission. (3)

PART छ
Answer any two full questions, each carries 9 marks.
5 9) How do the communication models differ in data transmission? Explain with (6)

examples.
b) Define bandwidth in terms of bits per second and in terms of Hz. (3)
6 a) Compare analog and digital transmission? Which one is better? Justify your (6)
answer.
b) How will you determine the signal level required for achieving maximum (3)

capacity of a channel?

7 Compare the different wireless propagation methods used in unguided media. (9)
PART C
Answer all questions, each carries 3 marks.
8 What are the steps involved in digital data to digital signal encoding? Explain. (3)
9 Define sampling theorem. What is its significance? (3)
10 How do you maintain data disparity in time division multiplexing? Explain. (3)
11 What do you mean by multiple access of a channel? Name the methods used 0 (3)

solve issues related to multiple access.

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