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# CS 601 Current Midterm papers Dated 11-05-2012 to 22-05-2012

CS 601 Current Midterm papers Dated 11-05-2012 to 22-05-2012

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### Replies to This Discussion

1st:-When we transmit data from one computer to the other using a public telephone line ,then what type of data conversion take place?[2 Marks]

2nd:-What is power Bandwidth?[2 Marks]

3rd:-Why digital signals are converted into Analog signals?[3 Marks]

4th:-Explain compost signals in detail[5 Marks]

5th:-Suppose the data point of a constellation diagram have valves of (Amplitude,phase) as(4,0) and (6,0). Is the modulation ASK, PSK, or QAM? Give reason with diagram.[5 Marks]

6th:-What are the sub types of serial transmission, list down their names and mention their positive and negative points[3 Marks]

All MCQ's are from past papers.

Long Question are:
Q1: write the physical layer function.
Q2: (A) Differentiate Frequency Spectrum / Bandwidth
(B) Differentiate b/w bandwidth and throughput
Q3: Musical istruments are different sounds how a instrument works
on 15hts frequency.
Q4: how use telephony works.why its use to convert audio using
analog to digital signals?

Q5: In telephone how voice frequency works. How voice and Data travels works in
300 and 3300

These are questions i got please study mcqs from past.
__________________

Q.1 What is the Phase of signal? (2)

Q.2 which is the following is to noise and bandwidth limitation?
i) FSK
ii) PSk

Q.3 Suppose a telecom company AT&T is using MI encoding standard for its
telephone service, what is meant by Alternate marking and such type
of encoding? (3)
Q.4 What are the sub types of serial transmission, list down their names
and mention their positive and negative points? (3)
Q.5 What do you know about DC components and sycronization
problems? Explain it by keeping in view uni polar and NRZ-I
encoding schemes? (5)
Q.6 Calculate the bit rate and baud rate for an analog signal
transmitting 500 signal elements per second, where each
signal element carries 5 bits? (5)

17-05-2012, 7.30am

Q1. What is Differential Manchester? also write its funtions in detail? 5 marks.

Q2. Pulse Code Modulation (PCM) functions? 3 marks

Q3. Why digital signals are converted into analog signals? 2 marks.

Q4.What are the sub types of serial transmission, list down their names and mention their positive and negative points.3 marks.

Q5.Baud Rate is 24 baud per second, which is very low. what is its effect on transmission. 2 marks.

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