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# CS601 All Current Mid Term Papers Spring 2013 (25 May 2013 ~ 06 June 2013) at One Place

CS601 All Current Mid Term Papers Spring 2013 (25 May 2013 ~ 06 June 2013) at One Place

From 25 May 22, 2013 to 06 June 2013 Spring 2013

Current Mid Term Papers Spring 2013 Papers, May 2013 Mid Term Papers, Solved Mid Term Papers, Solved Papers, Solved Past Papers, Solved MCQs

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Today my paperCS 601

Q. Sketch the Manchester’s encoding for the stream “01100”.
Q. Calculate bit rate & bund rate for an analog signal transmitting 500 signals per sec, where each signal element carries 5 bit.
Q. In mobile communication which kind of Signal conversion mechanism is used and why?
Q. Why RZ requires more bandwidth than NRZ ?
etc... Just remember these questions.
Many MCQs were from OSI reference model layers mostly from layer 1 to 5 and also there were many questions from Signals and Signal Conversion methods and a few were from remaining course.

In which scheme the bandwidth seems to be higher 2 marks
a company uses NRZ scheme what problems it will face 3 marks
calculate bandwidth in KHz if signal per cycle = 6sec . 3 marks
calculate bandwidth for AM in MHz if frequency and baud rate are equal in this case what will be frequency starting from 8.. 5 marks
which system you will prefer in the polar type if there a large no. of computers in a network. 5 marks

Q no 1

What is zero frequency & hoe it effect on signal?

zero frequency means a signal has no change in one second. When a signal contains zero frequency, it cannot travel through a Tx. Medium that cannot handle it.
Q no 2

Consider a dialup modem for modulating digital data to analog signals suggest the most efficient technique used for modulation?

QAM is the most efficient of these options and is the mechanism used in all modern modems

Q no 3

Despite of having digital signals why we need to have digital to analog conversion of signal? Explain with example.

We might want to send a digital signal coming out of computer through a medium designed for analog signals
For example, To send data from one place to the other using a Telephone line. This is called “Digital-to-Analog Conversion” or “Modulating a digital Signal”
Q no 5

Consider a carrier signal whose phase & frequency remain constant varying amplitude, which kind of modulation will take place?

in AM Both frequency and phase remain constant, while the amplitude changes

Q no 6

Calculate bit rate & bund rate for an analog signal transmitting 500 signals per sec, where each signal element carries 5 bit.

–Baud Rate= Number of Signal Elements
–Baud Rate =500 bauds/second
–Bit Rate=Baud Rate * Number of bits per signal element
–Bit Rate= 500 * 5 = 2500 bps

Today was my paper, i found 12 mcqs from Moaz file, questions wording and options order were different and subject question were

1. What is zero frequency and how it affects the signal? 2 marks

2. Despite of having digital signals why we need to have digital to analog conversion of signal? Explain with example 2 marks
3. Consider a dial up modem for modulating digital data to analog signals suggest the most efficient technique used for modulation? 3 marks
4. A telecommunication company wants to convert its analog signal to digital signal, which suitable technique will you recommend? marks

5. Draw time period units frequency units table? 5 marks

Best of Luck!!!!!!!!!!

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