Previous year question paper for DAC (B-TECH Computer Science Engineering 3rd)

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Digital & Analog Communication

Previous year question paper with solutions for Digital & Analog Communication from 2016 to 2018

Our website provides solved previous year question paper for Digital & Analog Communication from 2016 to 2018. Doing preparation from the previous year question paper helps you to get good marks in exams. From our DAC question paper bank, students can download solved previous year question paper. The solutions to these previous year question paper are very easy to understand.

Section A: Communication system components:

Introduction to Communication: Definition & means of communications; Digital and analog

signals: sign waves, square waves; Properties of signals: amplitude, frequency, phase;

Theoretical basis for data communication: Fourier analysis: Fourier series and Fourier

Transform (property, ESD, PSD and Raleigh) effect of limited bandwidth on digital signal.

Section B: Data Transmission System:

Physical connections: modulation, amplitude-, frequency-, phase- modulation; Data

encoding: binary encoding (NRZ), Manchester encoding, differential Manchester encoding.

Transmission Media: Twisted pair-, co-axial-, fiber optic-cables, wireless media

Transmission impairments: attenuation, limited bandwidth of the channels, delay distortion,

noise, data rate of the channels (Nyquist theorem, Shannon limit). Physical layer interfaces:

RS 232, X.21

Section C: Standards in data communications:

Communication modes: simplex, half duplex, full duplex; Transmission modes: serial-,

parallel-transmission; Synchronizations: Asynchronous-, synchronous-transmission; Type of

services: connection oriented-, connectionless-services; Flow control: unrestricted simplex

protocol, simplex stop- and -wait protocol, sliding window protocol; Switching systems:

circuit switching; picketing switching: data gram , virtual circuits, permanent virtual circuits.

Telephone Systems: PSTN, ISDN, asynchronous digital subscriber line.

Multiplexing: frequency division-, time-, wave- division multiplexing

Section D: Security in data communications:

Transmission errors: feedback-, forward-error control approaches; Error detection; Parity

check, block sum check, frame check sequences; Error correction: hamming codes, cyclic

redundancy check; Data encryption: secret key cryptography, public key cryptograph; Data

compression: run length encoding, Huffman encoding.

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Related Subjects
DS DE DST M3
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