Rajasthan Technical University 2008 B.C.A Computer Application University of Rajasthan part-II (Electronic Communication and Data Communication) - Question Paper

Bachelor of computer applications (part II)

Examination, 2008

Paper 219

Electronic Communication and Data Communication

Q. one (a) What is the need of modulation in long distance communication ?
(b) What is M-array pulse modulation ? define giving suitable example.

Q. 2(a)What is do you mean by the term redundancy with respect to fault correction and
detection techniques.
(b) Using the cyclic Redundancy cheek (CRC) fault detection method, obtain the sequence of
redundant bits i.e CRC for the data 100100 when the CRC generator (divisor) used in 1101.

Q. 3(a)Explain transmission in attenuator. explain its kind .
(b) What do you mean by the term propagation modes with respect to optical fiber communication ?
explain the different propagation modes, used in optical fiber communication.

Q 4(a)What is ISDN? list different ISDN channels available for subscriber access to ISDN (list only ).
(b)What do you mean by an orbit of a satellite ? elaborate Geo-synchronous satellite ? explain different
advantage and disadvantage of using Geo-synchronous statellite.

Q5(a)What do you mean by digital-to-digital encoding?
(b) define ASK,FSK,PSK and QAM digital -to-analog encoding techniques using suitable bit sequence and diagram.

Q6 (a)Write short notes on the subsequent :
(1)Duobinary sisignaling
(2) PCM Technique (Analog-to-digital encoding)

Earning:   Approval pending.