Practice Quiz in Digital and Data Communication Networks Part 21

This is the Online Practice Quiz in Digital and Data Communication Networks Part 21 as one of the Communications Engineering topic. In Preparation for the ECE Board Exam make sure to expose yourself and familiarize in each and every questions compiled here taken from various sources including but not limited to past Board Examination Questions in Electronic System and Technologies, Communications Books, Journals and other Communications References.

Continue Part XXI of the Online Practice Quiz

Quiz in Digital and Data Communication Networks Question 201. The most widely used data communications code is A. Morse code B. ASCII C. Baudot D. EBCDIC Question 202. A special device that upgrades signals from one level to a higher level of the hierarchy in multiplexing A. Muldem B. Vocoder C. Modem D. Codec Question 203. It is the measure of how much information can be propagated through a communication system and is a function of a bandwidth of the transmission line A. information theory B. information capacity C. information technology D. digital communications Question 204. Indicate which of the following pulse modulation systems is analog A. PCM B. PWM C. Differential PCM D. Delta Question 205. The technique of using modulation and FDM to transmit multiple data channels of a common medium is known as A. baseband B. broadband C. ring D. bus Question 206. The ASCII code has A. 4 bits B. 5 bits C. 7 bits D. 8 bits Question 207. The carrier used with a BPSK demodulator is A. Generated by an oscillator B. The BPSK signal itself C. Twice the frequency of the transmitted carrier D. Recovered from the BPSK signal Question 208. Function of data link control that specifies the means of detecting and correcting transmission errors A. Error control B. Selection C. Protocol D. Synchronization Question 209. Which of the following words has the correct parity bit? Assume odd parity. The last bit is the parity bit. A. 1111111 1 B. 1100110 1 C. 0011010 1 D. 0000000 0 Question 210. Indicate the false statement. In order to combat noise, A. the channel bandwidth may be increased B. redundancy may be used C. the transmitted power may be increased D. the signaling rate may be reduced

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