Practice Quiz in Digital and Data Communication Networks Part 29

This is the Online Practice Quiz in Digital and Data Communication Networks Part 29 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 XXIX of the Online Practice Quiz

Quiz in Digital and Data Communication Networks Question 281. It is an empirical record of a system’s actual bit error performance. A. probability of error B. error detection C. error control D. bit error rate Question 282. For an 8-PSK system, operating with an information bit rate of 24 kbps, determine the bandwidth efficiency A. 8 bits/cycle B. 2 bits/cycle C. 3 bits/cycle D. 4 bits/cycle Question 283. The event which marked the start of the modern computer age was A. design of the ENIAC computer B. development of Hollerith code C. development of the transistor D. development of disk drives for data storage Question 284. An FDM hierarchy which is formed by frequency – division multiplexing five groups containing 12 channels each for a combined bandwidth of 240 kHz. A. Supergroup B. Group C. Mastergroup D. Jumbogroup Question 285. A theory that establishes the minimum sampling rate that can be used for a given PCM systems A. Nyquist sampling theorem B. Nyquist minimum bandwidth C. Nyquist minimum bandwidth D. Any of these Question 286. The result whenever the sampling rate is less than twice the highest audio frequency A. peak limiting B. overload distortion C. alias D. quantizing noise Question 287. The characters making up the message in a synchronous transmission are collectively referred to as the data A. set B. sequence C. block D. collection Question 288. A form of switching which is hold and forward A. Packet switching B. Message switching C. Circuit switching D. Digital switching Question 289. Which of the following is not a common LAN medium? A. twin lead B. twisted pair C. fiber-optic cable D. coax Question 290. A form of switching which is stored and forward A. Packet switching B. Message switching C. Circuit switching D. Digital switching

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