Practice Quiz in Digital and Data Communication Networks Part 17

This is the Online Practice Quiz in Digital and Data Communication Networks Part 17 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 XVII of the Online Practice Quiz

Quiz in Digital and Data Communication Networks Question 161. What is the category of data transmission if the binary pulse is maintained for the entire bit time? A. Return to zero B. Bipolar C. Unipolar D. Non – return to zero Question 162. It is a system where the digital signals are placed directly on the coaxial cable. A. Broadband B. Baseband C. CSMA/CD D. Token ring Question 163. A scheme in which several channels are interleaved and then transmitted together is known as A. Frequency division multiplex B. Time division multiplex C. a group D. a supergroup Question 164. A signaling system in which each letter of the alphabet is represented by a different symbol is not used because A. it would be too difficult for an operator to memorize B. it is redundant C. noise would introduce too many errors D. too many pulses per letter are required Question 165. The basic modulator and demodulator circuits in PSK are A. PLLs B. Balanced modulators C. Shift registers D. Linear summers Question 166. Pulse – amplitude modulation signals are multiplexed by using A. Subcarrier B. Bandpass filters C. A/D converters D. FET switches Question 167. It is the thermal noise power normalized to 1-Hz bandwidth A. power density ratio B. thermal noise C. noise power density D. ambient temperature noise Question 168. The slope of the analog signal is greater than the delta modulator can maintain A. overload distortion B. granular noise C. slope overload D. peak limiting Question 169. It is the transmittal of digitally modulated analog signals (carrier) between two or more points in a communications system. A. Digital modulation B. Digital transmission C. Data communications D. Pulse modulation Question 170. A pulse modulation technique as the width of a constant amplitude pulse is varied proportional to the amplitude of the analog signal at the time the signal is sampled. A. Pulse Width Modulation B. Pulse Length Modulation C. Pulse Duration Modulation D. All of these

List of Practice Quizzes

---