Related InterviewSolutions

• Why a helical antenna is used for satellite tracking?(a) because of its circular polarization(b) because of its broad bandwidth(c) because of its low bandwidth(d) because of rectangular polarizationThis question was posed to me at a job interview.My doubt is from Noise in AM topic in section Noise of Analog Communications
• Which one of the following noise becomes of great importance at high frequencies?(a) flicker noise(b) shot noise(c) impulse noise(d) transit-time noiseI got this question by my school teacher while I was bunking the class.Question is from Noise in AM topic in portion Noise of Analog Communications
• Which one of the following statement is false?(a) High Frequency mixers are generally noisier(b) Voltage of impulse noise is independent of bandwidth(c) Thermal noise is not dependent on frequency(d) Flicker noise occurs at low frequencyI have been asked this question in an interview for internship.My question is based upon Noise in AM in portion Noise of Analog Communications
• Which of broad classifications of noise are most difficult to treat?(a) noise generated in the receiver(b) noise generated in the transmitter(c) external noise(d) internal noiseThe question was posed to me in examination.Question is from Noise in AM in chapter Noise of Analog Communications
• What points must be important to remember, when we deal with random noise calculations?(a) all calculations are based on peak to peak values(b) calculations are based on quantised values(c) calculations are based on average values(d) calculations are based on RMS valuesI have been asked this question during an online interview.This question is from Noise in AM in chapter Noise of Analog Communications
• Which of the following statement is true?(a) Random noise power is inversely proportional to bandwidth(b) Flicker noise occurs at high frequency(c) Noise mixers are caused by inadequate image frequency rejection(d) A random voltage across a resistance cannot be calculatedThe question was posed to me in a job interview.I'd like to ask this question from Noise in AM in division Noise of Analog Communications
• Which of the steps is not included in the process of reception?(a) encoding(b) decoding(c) demodulating(d) filteringI got this question in class test.Origin of the question is Noise in AM topic in portion Noise of Analog Communications
• Which of the following statement is false?(a) Modulation is used to reduce the bandwidth(b) Modulation is used to separate different transmissions(c) Modulation is used to allow the use of practical antennas(d) Modulation is used to ensure that wave is transmitted over long distancesThe question was asked in my homework.My query is from Noise in AM in portion Noise of Analog Communications
• Why interlacing is used in television?(a) to reduce noise in video signals(b) to ensure that all the lines on screen are scanned(c) to reduce the disturbances(d) to avoid flickerI had been asked this question during an interview.Question is taken from Noise for DSB-SC in section Noise of Analog Communications
• The discone antenna is ________(a) useful direction-finding antenna(b) used as a radar receiving antenna(c) circularly polarized(d) useful as VHF and UHF receiving antennaI have been asked this question in class test.The doubt is from Noise for DSB-SC topic in portion Noise of Analog Communications