

InterviewSolution
This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.
51. |
Atmospheric noise, extraterrestrial noise and man-made noise is part of internal noise in communication.(a) True(b) FalseThe question was asked in unit test.Origin of the question is Costas Loop in division Double Sideband Suppressed Carrier Modulation of Analog Communications |
Answer» Correct OPTION is (b) False |
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52. |
Thermal noise is a synonym of ________(a) Atmospheric noise(b) shot noise(c) Johnson noise(d) transit time noiseThis question was posed to me in an interview for job.This is a very interesting question from Costas Loop in portion Double Sideband Suppressed Carrier Modulation of Analog Communications |
Answer» Correct choice is (C) Johnson noise |
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53. |
In a Vidicon camera tube, both sides of the target plate have the coating of Sno2.(a) True(b) FalseI got this question in an interview for internship.Question is from Costas Loop in division Double Sideband Suppressed Carrier Modulation of Analog Communications |
Answer» Correct option is (B) False |
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54. |
Distance at which a sky wave is received back on earth ________ with an angle of incidence.(a) increases(b) decreases(c) can be increase or decrease(d) can neither be increase or decreaseI have been asked this question by my college professor while I was bunking the class.This question is from Costas Loop topic in portion Double Sideband Suppressed Carrier Modulation of Analog Communications |
Answer» The correct CHOICE is (B) decreases |
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55. |
Ground wave can be used for communication upto ________(a) 5 KHz(b) 12 KHz(c) 16 KHz(d) 25 KHzThe question was asked during an interview for a job.The origin of the question is Costas Loop in portion Double Sideband Suppressed Carrier Modulation of Analog Communications |
Answer» Correct option is (c) 16 KHz |
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56. |
A Marconi antenna has length equal to ________(a) ^ʎ⁄4(b) ^ʎ⁄2(c) 1(d) ^ʎ⁄8I had been asked this question in an online quiz.The question is from Problems of DSBSC in portion Double Sideband Suppressed Carrier Modulation of Analog Communications |
Answer» The correct option is (a) ^ʎ⁄4 |
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57. |
In a Vidicon camera tube, both sides of the target plate have the coating of antimony tri-sulphide.(a) True(b) FalseThis question was addressed to me in examination.I'm obligated to ask this question of Problems of DSBSC in chapter Double Sideband Suppressed Carrier Modulation of Analog Communications |
Answer» Right option is (b) False |
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58. |
A trigonometric function is a synonym of ________(a) triangular function(b) orthogonal function(c) singular function(d) rectangular functionI got this question in an international level competition.This intriguing question comes from Problems of DSBSC topic in section Double Sideband Suppressed Carrier Modulation of Analog Communications |
Answer» Correct choice is (a) triangular FUNCTION |
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59. |
Local programmes in a cable TV can be telecast at any frequency.(a) True(b) FalseThis question was addressed to me during an interview for a job.I want to ask this question from Problems of DSBSC topic in portion Double Sideband Suppressed Carrier Modulation of Analog Communications |
Answer» CORRECT ANSWER is (a) True The EXPLANATION is: There is not a fixed frequency range or bandwidth SET for BROADCASTING of local programs in a cable TV. It can be telecasted at any frequency, depending on the channel of bandwidth available. |
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60. |
White noise is a synonym of ________(a) partition noise(b) shot noise(c) johnson noise(d) transit time noiseI had been asked this question in an internship interview.This is a very interesting question from Problems of DSBSC topic in portion Double Sideband Suppressed Carrier Modulation of Analog Communications |
Answer» The correct choice is (c) johnson noise |
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61. |
Minimum viewing angle of resolution of human eye is ________(a) \(\frac{ʎ}{d}\)(b) \(\frac{1.22ʎ}{d}\)(c) \(\frac{3ʎ}{d}\)(d) \(\frac{2ʎ}{d}\)I have been asked this question in an internship interview.The above asked question is from Problems of DSBSC in portion Double Sideband Suppressed Carrier Modulation of Analog Communications |
Answer» The correct ANSWER is (b) \(\frac{1.22ʎ}{d}\) |
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62. |
Power density spectrum of a resistor R can be expressed as ________(a) 2 kTR(b) 1 kTR(c) 0.75 kTR(d) 3 kTRThis question was addressed to me during an online interview.Enquiry is from Problems of DSBSC in chapter Double Sideband Suppressed Carrier Modulation of Analog Communications |
Answer» The correct option is (a) 2 kTR |
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63. |
VSB is generally used in ________(a) television production(b) radio transmission(c) telephonic conversations(d) long distance conversationsI had been asked this question during an internship interview.This interesting question is from Problems of DSBSC in division Double Sideband Suppressed Carrier Modulation of Analog Communications |
Answer» Correct answer is (a) television production |
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64. |
What is the typical bandwidth of a 2-wire telephone line?(a) 20 Hz to 6 KHz(b) 300 Hz to 3.4 KHz(c) 20 Hz to 20 KHz(d) 200 Hz to 6.5 KHzI got this question in an international level competition.My question is based upon Problems of DSBSC topic in chapter Double Sideband Suppressed Carrier Modulation of Analog Communications |
Answer» The correct option is (b) 300 Hz to 3.4 KHz |
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65. |
A helical antenna is used for satellite tracking due to its __________(a) broad bandwidth(b) circular polarization(c) linear polarization(d) good front to back ratioI got this question during an online exam.My doubt is from Problems of DSBSC topic in division Double Sideband Suppressed Carrier Modulation of Analog Communications |
Answer» RIGHT answer is (d) GOOD front to back ratio To explain: Helical antenna consists conducting wire. These conducting wire is WOUND around it in the form of helix. It is mainly used for satellite TRACKING due to its good front to back ratio. |
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66. |
Television transmission is possible through ________(a) DSB-SC(b) SSB-SC(c) VSB(d) AMThe question was posed to me in final exam.My question is based upon Quadrature Carrier Multiplexing in division Double Sideband Suppressed Carrier Modulation of Analog Communications |
Answer» Right answer is (c) VSB |
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67. |
The output stage in a television transmitter is likely to be ________(a) screen modulated(b) plate modulated(c) rectangular modulated(d) grid modulatedI have been asked this question in an online quiz.My question is taken from Quadrature Carrier Multiplexing topic in section Double Sideband Suppressed Carrier Modulation of Analog Communications |
Answer» The CORRECT option is (d) grid modulated |
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68. |
The advantage of using mechanical filter in filter system of sideband suppression is good band pass.(a) True(b) FalseThis question was posed to me by my school principal while I was bunking the class.The origin of the question is Quadrature Carrier Multiplexing in division Double Sideband Suppressed Carrier Modulation of Analog Communications |
Answer» The CORRECT answer is (a) True |
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69. |
The rms value of a thermal noise voltage is proportional to (where k is Boltzmann’s constant) _______(a) √k(b) k(c) k^2(d) k^^1⁄3I have been asked this question in an online quiz.Question is taken from Quadrature Carrier Multiplexing topic in division Double Sideband Suppressed Carrier Modulation of Analog Communications |
Answer» Correct answer is (a) √k |
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70. |
For a human eye the minimum viewing angle of resolution should be ^ʎ⁄D where D is iris opening and ʎ is wavelength of light.(a) True(b) FalseThe question was asked in my homework.My question comes from Quadrature Carrier Multiplexing topic in division Double Sideband Suppressed Carrier Modulation of Analog Communications |
Answer» The CORRECT option is (B) False |
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71. |
Noises which get generated within the receiver is called ________(a) Internal noise(b) External noise(c) Man-made noise(d) Extraterrestrial noiseThe question was asked in an internship interview.My question is taken from Quadrature Carrier Multiplexing in section Double Sideband Suppressed Carrier Modulation of Analog Communications |
Answer» RIGHT CHOICE is (a) Internal noise Best EXPLANATION: Internal noise in communication is the noise that gets generated within the RECEIVER or communication SYSTEM. |
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72. |
In amplitude modulation, magnitude of side bands is ________ times the carrier amplitude.(a) ^ma⁄2(b) 4ma(c) ma(d) 2maThis question was posed to me at a job interview.My question comes from Quadrature Carrier Multiplexing in division Double Sideband Suppressed Carrier Modulation of Analog Communications |
Answer» Right answer is (b) 4ma |
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73. |
Autocorrelation function of white noise is ________(a) an impulse function(b) a step function(c) a constant(d) a variableThe question was posed to me in my homework.This question is from Quadrature Carrier Multiplexing topic in chapter Double Sideband Suppressed Carrier Modulation of Analog Communications |
Answer» The correct choice is (c) a constant |
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74. |
In a Vidicon camera tube, the side of target plate facing the light has a coating ofSno2 (tin oxide) and the side facing electron gun has a coating of antimony trisulphide.(a) True(b) FalseThe question was posed to me in semester exam.My question is based upon Quadrature Carrier Multiplexing topic in section Double Sideband Suppressed Carrier Modulation of Analog Communications |
Answer» The correct answer is (a) True |
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75. |
Marconi antenna ________(a) is a grounded antenna(b) is an ungrounded antenna(c) can either be grounded or ungrounded antenna(d) can neither be grounded nor ungrounded antennaI got this question during an interview.I need to ask this question from Quadrature Carrier Multiplexing in chapter Double Sideband Suppressed Carrier Modulation of Analog Communications |
Answer» Right answer is (a) is a grounded antenna |
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76. |
Flyback switched mode is used in television because it can supply many voltage outputs.(a) True(b) FalseI have been asked this question during an internship interview.I would like to ask this question from Carrier Acquistion Techniques in DSB-SC in chapter Double Sideband Suppressed Carrier Modulation of Analog Communications |
Answer» Correct OPTION is (B) False |
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77. |
What will be the effect on power if the modulation index of a frequency modulated signal is increased?(a) increases(b) decreases(c) remains constant(d) first increases and then decreasesThis question was posed to me during an online interview.Enquiry is from Carrier Acquistion Techniques in DSB-SC topic in division Double Sideband Suppressed Carrier Modulation of Analog Communications |
Answer» Right CHOICE is (c) remains constant |
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78. |
The equation 20sin(10^8 t + 3 sin 10^9 t) represents which modulation?(a) AM(b) DSB-SC(c) PM(d) FMI had been asked this question in class test.This interesting question is from Carrier Acquistion Techniques in DSB-SC in chapter Double Sideband Suppressed Carrier Modulation of Analog Communications |
Answer» Correct ANSWER is (d) FM |
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79. |
Monopole antenna is a type of travelling wave antenna.(a) True(b) FalseThis question was posed to me in quiz.Asked question is from Carrier Acquistion Techniques in DSB-SC in division Double Sideband Suppressed Carrier Modulation of Analog Communications |
Answer» Correct choice is (b) False |
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80. |
In which modulation, frequency of carrier signal is varied with the amplitude of modulating signal?(a) FM(b) AM(c) PM(d) VSBThe question was asked in a job interview.My doubt is from Carrier Acquistion Techniques in DSB-SC in chapter Double Sideband Suppressed Carrier Modulation of Analog Communications |
Answer» Right answer is (a) FM |
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81. |
In Phase Modulation the phase of carrier signal is varied.(a) True(b) FalseI got this question in examination.The above asked question is from Carrier Acquistion Techniques in DSB-SC topic in portion Double Sideband Suppressed Carrier Modulation of Analog Communications |
Answer» The correct option is (a) True |
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82. |
Power spectral density of thermal noise remains uniform upto frequency ___________(a) 10^15 HZ(b) 10^5 HZ(c) 10^2 HZ(d) 10^13 HZI had been asked this question in an internship interview.This key question is from Carrier Acquistion Techniques in DSB-SC topic in chapter Double Sideband Suppressed Carrier Modulation of Analog Communications |
Answer» The correct ANSWER is (d) 10^13 HZ |
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83. |
Carrier frequency remains constant in cell communication.(a) True(b) FalseI had been asked this question during an online interview.Enquiry is from Carrier Acquistion Techniques in DSB-SC in chapter Double Sideband Suppressed Carrier Modulation of Analog Communications |
Answer» The correct answer is (b) False |
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84. |
Waves of which frequency can penetrate the atmosphere?(a) higher than 10 MHz(b) higher than 20 MHz(c) higher than 30 MHz(d) higher than 100 MHzI got this question by my school principal while I was bunking the class.My question comes from Carrier Acquistion Techniques in DSB-SC topic in section Double Sideband Suppressed Carrier Modulation of Analog Communications |
Answer» The correct answer is (c) HIGHER than 30 MHz |
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85. |
Armstrong modulator can only generate FM signal.(a) True(b) FalseI had been asked this question in an international level competition.My question is based upon Carrier Acquistion Techniques in DSB-SC topic in chapter Double Sideband Suppressed Carrier Modulation of Analog Communications |
Answer» Correct option is (B) False |
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86. |
Flyback switched mode is used in television because it does not require a filter choke.(a) True(b) FalseI have been asked this question in my homework.This is a very interesting question from Demodulation of DSB-SC topic in portion Double Sideband Suppressed Carrier Modulation of Analog Communications |
Answer» The correct CHOICE is (a) True |
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87. |
Waves of frequency 60MHz can penetrate the atmosphere.(a) True(b) FalseI got this question during an online exam.The above asked question is from Demodulation of DSB-SC in section Double Sideband Suppressed Carrier Modulation of Analog Communications |
Answer» The correct CHOICE is (a) True |
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88. |
Ground wave travels along surface of ground.(a) True(b) FalseThis question was posed to me during an interview.My question is based upon Demodulation of DSB-SC topic in section Double Sideband Suppressed Carrier Modulation of Analog Communications |
Answer» The correct answer is (a) True |
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89. |
In which of the modulation, the waveform is modified resulting in a signal where each quarter cycle is transposed.(a) AM(b) FM(c) PM(d) TMI had been asked this question in a job interview.My question is from Demodulation of DSB-SC in chapter Double Sideband Suppressed Carrier Modulation of Analog Communications |
Answer» Correct answer is (d) TM |
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90. |
TM stands for _________(a) Trans positional Modulation(b) Time Multiplexing(c) Transit Modulation(d) Tuned ModulationThis question was addressed to me in class test.Enquiry is from Demodulation of DSB-SC in division Double Sideband Suppressed Carrier Modulation of Analog Communications |
Answer» Right answer is (a) Trans positional Modulation |
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91. |
Which of the following is a reflector antenna?(a) Marconi reflector antenna(b) Corner reflector antenna(c) Helical antenna(d) Bow tie antennaThis question was addressed to me in a job interview.My doubt is from Demodulation of DSB-SC in section Double Sideband Suppressed Carrier Modulation of Analog Communications |
Answer» RIGHT option is (b) CORNER reflector antenna To explain I would say: It is corner reflector antenna that comes under reflector antenna. HELICAL antenna and BOW tie antenna comes under travelling wave antenna and log antenna respectively. Marconi reflector antenna comes under grounded antenna. |
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92. |
Carbon microphone has a bidirectional feature.(a) True(b) FalseI have been asked this question in an online interview.Question is from Demodulation of DSB-SC topic in section Double Sideband Suppressed Carrier Modulation of Analog Communications |
Answer» RIGHT option is (b) False The best I can explain: CARBON microphone does not have a bidirectional feature. It is ribbon microphone that has bidirectional feature. |
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