UPSC Senior Scientific Assistant Electronics Model Paper
If You are appearing in UPSC exam for Senior Scientific Assistant (Electronics) post in Directorate General of Aeronautical Quality Assurance (DGAQA), Department of Defence, Ministry of Defence which will be conducting on 29th Jan 2022 at various exam centers and searching the UPSC Senior Scientific Assistant (Electronics) Previous year papers. Then you are at right place. Here we are providing the UPsC Senior Scientific Assistant (Electronics) Model paper on Analog And Digital Communication Systems
Solapur University M.Sc Electronic Science Sem I Paper March 2019
Solapur University M.Sc Electronic Science Previous Year Question Paper 2019 (March-April) on Communication Systems
| M.Sc (Semester -1)(CBCS) Examination March/ April -2019
Electronic Science COMMUNICATION SYSTEMS |
|
| 1 | The idea of RZ and the idea of NRZ-L are combined into ____scheme.
a) Manchester b) differential Manchester c) both (a) and (b) d) neither (a) nor (b) |
| 2 | The Nyquist theorem specifies the minimum sampling rate to be _____.
a) equal to the lowest frequency of a signal b) equal to the highest frequency of a signal c) twice the bandwidth of a signal d) twice the highest frequency of a signal |
| 3 | PCM is an example of _____ conversation.
a) analog- to – analog b) analog – to digital c) digital –to – digital d) digital – to- analog |
| 4 | In _______ encodingwer use three levels: positive,zeroand negative.
a) Unipolar b) Polar c) Bipolar d) none of these |
| 5 | In ________ transmission , we send bits one after another without start or stop bits or gaps. It is the responsibility of the receiver to group the bits.
a) Synchronous b) Asynchronous c) Isochronous d) none of these |
| 6 | Which quantization level results In a more faithful reproduction of the signal?
a) 2 b) 8 c) 16 d) 32 |
| 7 | AM and FM are examples of ______ conversion.
a) analog – to – analog b) digital – to – digital c) analog – to –digital d) digital – to analog |
| 8 | In _______ , the phase of the carrier is varied to represent two or more different signal elements. Both peak amplitude and frequency remain constant.
a) PSK b) FSK c) ASK d) QAM |
| 9 | Given an AM radio signal with a bandwidth of 10 KHz and the highest frequency component at 705KHz, what is the frequency of the carrier signal?
a) 710KHz b) 705KHz c) 700KHz d) Cannot be determined from given information |
| 10 | Which of the following steps is not including in the process of reception?
a) Decoding b) Encoding c) Stroage d) Interpretation |
| 11 | Companding is used______
a) to overcome quantizing noise in PCM b) in PCM transmitter, to allow amplitude limiting in the receivers c) to protect small signals ion PCM from quantizing distortion d) in the PCM receivers to overcome impulse noise |
| 12 | The local oscillator of a broadcast receiver is turned to a frequency higher that the incoming frequency.
a) to help the image frequency rejection b) to permit easier tracking c) because otherwise an intermediate frequency could not be produced d) to allow adequate frequency coverage without switching |
| 13 | Indicate which one of the following is not an advantage of FM over AM: _____
a) Better noise immunity is provided b) Lower bandwidth is required c) The transmitted power is more useful d) Less modulating power is required |
| Data Collected By – J. Jayalakshmi | |
| Published On – 2nd Dec 2021 | |
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