Digital Communications Interview Freshers Online Exam Quiz
Digital Communications Interview Freshers GK Quiz. Question and Answers related to Digital Communications Interview Freshers. MCQ (Multiple Choice Questions with answers about Digital Communications Interview Freshers
For both PPM and PDM _______ is kept constant.
Options
A : Amplitude
B : Time period
C : Frequency
D : Number of levels
In pulse modulation, reciprocal of T(time) is
Options
A : Bandwidth
B : Symbol rate
C : Signal voltage
D : None of the mentioned
In which waveform one is represented by half bit wide pulse positioned during the first half and zero is represented by half bit wide pulse positioned in the second half?
Options
A : Bi-p-L
B : Bi-p-M
C : Bi-p-S
D : Delay modulation
Which binary waveform uses three levels?
Options
A : Bipolar RZ
B : RZ-AMI
C : Bipolar RZ & RZ-AMI
D : None of the mentioned
In M-ary PPM waveform, modulation is effected by
Options
A : Delaying
B : Advancing
C : Delaying & Advancing
D : None of the mentioned
Which waveform scheme introduces bandwidth compression?
Options
A : Duobinary
B : Manchester coding
C : Phase encoded waveform
D : Multilevel codes
Which waveform type has the feature of clocking?
Options
A : Manchester coding
B : Bbi-p-M
C : Delay modulation
D : NRZ-L
Which method should be implemented for reducing bandwidth?
Options
A : Multilevel codes
B : Multilevel signalling
C : PAM
D : PDM
Which waveform type has better noise immunity?
Options
A : NRZ
B : RZ
C : Phase encoded
D : Multilevel codes
Which waveform has the feature of error detection?
Options
A : NRZ-L
B : RZ-AMI
C : Manchester coding
D : Duobinary
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