# Test: Communication System- 6

## 25 Questions MCQ Test Basic Electronics Engineering for SSC JE (Technical) | Test: Communication System- 6

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Attempt Test: Communication System- 6 | 25 questions in 50 minutes | Mock test for Electrical Engineering (EE) preparation | Free important questions MCQ to study Basic Electronics Engineering for SSC JE (Technical) for Electrical Engineering (EE) Exam | Download free PDF with solutions
QUESTION: 1

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QUESTION: 2

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QUESTION: 3

### The Nyquist sampling interval, for the signal sin c(700t) + sin c(500t) is

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QUESTION: 4

The Nyquist rate for the signal x(t) = 2 cos (2000 π t) cos (5000 π t), is

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QUESTION: 5

A signal occupies a band 5 kHz to 10 kHz. For proper error free reconstruction at what rate it should be sampled

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QUESTION: 6

Which one of the following pulse communication systems is digital

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QUESTION: 7

A signal is sampled at 8 kHz and is quantized using 8-bit uniform quantizer. Assuming SNRqfor a sinusoidal signal, the correct statement for PCM signal with a bit rate of R is

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QUESTION: 8

What are the three steps in generating PCM in the correct sequence

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QUESTION: 9

In a PCM system, if the code word length is increased from 6 to 8 bits, the signal to quantization noise ratio improves by the factor

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QUESTION: 10

In a PCM system each quantization level is encoded into 8 bits. The signal to quantisation noise ratio is equal to

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QUESTION: 11

If the number of bits per sample in a PCM system is increased, the improvement in signal-to-quantization noise ratio will be

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QUESTION: 12

The main factor that determines the accuracy of a reconstructed PCM signal is the

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QUESTION: 13

The quantization noise of a PCM system depends on

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QUESTION: 14

Companding is used

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QUESTION: 15

Companding is used in PCM to

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QUESTION: 16

Which of the following pulse modulations are digital

1. PCM

2. Differential PCM

3. PWM

Select the correct answer using the codes given below:

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QUESTION: 17

"Slope overload" occurs in delta modulation when the

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QUESTION: 18

To overcome slope overload problem, which type of integrator is used in delta modulation

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QUESTION: 19

In delta modulation, the slope overload distortion can be reduced by

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QUESTION: 20

Which one of the following modulation technique is most affected by noise

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QUESTION: 21

In case of data transmission, which one of the following systems will give the maximum probability error

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QUESTION: 22

If S represents the carrier synchronization atthe receiver and r represents the bandwidth efficiency, then the correct statement for the coherent binary PSK is

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QUESTION: 23

If the probability of a message is 1/4, then the information in bits is

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QUESTION: 24

The capacity of a channel is given by the

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QUESTION: 25

At a given probability of error, binary coherent FSK is inferior to binary coherent PSK by

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