Home Topics Quiz Login

A2D & D2A Converters MCQ Questions & Answers

A2D & D2A Converters MCQs : This section focuses on the "A2D & D2A Converters". These Multiple Choice Questions (MCQs) should be practiced to improve the A2D & D2A Converters skills required for various interviews (campus interview, walk-in interview, company interview), placement, entrance exam and other competitive examinations.

Question 1

If ‘F’ is the frequency of the analog signal, then what is the minimum sampling rate required to avoid aliasing?

A. F
B. 2F
C. 3F
D. 4F

View Answer

Question 2

If the sampling rate Fs satisfies the sampling theorem, then the relation between quantization errors of analog signal(eq(t)) and discrete-time signal(eq(n)) is?

A. eq(t)=eq(n)
B. eq(t)C. eq(t)>eq(n)
D. not related

View Answer

Question 3

The difference between the unquantized x(n) and quantized xq(n) is known as ___________

A. Quantization coefficient
B. Quantization ratio
C. Quantization factor
D. Quantization error

View Answer

Question 4

The process of converting discrete-time continuous valued signal into discrete-time discrete valued (digital) signal is known as ____________

A. Sampling
B. Quantization
C. Coding
D. None of the mentioned

View Answer

Question 5

The quality of output signal from A/D converter is measured in terms of ___________

A. Quantization error
B. Quantization to signal noise ratio
C. Signal to quantization noise ratio
D. Conversion constant

View Answer

Question 6

The relation between analog frequency ‘F’ and digital frequency ‘f’ is?

A. F=f*T(where T is sampling period)
B. f=F*T
C. No relation
D. None of the mentioned

View Answer

Question 7

What is output signal when a signal x(t)=cos(2*pi*40*t) is sampled with a sampling frequency of 20Hz?

A. cos(pi*n)
B. cos(2*pi*n)
C. cos(4*pi*n)
D. cos(8*pi*n)

View Answer

Question 8

What is the discrete-time signal obtained after sampling the analog signal x(t)=cos(2000*pi*t)+sin(5000*pi*t) at a sampling rate of 5000 samples/sec?

A. cos(2.5*pi*n)+sin(pi*n)
B. cos(0.4*pi*n)+sin(pi*n)
C. cos(2000*pi*n)+sin(5000*pi*n)
D. none of the mentioned

View Answer

Question 9

What is the nyquist rate of the signal x(t)=3cos(50*pi*t)+10sin(300*pi*t)-cos(100*pi*t)?

A. 50Hz
B. 100Hz
C. 200Hz
D. 300Hz

View Answer

Question 10

Which bit coder is required to code a signal with 16 levels?

A. 8 bit
B. 4 bit
C. 2 bit
D. 1 bit

View Answer

Question 11

Which of the following is a digital-to-analog conversion process?

A. Staircase approximation
B. Linear interpolation
C. Quadratic interpolation
D. All of the mentioned

View Answer

Question 12

Which of the following should be done in order to convert a continuous-time signal to a discrete-time signal?

A. Sampling
B. Differentiating
C. Integrating
D. None of the mentioned

View Answer