# DSP MCQ Questions: Digital Signal Processing Q&A

DSP MCQ Questions Part 2. For Part 1 see Digital Signal Processing Part 1

## DSP MCQ Questions

FFT may be used to calculate ??

1) DFT
2) IDFT
3) Direct Z transform
4) Indirect Z transform

a. 1, 2, and 3 are correct
b. 1 and 2 are correct
c. 1 and 3 are correct
d. All the four are correct

The Cooley–Tukey algorithm of FFT is a ??

a. Divide and conquer algorithm
b. Divide and rule algorithm
c. Split and rule algorithm
d. Split and combine algorithm

Frequency selectivity characteristics of DFT refer to ??

a. Ability to resolve different frequency components from input signal
b. Ability to translate into frequency domain
c. Ability to convert into discrete signal
d. None of the above

The DFT is preferred for ??

1) Its ability to determine the frequency component of the signal
2) Removal of noise
3) Filter design
4) Quantization of signal

a. 1, 2, and 3 are correct
b. 1 and 2 are correct
c. 1 and 3 are correct
d. All the four are correct

The transforming relations performed by DTFT are ??

1) Linearity
2) Modulation
3) Shifting
4) Convolution

a. 1, 2, and 3 are correct
b. 1 and 2 are correct
c. 1 and 3 are correct
d. All the four are correct

### Electronic Engineering Questions

DTFT is the representation of ??

a. Periodic Discrete-time signals
b. Aperiodic Discrete-time signals
c. Aperiodic continuous signals
d. Periodic continuous signals

The discrete impulse function is defined by ??

a. δ(n) = 1, n ≥ 0
= 0, n ≠ 1
b. δ(n) = 1, n = 0
= 0, n ≠ 1
c. δ(n) = 1, n ≤ 0
= 0, n ≠ 1
d. δ(n) = 1, n ≤ 0
= 0, n ≥ 1

A discrete-time signal maybe ??

1) Samples of a continuous signal
2) A time series which is a domain of integers
3) Time series of sequence of quantities
4) Amplitude modulated wave

a. 1, 2, and 3 are correct
b. 1 and 2 are correct
c. 1 and 3 are correct
d. All the four are correct

The roll-off factor is ??

a. The bandwidth occupied beyond the Nyquist Bandwidth of the filter
b. The performance of the filter or device
c. Aliasing effect
d. None of the above

The Nyquist theorem for sampling ??

1) Relates the conditions in a time domain and frequency domain
2) Helps in quantization
3) Limits the bandwidth requirement
4) Gives the spectrum of the signal

a. 1, 2, and 3 are correct
b. 1 and 2 are correct
c. 1 and 3 are correct
d. All the four are correct

DSP MCQ Questions

As compared to analog systems, the digital processing of signals allow ??

1) Programmable operations
2) Flexibility in the system design
3) Cheaper systems
4) More reliability

a. 1, 2, and 3 are correct
b. 1 and 2 are correct
c. 1, 2, and 4 are correct
d. All the four are correct

Telegraph signals are examples of ??

a. Digital signals
b. Analog signals
c. Impulse signals
d. Pulse train

The speech signal is obtained after ??

a. Analog to digital conversion
b. Digital to analog conversion
c. Modulation
d. Quantization

The interface between an analog signal and a digital processor is ??

a. D/A converter
b. A/D converter
c. Modulator
d. Demodulator

In DAGs, which register/s provide/s increment or step size for index register especially during the register move ??

a. Index Register
b. Length & Base Register
c. Modify Register
d. All of the above

DSP MCQ Questions

Which address/es is/are generated by Program Sequences ??

c. Both a and b
d. None of the above

To change the sampling rate for better efficiency in two or multiple stages, The decimation and interpolation factors must be _________ unity ??

a. Less than
b. Equal to
c. Greater than
d. None of the above

In direct form realization for an interpolator, which among the following generates an intermediate signal ??

a. Upsampler
b. Downsampler
c. Anti-imaging filter
d. Anti-aliasing filter

Which is/are the correct way/s for the result quantization of an arithmetic operation ??

a. Result Truncation
b. Result Rounding
c. Both a and b
d. None of the above

Which among the following has/have a provision to support an adaptive filtering mechanism ??

a. IIR
b. FIR
c. Both a and b
d. None of the above

DSP MCQ Questions

A filter is said to be a linear phase filter if the phase delay and group delay are _______ ??

a. High
b. Moderate
c. Low
d. Constant

Basically, group delay is the delayed response of filter as a function of ________ ??

a. Phase
b. Amplitude
c. Frequency
d. All of the above

A direct partial-fraction expansion of the transfer function in Z leads to ??

a. The parallel form II structure
b. The parallel form I structure
d. None of the above

A partial-fraction expansion of the transfer function in Z-1 leads to ??

a. The parallel form II structure
b. The parallel form I structure