Digital Signal Processing Test Questions - Set 4

1)   In the cascaded form of realisation, the polynomials are factored into

a. a product of 1st-order and 2nd-order polynomials
b. a product of 2nd-order and 3rd-order polynomials
c. a sum of 1st-order and 2nd-order polynomials
d. a sum of 2nd-order and 3rd-order polynomials
Answer  Explanation 

ANSWER: a product of 1st-order and 2nd-order polynomials

Explanation:
No explanation is available for this question!


2)   Parallel form of realisation is done in

a. High speed filtering applications
b. Low speed filtering applications
c. Both a and b
d. None of the above
Answer  Explanation 

ANSWER: High speed filtering applications

Explanation:
No explanation is available for this question!


3)   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
c. Cascaded structure
d. None of the above
Answer  Explanation 

ANSWER: The parallel form II structure

Explanation:
No explanation is available for this question!


4)   Basically, group delay is the delayed response of filter as a function of ________.

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

ANSWER: Frequency

Explanation:
No explanation is available for this question!


5)   A filter is said to be linear phase filter if the phase delay and group delay are _______

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

ANSWER: Constant

Explanation:
No explanation is available for this question!


6)   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
Answer  Explanation 

ANSWER: Both a and b

Explanation:
No explanation is available for this question!


7)   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
Answer  Explanation 

ANSWER: Both a and b

Explanation:
No explanation is available for this question!


8)   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
Answer  Explanation 

ANSWER: Upsampler

Explanation:
No explanation is available for this question!


9)   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
Answer  Explanation 

ANSWER: Greater than

Explanation:
No explanation is available for this question!


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

a. Data Address
b. Instruction Address
c. Both a and b
d. None of the above
Answer  Explanation 

ANSWER: Instruction Address

Explanation:
No explanation is available for this question!


11)   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
Answer  Explanation 

ANSWER: Modify Register

Explanation:
No explanation is available for this question!


12)   Two vectors a, b are orthogonal if

a. = 0
b. =
c. = 1
d. = -
Answer  Explanation 

ANSWER: = 0

Explanation:
No explanation is available for this question!


13)   One dimensional signal is a function of

a. Multiple independent variables
b. Single independent variable
c. Multiple dependent variables
d. Single dependent variable
Answer  Explanation 

ANSWER: Single independent variable

Explanation:
No explanation is available for this question!


14)   Superposition of signals in a linear system refers to the

a. Output that is product of all the signals
b. Output that is sum of all the signals
c. Output that is of highest amplitude of all the signals
d. Output that is of largest spectrum of all the signals
Answer  Explanation 

ANSWER: Output that is sum of all the signals

Explanation:
No explanation is available for this question!


15)   DFT is applied to

a. Infinite sequences
b. Finite discrete sequences
c. Continuous infinite signals
d. Continuous finite sequences
Answer  Explanation 

ANSWER: Finite discrete sequences

Explanation:
No explanation is available for this question!


16)   The filtering is performed using DFT using

1) Limited size or blocks of data
2) Small memory size
3) Large memory size
4) Large segments of data


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

ANSWER: 1 and 2 are correct

Explanation:
No explanation is available for this question!


17)   Discrete cosine transforms (DCTs) express a function or a signal in terms of

a. Sum of cosine functions oscillating at different frequencies
b. Sum of cosine functions oscillating at same frequencies
c. Sum of cosine functions at different sampling intervals
d. Sum of cosine functions oscillating at same sampling intervals
Answer  Explanation 

ANSWER: Sum of cosine functions oscillating at different frequencies

Explanation:
No explanation is available for this question!


18)   A system is said to be unstable if

a. None of the poles of its transfer function is shifted to the right half of s-plane
b. At least one zero of its transfer function is shifted to the right half of s-plane
c. At least one pole of its transfer function is shifted to the right half of s-plane
d. At least one pole of its transfer function is shifted to the left half of s-plane
Answer  Explanation 

ANSWER: At least one pole of its transfer function is shifted to the right half of s-plane

Explanation:
No explanation is available for this question!


19)   A system is said to be marginally unstable if

a. None of its zeros of its transfer function lies on the jω axis of s-plane
b. At least one zero of its transfer function lies on the jω axis of s-plane
c. None of its poles of its transfer function lies on the jω axis of s-plane
d. At least one pole of its transfer function lies on the jω axis of s-plane
Answer  Explanation 

ANSWER: At least one pole of its transfer function lies on the jω axis of s-plane

Explanation:
No explanation is available for this question!


20)   The nonlinear difference equations are solved using

a. Iterative method
b. Cobweb model
c. Phase diagram
d. Power series method
Answer  Explanation 

ANSWER: Phase diagram

Explanation:
No explanation is available for this question!