# IIR Filter Realization - Electronic Engineering (MCQ) questions & answers

1)   The error in the filter output that results from rounding or truncating calculations within the filter is called

a. Coefficient quantization error
c. Round off noise
d. Limit cycles
 Answer  Explanation ANSWER: Round off noise Explanation: No explanation is available for this question!

2)   The effects caused due to finite word lengths are

1) Coefficient quantization error
3) Round off noise
4) Limit cycles

a. 1, 2 and 3 are correct
b. 1 and 3 are correct
c. 1 and 4 are correct
d. All the four are correct
 Answer  Explanation ANSWER: All the four are correct 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
d. None of the above
 Answer  Explanation ANSWER: The parallel form II structure Explanation: No explanation is available for this question!

4)   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
d. None of the above
 Answer  Explanation ANSWER: The parallel form I structure Explanation: No explanation is available for this question!

5)   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!

6)   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!

1) It has same number of poles and zeros as that of individual components
2) The number of poles is the product of poles of individual components
3) The number of zeros is the product of poles of individual components
4) Over all transfer function may be determined

a. 1, 2 and 3 are correct
b. 1 and 3 are correct
c. 1 and 4 are correct
d. All the four are correct
 Answer  Explanation ANSWER: 1 and 4 are correct Explanation: No explanation is available for this question!

8)   The cascade realisation of IIR systems involves

1) The transfer function broken into product of transfer functions
2) The transfer function divided into addition of transfer functions
3) Factoring the numerator and denominator polynomials
4) Derivatives of the transfer functions

a. 1, 2 and 3 are correct
b. 1 and 3 are correct
c. 3 and 4 are correct
d. All the four are correct
 Answer  Explanation ANSWER: 1 and 3 are correct Explanation: No explanation is available for this question!

9)   The direct form II for realisation involves

1) The realisation of transfer function into two parts
2) Realisation after fraction
3) Product of two transfer functions
4) Addition of two transfer functions

a. 1, 2 and 3 are correct
b. 1 and 3 are correct
c. 3 and 4 are correct
d. All the four are correct
 Answer  Explanation ANSWER: 1 and 3 are correct Explanation: No explanation is available for this question!

10)   In direct form for realisation of IIR filters,

1) Denominator coefficients are the multipliers in the feed forward paths
2) Multipliers in the feedback paths are the positives of the denominator coefficients
3) Numerator coefficients are the multipliers in the feed forward paths
4) Multipliers in the feedback paths are the negatives of the denominator coefficients

a. 1, 2 and 3 are correct
b. 1 and 2 are correct
c. 3 and 4 are correct
d. All the four are correct
 Answer  Explanation ANSWER: 3 and 4 are correct Explanation: No explanation is available for this question!