# Inverse Z-transform - Electronic Engineering (MCQ) questions & answers

1)   Correlation is used for

1) Computation of average power in waveforms
2) Climatography
3) Identification of binary code word in PCM systems
4) Quantization

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

2)   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!

3)   The partial fraction of x2+1/x(x-1)2 is

a. 1/ (x-1) + 2/(x-1)2 - 1/x
b. 1/ (x-1) + 2/(x-1)2 - 3/x
c. 1/ (x-1) + 2/(x-1)2 - 3/x2
d. 1/ (x+1) + 2/(x+1)2 - 1/x
 Answer  Explanation ANSWER: 1/ (x-1) + 2/(x-1)2 - 1/x Explanation: No explanation is available for this question!

4)   For a partial fraction method to be followed,

1) The degree of the numerator must be more than the degree of the denominator.
2) The factors formed for partial fraction are a combination of Linear factors and Irreducible quadratic factors.
3) The degree of the numerator must be less than the degree of the denominator.
4) The factors formed for partial fraction are a combination of Linear factors and Square roots.

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

5)   The factors formed for partial fraction are a combination of

1) Linear factors
3) Square roots
4) Cube roots

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

6)   Partial fraction method involves

a. Allotting coefficients
b. Dividing the numerator by denominator to get fractions
c. Dividing single fraction into parts
d. None of the above
 Answer  Explanation ANSWER: Dividing single fraction into parts Explanation: No explanation is available for this question!

7)   The region of convergence of x/ (1+2x+x2) is

a. 0
b. 1
c. Negative
d. Positive
 Answer  Explanation ANSWER: 1 Explanation: No explanation is available for this question!

8)   For an expanded power series method, the coefficients represent

a. Inverse sequence values
b. Original sequence values
c. Negative values only
d. Positive values only
 Answer  Explanation ANSWER: Inverse sequence values Explanation: No explanation is available for this question!

9)   The anti causal sequences have ______ components in the left hand sequences.

a. Positive
b. Negative
c. Both a and b
d. None of the above
 Answer  Explanation ANSWER: Positive Explanation: No explanation is available for this question!

10)   The several ways to perform an inverse Z transform are

1) Direct computation
2) Long division
3) Partial fraction expansion with table lookup
4) Direct inversion

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