Digital Signal Processing Mock Test 4

10%

Question 1 of 10

1. What is the sequence y(n) that results from the use of four point DFTs if the impulse response is h(n)={1,2,3} and the input sequence x(n)={1,2,2,1}?

{1,4,9,11,8,3}

{9,9,7,11}

{7,9,7,11}

{9,7,9,11}

Question 1 of 10

Question 2 of 10

2. In Overlap save method of long sequence filtering, how many zeros are appended to the impulse response of the FIR filter?

L-1

L+M

L+1

Question 2 of 10

Question 3 of 10

3. According to Goertzel Algorithm, if the computation of DFT is expressed as a linear filtering operation, then which of the following is true?

y_k(n)=\(\sum_{m=0}^N x(m)W_N^{-k(n-m)}\)

y_k(n)=\(\sum_{m=0}^{N+1} x(m)W_N^{-k(n-m)}\)

y_k(n)=\(\sum_{m=0}^{N-1} x(m)W_N^{-k(n+m)}\)

y_k(n)=\(\sum_{m=0}^{N-1} x(m)W_N^{-k(n-m)}\)

Question 3 of 10

Question 4 of 10

4. What is the range in which the quantization errors due to rounding off are uniformly distributed as random variables if Δ=2^-b?

(-Δ/2,Δ/2)

(-Δ,0)

(0,Δ)

None of the mentioned

Question 4 of 10

Question 5 of 10

5. The finite observation interval for the signal places a limit on the frequency resolution.

False

True

Question 5 of 10

Question 6 of 10

6. Which of the following is true in case of Overlap add method?

M-1 zeros are appended at last of each data block

M zeros are appended at last of each data block

M-1 zeros are appended at first of each data block

M zeros are appended at first of each data block

Question 6 of 10

Question 7 of 10

7. What is the equation to compute the values of the z-transform of x(n) at a set of points {zk}?

None of the mentioned

\(\sum_{n=0}^{N-1} x(n) z_k^{-n}\), k=0,1,2...L-1

\(\sum_{n=0}^{N-1} x(n) z_k ^n\), k=0,1,2...L-1

\(\sum_{n=0}^{N-1} x(n) z_{-k}^{-n}\), k=0,1,2...L-1

Question 7 of 10

Question 8 of 10

8. What is the model that has been adopt for characterizing round of errors in multiplication?

Additive white noise model

Subtractive white noise model

Multiplicative white noise model

None of the mentioned

Question 8 of 10

Question 9 of 10

9. The factors Computational complexity, memory requirements and finite word length effects are the ONLY factors influencing our choice of the realization of the system.

True

False

Question 9 of 10

Question 10 of 10

10. In which of the following methods, the output sequence is considered as shown in the below diagram?

None of the mentioned

Overlap add & save method

Overlap add method

Overlap save method

Question 10 of 10