a107320201-digital signal processing

8/3/2019 a107320201-Digital Signal Processing

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Code No: A107320201 Set No. 1

JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABADIII B.Tech. II Sem., I Mid-Term Examinations, February 2011

DIGITAL SIGNAL PROCESSINGObjective Exam

Name: ______________________________ Hall Ticket No.

Answer All Questions. All Questions Carry Equal Marks.Time: 20 Min. Marks: 20.

I Choose the correct alternative:

1. The process of down sampling is same as [ ]

A. Time shifting B. Time scaling C. Folding D. Amplifying

2. The necessary and sufficient condition for BIBO stability is [ ]

A. B. C. D.

3. The reflection of the signal is given by [ ]

A. Shifting B. Amplifying C. Folding D. Time scaling

4. In linear time invariant system, the |H(w)| and


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Code No: A107320201 :2: Set No.1

II Fill in the blanks:

11. The impulse response of the system can also be obtained by computing the ________of the stepresponse of the system

12. Number of complex multiplications in direct DFT are ___________

13. In linear system response to the sum of the weighted inputs is ___________ the sum of weighted

responses

14. An N-point sequence is called ________ if it is symmetric about point zero on the circle

15. Appending zeros to a sequence in order to increase its length is called ____________

16. The twiddle factor of an inverse DFT using an FFT algorithm is ____________

17. The poles of a stable system lies in _________ of s-plane

18. In overlap save method the overlapped samples in one of the output sequences are

______________

19. In an N-point DFT of a finite duration sequence x(n) of length L, the value of N should be such

that ____________

20. The ___________ of a signal can be obtained by sampling one period of Fourier transform of thesignal

-oOo-

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Code No: A107320201 Set No. 2JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD

III B.Tech. II Sem., I Mid-Term Examinations, February 2011DIGITAL SIGNAL PROCESSING

Objective ExamName: ______________________________ Hall Ticket No.





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Code No: A107320201 :2: Set No.2II Fill in the blanks:





15. In overlap save method the overlapped samples in one of the output sequences are______________

16. In an N-point DFT of a finite duration sequence x(n) of length L, the value of N should be suchthat ____________

17. The ___________ of a signal can be obtained by sampling one period of Fourier transform of the

signal

18. The impulse response of the system can also be obtained by computing the ________of the step

response of the system


20. In linear system response to the sum of the weighted inputs is ___________ the sum of weightedresponses

-oOo-

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1. The order of input and output sequence in computing IDFT using FFT is [ ]

A. Both are in normal order B. Both are in bit reversed order

C. Normal order and bit reversed order respectively D. Bit reversed order and normal order

2. A FFT algorithm for the DFT can be developed by [ ]

A. Adopting a subtract and divide approach B. A even number of samples of the given sequence

C. Adopting a divide and conquer approach D. Adding all samples

3. The DFT of the sequence x(n) = {1,0,-1,0} is [ ]A. {0,0,-2,2} B. {0,0,2,2} C. {2,2,0,0} D. {-2,2,0,0}

4. The order of input and output sequence in computing DFT using DIT-FFT is [ ]

A. Both are in normal order B. Both are in bit reversed orderC. Normal order and bit reversed order respectively D. Bit reversed order and normal order

5. In order to implement the specified difference equation of the system, the required basic operations

are [ ]A. Addition, delay and multiplication B. Shifters and delay elements

C. Multiplexers, dividers and shifters D. Multiplexers and counters




A. B. C. D.

8. The reflection of the signal is given by [ ]A. Shifting B. Amplifying C. Folding D. Time scaling



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Code No: A107320201 :2: Set No.3

II Fill in the blanks:



13. In overlap save method the overlapped samples in one of the output sequences are______________

14. In an N-point DFT of a finite duration sequence x(n) of length L, the value of N should be suchthat ____________


signal

16. The impulse response of the system can also be obtained by computing the ________of the stepresponse of the system


18. In linear system response to the sum of the weighted inputs is ___________ the sum of weighted

responses



-oOo-

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1. The DFT of the sequence x(n) = {1,0,-1,0} is [ ]

A. {0,0,-2,2} B. {0,0,2,2} C. {2,2,0,0} D. {-2,2,0,0}

2. The order of input and output sequence in computing DFT using DIT-FFT is [ ]

A. Both are in normal order B. Both are in bit reversed order

C. Normal order and bit reversed order respectively D. Bit reversed order and normal order

3. In order to implement the specified difference equation of the system, the required basic operations

are [ ]A. Addition, delay and multiplication B. Shifters and delay elementsC. Multiplexers, dividers and shifters D. Multiplexers and counters




A. B. C. D.

6. The reflection of the signal is given by [ ]

A. Shifting B. Amplifying C. Folding D. Time scaling



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Code No: A107320201 :2: Set No.4II Fill in the blanks:

11. In overlap save method the overlapped samples in one of the output sequences are

______________

12. In an N-point DFT of a finite duration sequence x(n) of length L, the value of N should be such

that ____________


signal

14. The impulse response of the system can also be obtained by computing the ________of the step

response of the system


16. In linear system response to the sum of the weighted inputs is ___________ the sum of weightedresponses





-oOo-

w.jntuworld.com

a107320201-digital signal processing

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