Electronic Engineering MCQ Question Papers: ENTC, IT Interview Placement

Subject: Digital Signal Processing 4

**Part 4: List for questions and answers of Digital Signal Processing**

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**Q1. Time shifting of discrete time signal means**

**a) y[n] = x[n-k]**

**b) y[n] = x[-n-k]**

**c) y[n] = -x[n-k]**

**d) y[n] = x[n+k]**

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**Q2. A signal x[n] is anti symmetric or odd when**

**a) x[-n] = x[n] • x[n]**

**b) x[n] = -x[n]**

**c) x[n] = [x[n]]^2**

**d) x[-n] = -x[n]**

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**Q3. The principle of Gram-Schmidt Orthogonalization (GSO) states that, any set of M energy ****signals can be expressed as**

**a) Summation of N ortho normal basis functions, where N = M**

**b) Linear combinations of N ortho normal basis functions, where N = M**

**c) Product of logarithmic combinations of N ortho normal basis functions, where N = M**

**d) Product of inverse squares of N ortho normal basis functions, where N = M**

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**Q4. The norm or length of a signal is given by**

**a) The square of the energy of the signal**

**b) The square root of the energy of the signal**

**c) The inverse of the energy of the signal**

**d) The cube root of the energy of the signal**

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**Q5. The cost of the digital processors is cheaper because**

**a) Processor allows time sharing among a number of signals**

**b) The hardware is cheaper**

**c) Require less maintenance**

**d) Less power consumption**

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**Q6. In DSP processors, which among the following maintains the track of addresses of input ****data as well as the coefficients stored in data and program memories?**

**a) Data Address Generators (DAGs)**

**b) Program sequences**

**c) Barrel Shifter**

**d) MAC **

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**Q7. Which units are generally involved in Multiply and Accumulate (MAC)?**

**a) Adder**

**b) Multiplier**

**c) Accumulator**

**d) All of the above**

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**Q8. Anti-imaging filter with cut-off frequency ω_{c} = π/ I is specifically used _______ **

**upsampling process for the removal of unwanted images**

**a) Before**

**b) At the time of**

**c) After**

**d) All of the above**

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**Q9. Decimation is a process in which the sampling rate is __________**

**a) enhanced**

**b) stable**

**c) reduced**

**d) None of these**

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**Q10. How is the sensitivity of filter coefficient quantization for FIR filters?**

**a) Low**

**b) Moderate**

**c) High**

**d) Unpredictable**

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**Q11. In tapped delay line filter, the tapped line is also known as ________**

**a) Pick-on node**

**b) Pick-off node**

**c) Pick-up node**

**d) Pick-down node**

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**Q12. Which among the following represent/s the characteristic/s of an ideal filter?**

**a) Constant gain in passband**

**b) Zero gain in stop band**

**c) Linear Phase Response**

**d) All of the above **

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**Q13. The region of convergence of x/ (1+2x+x2) is**

**a) 0**

**b) 1**

**c) Negative**

**d) Positive**

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**Q14. 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**

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**Q15. 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**

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**Q16. For a system function H(s) to be stable**

**a) The zeros lie in left half of the s plane**

**b) The zeros lie in right half of the s plane**

**c) The poles lie in left half of the s plane**

**d) The poles lie in right half of the s plane**

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**Q17. The IIR filter designing involves**

**a) Designing of analog filter in analog domain and transforming into digital domain**

**b) Designing of digital filter in analog domain and transforming into digital domain**

**c) Designing of analog filter in digital domain and transforming into analog domain**

**d) Designing of digital filter in digital domain and transforming into analog domain**

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**Q18. The ROC of a system is the**

**a) range of z for which the z transform converges**

**b) range of frequency for which the z transform exists**

**c) range of frequency for which the signal gets transmitted**

**d) range in which the signal is free of noise**

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**Q19. The similarity between the Fourier transform and the z transform is that**

**a) Both convert frequency spectrum domain to discrete time domain**

**b) Both convert discrete time domain to frequency spectrum domain**

**c) Both convert analog signal to digital signal**

**d) Both convert digital signal to analog signal **

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**Q20. The s plane and z plane are related as**

**a) z = esT**

**b) z = e2sT**

**c) z = 2esT**

**d) z = esT/2 **

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**Part 4: List for questions and answers of Digital Signal Processing**

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**Q1. Answer: d**

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**Q2. Answer: b**

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**Q3. Answer: b**

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**Q4. Answer: b**

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**Q5. Answer: a**

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**Q6. Answer: a**

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**Q7. Answer: d**

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**Q8. Answer: c**

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**Q9. Answer:**

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**Q10. Answer: a**

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**Q11. Answer: b**

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**Q12. Answer: d**

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**Q13. Answer: b**

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**Q14. Answer: a**

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**Q15. Answer: a**

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**Q16. Answer: c**

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**Q17. Answer: b**

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**Q18. Answer: a**

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**Q19. Answer: b**

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**Q20. Answer: a**