Electronic Engineering MCQ Question Papers: ENTC, IT Interview Placement

Subject: Digital Signal Processing 5

**Part 5: List for questions and answers of Digital Signal Processing**

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**Q1. DIT algorithm divides the sequence into**

**a) Positive and negative values**

**b) Even and odd samples**

**c) Upper higher and lower spectrum**

**d) Small and large samples**

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**Q2. The Cooley–Tukey algorithm of FFT is a**

**a) Divide and conquer algorithm**

**b) Divide and rule algorithm**

**c) Split and rule algorithm**

**d) Split and combine algorithm**

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**Q3. Frequency selectivity characteristics of DFT refers to**

**a) Ability to resolve different frequency components from input signal**

**b) Ability to translate into frequency domain**

**c) Ability to convert into discrete signal**

**d) None of the above**

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**Q4. DTFT is the representation of**

**a) Periodic Discrete time signals**

**b) Aperiodic Discrete time signals**

**c) Aperiodic continuous signals**

**d) Periodic continuous signals**

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**Q5. Roll-off factor is**

**a) The bandwidth occupied beyond the Nyquist Bandwidth of the filter**

**b) The performance of the filter or device**

**c) Aliasing effect**

**d) None of the above**

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**Q6. Telegraph signals are examples of**

**a) Digital signals**

**b) Analog signals**

**c) Impulse signals**

**d) Pulse train **

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**Q7. The speech signal is obtained after**

**a) Analog to digital conversion**

**b) Digital to analog conversion**

**c) Modulation**

**d) Quantization**

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**Q8. The interface between an analog signal and a digital processor is**

**a) D/A converter**

**b) A/D converter**

**c) Modulator**

**d) Demodulator**

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**Q9. In a flash analog-to-digital converter, the output of each comparator is connected to an ****input of a ________**

**a) decoder**

**b) priority encoder**

**c) multiplexer**

**d) demultiplexer**

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**Q10. Which term applies to the maintaining of a given signal level until the next sampling?**

**a) Holding**

**b) Aliasing**

**c) Shannon frequency sampling**

**d) Stair-stepping**

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**Q11. An op-amp has very ________**

**a) high voltage gain**

**b) high input impedance**

**c) low output impedance**

**d) all of the above**

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**Q12. For a 4-bit DAC, the least significant bit (LSB) is ________**

**a) 6.25% of full scale**

**b) 0.625% of full scale**

**c) 12% of full scale**

**d) 1.2% of full scale **

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**Q13. The dual-slope analog-to-digital converter finds extensive use in ________**

**a) digital voltmeters**

**b) function generators**

**c) frequency counters**

**d) all of the above**

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**Q14. The ADC0804 is an example of a _______**

**a) single-slope analog-to-digital converter**

**b) dual-slope analog-to-digital converter**

**c) digital-ramp analog-to-digital converter**

**d) successive-approximation analog-to-digital converter**

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**Q15. In a digital representation of voltages using an 8-bit binary code, how many values can ****be defined?**

**a) 16**

**b) 64**

**c) 128**

**d) 256**

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**Q16. A 4-bit R/2R ladder digital-to-analog converter uses ________**

**a) one resistor value**

**b) two resistor values**

**c) three resistor values**

**d) four resistor values**

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**Q17. A binary-weighted-input digital-to-analog converter has a feedback resistor, Rf, of 12 k ****. If 50 A of current is through the resistor, voltage out of the circuit is ______**

**a) 0.6 V**

**b) –0.6 V**

**c) 0.1 V**

**d) –0.1 V**

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**Q18. The resolution of a 6-bit DAC is ________**

**a) 63%**

**b) 64%**

**c) 15.9%**

**d) 1.59% **

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**Q19. Which type of ADC quantizes the analog signal into a stream of bits whose amount ****corresponds to the signal level?**

**a) Successive approximation**

**b) Sigma-delta**

**c) Dual-slope**

**d) None of the above**

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**Q20. A binary-weighted-input digital-to-analog converter has an input resistor of 100 k . If ****the resistor is connected to a 5 V source, current through the resistor is ________**

**a) 50 mA**

**b) 50 A**

**c) 5 mA**

**d) 500 A **

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**Part 5: List for questions and answers of Digital Signal Processing**

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**Q1. Answer: b**

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**Q2. Answer: a**

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**Q3. Answer: a**

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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: b**

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**Q8. Answer: b**

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**Q9. Answer: b**

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**Q10. Answer: a**

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**Q11. Answer: d**

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**Q12. Answer: a**

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**Q13. Answer: d**

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**Q14. Answer: d**

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**Q15. Answer: d**

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**Q16. Answer: b**

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**Q17. Answer: b**

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**Q18. Answer: d**

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**Q19. Answer: d**

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**Q20. Answer: d**