DSP exam solved question paper

Will you please provide me the Digital Signal Processing DSP exam solved question paper????????

[Kiran Chandar]

Here is the Digital Signal Processing DSP exam solved question paper:

1. 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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2. 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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3. 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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4. 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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5. 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



6. 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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________________________________________
7. 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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8. 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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9. 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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10. The resolution of a 6-bit DAC is ________.
A.
63% B.
64%
C.
15.9% D.
1.59%

11. 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
_______________________________________
12. 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

______________________________________
13. In troubleshooting a DAC, we check its performance characteristics, such as ________.
A.
nonmonotonicity
B.
differential nonlinearity
C.
low and high gain
D.
all of the above
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14. In a digital reproduction of an analog curve, accuracy can be increased by ________.
A.
sampling the curve more often
B.
sampling the curve less often
C.
decreasing the number of bits used to represent each sampled value
D.
all of the above
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15. In a 4-bit R/2R ladder digital-to-analog converter, because of negative feedback, the operational amplifier keeps the inverting (minus) input near ________.
A.
5 volts
B.
zero volts
C.
a voltage determined by the binary weighted input
D.
none of the above

16. What is the result of taking more samples during the quantization process?
A.
More errors in the analog-to-digital conversion
B.
More bit requirements
C.
More accurate signal representation
D.
More bit requirements and more accurate signal representation

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17. Which A/D conversion method has a fixed conversion time?
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
_______________________________________
18. Which is a typical application of digital signal processing?
A.
Noise elimination
B.
Music signal processing
C.
Image processing
D.
All of the above
_______________________________________
19. If a DAC has a full-scale, or maximum, output of 12 V and accuracy of 0.1%, then the maximum error for any output voltage is ________.
A.
12 V
B.
120 mV
C.
12 mV
D.
0 V
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20. What do we call the manipulation of an analog signal in a digital domain?
A.
Analog-to-digital conversion
B.
Digital-to-analog conversion
C.
Digital signal processing
D.
Signal filtering

21. How are unwanted frequencies removed prior to digital conversion?
A.
Pre-filters
B.
Digital signal processing
C.
Sample-and-hold circuits
D.
All of the above
________________________________________
22. Which type of programming is typically used for digital signal processors?
A.
Assembly language
B.
Machine language
C.
C
D.
None of the above
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23. Which of the following best defines Nyquist frequency?
A.
The frequency of resonance for the filtering circuit
B.
The second harmonic
C.
The lower frequency limit of sampling
D.
The highest frequency component of a given analog signal


24. Which is not an A/D conversion error?
A.
Differential nonlinearity
B.
Missing code
C.
Incorrect code
D.
Offset

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25. Settling time is normally defined as the time it takes a DAC to settle within ________.
A.
1/8 LSB of its final value when a change occurs in the input code

B.
1/4 LSB of its final value when a change occurs in the input code

C.
1/2 LSB of its final value when a change occurs in the input code

D.
1 LSB of its final value when a change occurs in the input code