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Digital Signal Processing MCQ Questions & Answers

Digital Signal Processing MCQs : This section focuses on the "Digital Signal Processing". These Multiple Choice Questions (MCQs) should be practiced to improve the Digital Signal Processing skills required for various interviews (campus interview, walk-in interview, company interview), placement, entrance exam and other competitive examinations.




Question 1

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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Question 2

What is the program that is used to speed the spectrum analysis process?

A. DDFT
B. FDFT
C. FGPA
D. Fast Fourier transforms

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Question 3

Why is said that branch prediction is not applicable in a digital signal processor?

A. low bandwidth
B. high bandwidth
C. low frequency
D. high frequency

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Question 4

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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Question 5

How many buses did DSP56000 possess?

A. 2
B. 3
C. 4
D. 5

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Question 6

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

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Question 7

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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Question 8

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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Question 9

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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Question 10

Which of the following is not possible when the signal is analog?

A. Phase shifting
B. Equalization
C. Modulation
D. Data compression

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Question 11

Selectivity in a DSP is better than its analog equivalent.

A. True
B. False

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Question 12

Which architecture in digital signal processor reduces the execution time?

A. Harvard
B. CISC
C. program storage
D. von Neumann

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Question 13

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

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Question 14

The resolution of a 6-bit DAC is ________.

A. 63%
B. 64%
C. 15.90%
D. 1.59%

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Question 15

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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Question 16

What is the accessibility limitation of only one data or instruction set at a time from the memory called?

A. Von Neumann limitation
B. Von Neumann limit
C. Von Neumann speed
D. Von Neumann bottleneck

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Question 17

How many registers does a DSP56000 have?

A. 4
B. 5
C. 7
D. 6

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Question 18

Any digital computer can be used for DSP.

A. True
B. False

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Question 19

What happens after the signal is passed through the analog to digital converter in a DSP?

A. Changed back to analog
B. Stored in a RAM
C. Amplified
D. Attenuated

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Question 20

Which is a typical application of digital signal processing?

A. Noise elimination
B. Music signal processing
C. Image processing
D. All of the above

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Question 21

What does AAU stand for?

A. arithmetic address unit
B. address arithmetic unit
C. address access unit
D. arithmetic access unit

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Question 22

Which of the following bits are used for sign extension in DSP56000?

A. upper 8 bits of the stack pointer
B. lower 8 bits of the stack pointer
C. lower 8 bits of the program counter
D. upper 8 bits of the program counter

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Question 23

Which architecture can one overcome the low bandwidth issue in MC6800 family?

A. RISC
B. CISC
C. von Neumann
D. program stored

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Question 24

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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Question 25

How many tables does an FIR function of a digital signal processor possess?

A. 1
B. 2
C. 3
D. 4

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Question 26

What is the process of examining the frequency content of a signal?

A. Signal decoding
B. Spectrum analysis
C. Signal analysis
D. Data analysis

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Question 27

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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Question 28

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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Question 29

How many bits does DSP56000 processor have?

A. 8
B. 16
C. 24
D. 32

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Question 30

How many address register does the AAU of a DSP56000 have?

A. 8
B. 16
C. 24
D. 32

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Question 31

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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Question 32

Who is credited with creating the stored program concept?

A. John Von Neumann
B. Larry Page
C. Alan Turing
D. Ken Thompson

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Question 33

What types of modules are used in the digital signal processor to form the loop structure?

A. modulo-timer
B. modulo-counter
C. timer
D. external timer

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Question 34

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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Question 35

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

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Question 36

Which is not an A/D conversion error?

A. Differential nonlinearity
B. Missing code
C. Incorrect code
D. Offset

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Question 37

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

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Question 38

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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Question 39

What are the factors of filters which are determined by the speed of the operation in a digital signal processor?

A. attenuation constant
B. frequency
C. bandwidth
D. phase

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Question 40

Which type of architecture uses different storage space for program code and the data?

A. Von Neumann architecture
B. Harvard architecture
C. Fragmented architecture
D. Split cell architecture

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Question 41

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

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Question 42

Reduction in the number of binary words required to represent an analog signal is called ________

A. Undersampling
B. Oversampling
C. Data compression
D. Data minimization

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Question 43

Which of the following architecture does DSP56000 possess?

A. Harvard
B. von Neumann
C. CISC
D. program-stored

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Question 44

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

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Question 45

Which of the following processors also can work as a digital signal processor?

A. 8086
B. 8088
C. 8080
D. ARM9E

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Question 46

Name a processor which is used in digital audio appliances.

A. 8086
B. Motorola DSP56000
C. 80486
D. 8087

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Question 47

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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