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Digital Signal Processing Comprehensive Examination

Total questions: 132

Worksheet time: 1hrs 8mins

Name
Class
Date
1.

This is a signal that fluctuates exactly like the original signal.

a)

Analog

b)

Digital

c)

High Definition

d)

Binary

2.

This is a signal where the data is represented by binary digits.

a)

Digital

b)

Analog

c)

NTSC

d)

CRT

3.
The signal above is an example of a(n)
a)
Digital Signal
b)
Analog Signal
4.
Which is an example of an analog signal?
a)
Blu-Ray DVD
b)
VHS Tape
5.
Smooth and continuous data
a)
analog
b)
digital
c)
pulse
d)
binary
6.
This is how analog signal looks like.
a)
True
b)
False
7.

A big disadvantage of digital technology is the recording does degrade over time.

a)

True

b)

False

8.

An analog signal is sent in discrete pulses in two states, on= 1 or off= 0.

a)

True

b)

False

9.
Is this digital or analog?
a)
Digital 
b)
Analog
10.
Is this digital or analog?
a)
Digital 
b)
Analog
11.
Is this digital or analog?
a)
Digital 
b)
Analog
12.
Is this digital or analog?
a)
Digital 
b)
Analog
13.

The picture shows an example of what kind of signal?

a)

Analog

b)

Digital

14.
Morse code is a type of _____________ signal.
a)
digital
b)
analog
15.
Why are digital signals more reliable in transmitting information than analog signals? 
a)
They are more powerful
b)
They carry less information
c)
They have less interference over long distances
d)
They have more interference over long distances
16.
An analog signal is...
a)
continuous
b)
in pulses
17.

Identify a disadvantage of an analog signal:

a)

Requires low power

b)

Doesn't get interference

c)

When copied, quality goes down

d)

Hardware is usually small

18.
What is true about a digital signal?
a)
They are easily distorted or affected by interference
b)
They take up more space
c)
They require more information
d)
They are generally considered more reliable
19.
How can a signal be transmitted?
a)
Tone
b)
Light
c)
Electric Pulses
d)
All of the Above
20.
A signal is a way to transmit ________________ by means of gesture,action, sound, or other means.
a)
money
b)
information
c)
time
d)
light
21.

Which of the following is an advantage of analog signals

a)

Less prone to interference

b)

Requires less power

c)

Travels Farther

d)

Can carry more detailed information

22.
Is music playing from a record an analog or digital signal?
a)
Analog
b)
Digital
23.
Is a video game coded as analog or digital data?
a)
Analog
b)
Digital
24.
The string of 1s and 0s that control a computer is called _____ code.
a)
binary
b)
dichotomous
c)
Morse
d)
two-number
25.
Numbers in a digital code can have _____ values.
a)
any
b)
only high
c)
only low
d)
only set
26.
Numbers in an analog code can have _____ values.
a)
any
b)
only high
c)
only low
d)
only set
27.
Which type(s) of signal(s) can be easily corrected to remove noise?
a)
Analog
b)
Digital
c)
Both
d)
Neither
28.
Analog signals can be converted to digital through a process called _____.
a)
conversion
b)
processing
c)
sampling
d)
translation
29.
How do computer hard drives and USB drives store data?
a)
Binary code
b)
Pictures
c)
Symbols
d)
Words
30.
Which type(s) of signal(s) can be transmitted as radio waves?
a)
Analog
b)
Digital
c)
Both
d)
Neither
31.
Setting the color of each pixel on a computer screen requires a _____ signal.
a)
analog
b)
digital
c)
loud
d)
fast
32.
The signal above is an example of a(n)
a)
Digital Signal
b)
Analog Signal
33.
Which is an example of an analog signal?
a)
Record Player
b)
CD Player
34.
Which is an example of an analog signal?
a)
Blu-Ray DVD
b)
VHS Tape
35.

The picture shows an example of what kind of signal?

a)

Analog

b)

Digital

36.
Why are digital signals more reliable in transmitting information than analog signals? 
a)
They are more powerful
b)
They carry less information
c)
They have less interference over long distances
d)
They have more interference over long distances
37.
What is true about a digital signal?
a)
They are easily distorted or affected by interference
b)
They take up more space
c)
They require more information
d)
They are generally considered more reliable
38.

What kind a wave is pictured?

a)

Analog wave

b)

Digital wave

c)

Radiowave

d)

Microwave

39.

An example of a cell phone wave looks like

a)
b)
c)
d)
40.

Which wave represents past technology?

a)

Analog

b)

CD Audio

c)

DVD Audio

41.

This is a signal that fluctuates exactly like the original stimulus.

a)

Analog

b)

Digital

c)

High Definition

d)

Binary

42.

This is a signal where the data is represented by binary digits.

a)

DIgital

b)

Analog

c)

NTSC

d)

CRT

43.

This is a number system with the base of 2.

a)

Binary

b)

Analog

c)

Linear

d)

Progressive

44.

These are tiny light-sensitive elements that light up when hit by the beam.

a)

Pixels

b)

Electrons

c)

Frames

d)

Fields

45.

These are unwanted signals in video.

a)

Noise

b)

Pixels

c)

Electrons

d)

Flares

46.

Signals are composed of infinite possible values.

a)

Analog

b)

Digital

47.

Signals are composed of only two possible values: 0 or 1.

a)

Analog

b)

Digital

48.

Sound signal leaps from one value to another.

a)

Analog

b)

Digital

49.

Waves are smooth and continuous.

a)

Analog

b)

Digital

50.

Waves have a step-like appearance.

a)

Analog

b)

Digital

51.

Noise and distortion can be corrected easily.

a)

Analog

b)

Digital

52.

Signals are susceptible to “noise” and distortion.

a)

Analog

b)

Digital

53.

Music played from a record player

a)

Analog

b)

Digital

54.

Can be used to store and transmit large amounts of information (data)

a)

Analog

b)

Digital

55.

Has a limited capacity to store and transmit information (data)

a)

Analog

b)

Digital

56.

Represented by the grid, single strip alien drawings

a)

Analog

b)

Digital

57.

Examples: Photocopier, Landline Telephone, Cassette Tape

a)

Analog

b)

Digital

58.

Examples: Smartphone, Video Game Consoles, Computers

a)

Analog

b)

Digital

59.

A _______ is a random phenomenon arising due to some sort of a disturbance in the system and in most cases is undesirable.

a)

Noise

b)

Hiss

c)

Signal

60.

Example of signal

a)

Audio

b)

Video

c)

Speech

d)

Temperature

e)

All answers are correct

61.

Below are sample of signal, except

a)

Speech

b)

ECG

c)

EEG

d)

Noise

62.

Analog system used this device/s to change its characteristics in analog form.

a)

Filters

b)

Frequency analyzer

c)

Frequency multipliers

d)

All answers are correct

e)

All answers are wrong

63.

Digital signal processing provides an alternative method for processing the analog signal.

a)

TRUE

b)

FALSE

64.

This is the interface of analog signal and digital processor

a)

Analog-to-digital (A/D) converter

b)

Digital-to-analog (D/A) converter

c)

Both answers are correct

d)

Both answer are wrong

65.

This is needed if the end user is in analog form and need to interface from digital domain to analog domain.

a)

Analog-to-digital (A/D) converter

b)

Digital-to-analog (D/A) converter

c)

Both answers are correct

d)

Both answer are wrong

66.

Classification of Signals include the following, except

a)

M-dimensional signal

b)

One-dimensional signal

c)

N-dimensional signal

d)

Multichannel Signal

67.

Signal Model

a)

Random

b)

Deterministic

c)

both

d)

none

68.

This parameter is used to interpret the information content of a signal.

a)

Amplitudes

b)

Frequencies

c)

Phases

d)

All parameters

69.
What audio file format is best for use on the web?
a)
.MP3
b)
.MIDI
c)
.AAC
d)
.WAV
70.
Selena feels her video project’s audio needs less echo. Which of the following audio elements should she use?
a)
Audio effects
b)
Voiceover
c)
Background audio
71.
Eunice is maintaining the audio levels while her musician is recording a song.  What phase of production is Eunice in?
a)
Post-Production
b)
Pre-Production
c)
Production
d)
Final-Production
72.
Online services that allow users to listen to music as it is being downloaded uses what type of technology?
a)
Looping
b)
Streaming
c)
Recording
d)
Streaming
73.

Peak Meters are use to

a)

indicate the constant level of a signal

b)

indicate the transient peaks of a signal

c)

indicate the constant peaks of a signal

74.

VU meters are used to

a)

indicate the average constant level of a signal

b)

indicate the transient peaks of a signal

c)

indicate the constant signal of a signal

75.

A high pass filter is

a)

a filter with a bell shaped curve around the filters' active frequency

b)

a filter with a constant level after reaching the filters active frequency

c)

a filter that cuts the high frequency component of a signal

d)

a filter that cuts the low frequency component of a signal

76.

A low pass filter is

a)

a filter with a constant level after reaching the filters active frequency

b)

a filter with a bell shaped curve around the filters' active frequency

c)

a filter that cuts the high frequency component of a signal

d)

a filter that cuts the low frequency component of a signal

77.

.A compressor is

a)

an automatic fader

b)

a gain control

c)

a device that can reduce the dynamic range of program material

d)

All answers are correct

78.

Headroom is

a)

the level between the floor noise and the signal level

b)

the level between the minimum and maximum dynamic range

c)

the operating room between 0 db and distortion

d)

the area above the distortion level in a system

79.

Which of the following is not related to dynamic level processing?

a)

flanger

b)

limiter

c)

gate

d)

expander

80.

Reverb time (RT 60) is the amount of time it takes for a reverberated signal to reach -60db below the direct sound level.

a)

True

b)

False

81.

What does the "Q" of a filter refer to

a)

resonance

b)

bandwidth

c)

resonance and bandwidth

d)

none

82.

Which type of equalizer divides the frequency spectrum into several narrow bands?

a)

graphic

b)

parametric

c)

graphic and parametric

d)

none

83.

Why are gates used when miking a drum kit?

a)

used to isolate drum sounds on a track

b)

to allow drums to bleed together in mix

84.

which control is not typical on a compressor?

a)

Threshold

b)

Attack

c)

Release

d)

Ratio

e)

Frequency

85.

What is the purpose of the audio fader during recording?

a)

Controls how much audio goes out

b)

Controls how much audio comes in

c)

Controls the gain of the audio

86.

Kaitlyn is watching the controls as she is recording to make sure the volume does not go into the red area. What are the controls called?

a)

Digital Master

b)

VU Meter

c)

Master Volume

87.

Dallas would like to add a reverb to one of the tracks in his recording. Where would Dallas find reverb?

a)

Effects Rack

b)

Media Browser

c)

Channel Mixer

88.

Why is it important to understand how a mixing console works when recording audio?

a)

You will need to use one to record voiceovers

b)

You will need to use one to record instruments

c)

It is the basis for the interface in audio editing software

89.

When recording audio, how are the channels used?

a)

One channel records all the instruments and one records microphones

b)

Each channel records a separate audio input

c)

Only one channel can be recorded at a time

90.

Kim is placing background music under her voiceover in an advertisement. What editing technique should she use to remove part of the music at the end of the recording?

a)

Fading

b)

Looping

c)

Trimming

91.

When audio editing is complete, which of the following formats would be the best choice for export?

a)

.PNG

b)

.MP3

c)

.AVI

92.

Peak Meters are use to

a)

indicate the constant level of a signal

b)

indicate the transient peaks of a signal

c)

indicate the constant peaks of a signal

93.
Is music playing from a record an analog or digital signal?
a)
Analog
b)
Digital
94.
Is a video game coded as analog or digital data?
a)
Analog
b)
Digital
95.
The string of 1s and 0s that control a computer is called _____ code.
a)
binary
b)
dichotomous
c)
Morse
d)
two-number
96.
How do computer hard drives and USB drives store data?
a)
Binary code
b)
Pictures
c)
Symbols
d)
Words
97.
Analog signals can be converted to digital through a process called _____.
a)
conversion
b)
processing
c)
sampling
d)
translation
98.

Which type of signal is represented by discrete values?

a)

Nois signal

b)

Non linear

c)

Analog

d)

Digital

99.

x[n]=[1,2,3,4,5] is a

a)

Infinite duration sequence

b)

Finite duration sequence

100.

If x[n]=-x[n] then x[n] is

a)

Even signal

b)

Odd signal

101.

δ[n] \delta\left[n\right]\  can be represented as:

a)

u[n]+u[n+1]

b)

u[n-1]-u[n]

c)

-u[n-1]+u[n]

d)

u[n-1]-u[n+1]

102.

If x(n) and X(k) are an N-point DFT pair, then X(k+N)=?

a)

X(-k)

b)

-X(k)

c)

X(k)

d)

None of the mentioned

103.

If X1(k) and X2(k) are the N-point DFTs of X1(n) and x2(n) respectively, then what is the N-point DFT of x(n)=ax1(n)+bx2(n)?

a)

X1(ak)+X2(bk)

b)

aX1(k)+bX2(k)

c)

eakX1(k)+ebkX2(k)

d)

None of the mentioned

104.

  If x(n) is a real sequence and X(k) is its N-point DFT, then which of the following is true?

a)

X(N-k)=X(-k)

b)

X(N-k)=X*(k)

c)

X(-k)=X*(k)

d)

 All of the mentioned

105.

What is the circular convolution of the sequences X1(n)={2,1,2,1} and x2(n)={1,2,3,4}?

a)

{14,14,16,16}

b)

{16,16,14,14}

c)

{2,3,6,4}

d)

{14,16,14,16}

106.

Which of the following substitution is done in Bilinear transformations?

a)

s=2Ts[1−z−11+z−1]s=\frac{2}{T_s}\left[\frac{1-z^{-1}}{1+z^{-1}}\right]

b)

s=2Ts[1+z−11+z−1]s=\frac{2}{T_s}\left[\frac{1+z^{-1}}{1+z^{-1}}\right]

c)

s=2Ts[1−z−11−z−1]s=\frac{2}{T_s}\left[\frac{1-z^{-1}}{1-z^{-1}}\right]

d)

s=2Ts[1+z−11−z−1]s=\frac{2}{T_s}\left[\frac{1+z^{-1}}{1-z^{-1}}\right]

107.

If s = σ + jΩ and z = r ejω, then what is the condition on σ if r<1?

a)

σ > 0

b)

σ < 0

c)

σ > 1

d)

σ < 1

108.

What is the expression for the digital frequency when r=1?

a)

1Tstan⁡(ΩTs2)\frac{1}{T_s}\tan\left(\frac{\Omega T_s}{2}\right)

b)

2Tstan⁡(ΩTs2)\frac{2}{T_s}\tan\left(\frac{\Omega T_s}{2}\right)

c)

1Tstan⁡−1(ΩTs2)\frac{1}{T_s}\tan^{-1}\left(\frac{\Omega T_s}{2}\right)

d)

2Tstan⁡−1(ΩTs2)\frac{2}{T_s}\tan^{-1}\left(\frac{\Omega T_s}{2}\right)

109.

DFT is applied to

a)

Infinite sequences

b)

Finite discrete sequences

c)

Continuous infinite signals

d)

Continuous finite sequences

110.

The basic properties of DFT includes


1) Linearity

2) Periodicity

3) Circular symmetry

4) Summation

a)

1, 2 and 3 are correct

b)

1, 2 and 4 are correct

c)

1 and 3 are correct

d)

All the four are correct

111.

The circular convolution of two sequences in time domain is equivalent to

a)

Multiplication of DFTs of two sequences

b)

Summation of DFTs of two sequences

c)

Difference of DFTs of two sequences

d)

Square of multiplication of DFTs of two sequences

112.

Why freqz() function is used in MATLAB?

a)

to plot the magnitude

b)

To plot the angle

c)

To plot the Magnitude & phase with respect to frequency

d)

To plot the Magnitude & phase with respect to time

113.
The physical components of the computer system.  
a)
Hardware
b)
Software
c)
Input Device
d)
Output Device
114.
Technology's goal is to 
a)
improve the way people live
b)
give us cool inventions
c)
take all of our time away
d)
make us sleepy
115.
How does technology affect the way people communicate?
a)
it allows people to communicate with others quickly and at a low cost
b)
it makes people less motivated to communicate with others
c)
it does not affect the ways people communicate
d)
it makes it difficult to maintain privacy when communicating with others
116.
If you spent time before class talking to a friend, texted a friend last night after you finished your homework, emailed your sister in another city, snap chatted with your best friend, and by reading this question on Quizizz, you are doing this.
a)
transportating
b)
speaking
c)
communicating
d)
dreaming
117.
The physical parts of the computer are called:  ____________
a)
Binary Code
b)
Hardware
c)
Software
d)
Central Processing Unit
118.
The changes of technology overtime?
a)
digital revolution
b)
digital divide
c)
cyber-security
d)
evolving technology
119.

True or False: Communication is more than just talking face to face?

a)

True

b)

False

120.

What is the word or phrase that does not belong in each group?

a)
b)
c)
d)
121.

What is the word or phrase that does not belong in each group?

a)

an icon

b)

music

c)

some information

d)

picture

122.

What is the word or phrase that does not belong in each group?

a)
b)
c)
d)
123.

When was the first text message sent?

a)

1974

b)

1981

c)

1992

d)

1999

124.

Information that is sent as a pattern in a controlled flow of current through a circuit is called?

a)

wave pulses

b)

electronic signal

c)

binary code

d)

electromagnetic signals

125.

A wave pulse is considered

a)

a pulse of information sent as a pattern in a controlled flow of current through a circuit

b)

information sent as patterns in the form of electromagnetic waves, such as radio waves

c)

a pulse of energy that travels through the circuit when it is closed

126.

How can you get a higher quality digital signal from an analog recording?

a)

lower the amplitude of the analog signal

b)

raise the amplitude of the analog signal

c)

lower the sampling rate of the analog signal

d)

raise the sampling rate of the analog signal

127.

Binary code uses what type of symbols to communicate?

a)

bytes and digits

b)

analog and digital

c)

dots and dashes

d)

pixels and bits

128.

The period of time in which today's modern day technology exists is called...

a)

cell phone age

b)

technology age

c)

information age

d)

sharing age

129.

A computer engineer studying software would be focused on...

a)

the soft parts of technology, such as the rubber coating around the wires.

b)

the antenna within the technology that sends and receives the data

c)

the computer that runs the physical parts of the technology

d)

the programming that makes the physical parts of the technology run

130.

Fiber-optic cables are better than copper cables because...

a)

they carry less information

b)

they carry about a thousand times more information per second.

c)

they take up less space

d)

they take up more space

131.

"Noise" in information technology is considered

a)

small and large tubes

b)

a coded message like morse code

c)

random signals that alter information signals

132.

How are digital and analog recordings different?

a)

digital signals are continuous

b)

analog signals are higher resolution

c)

digital signals can be better stored electronically

d)

analog signals consist of numerical values recored at a specific time interval

e)

digital signals take up more space

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