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Digital Signal Processing Skill Assessment
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Quiz # 1
Digital Signal Processing Quiz # 1
Instructions
Quiz:
Digital Signal Processing Quiz # 1
Subject:
Basic Digital Signal Processing
Total Questions:
73 MCQs
Time:
73 Minutes
Note
Do not refresh the page while taking the test.
Results along with correct answers will be shown at the end of the test.
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Digital Signal Processing Quiz # 1
End Quiz
Question
1
of 73
00:00
The periodogram is _________.
not a consistent estimate of the true power density spectrum
a consistent estimate of the true power density spectrum
not a consistent estimate of the true energy density spectrum
a consistent estimate of the true energy density spectrum
Thermal noise can be considered to be ___________.
white non-Gaussian noise
white Gaussian noise
flicker noise
transit time noise
For the signal x ( t ) = 3cos50πt + 10sin300πt – cos100πt , nyquist rate is________.
150 Hz
300 Hz
100 Hz
50 Hz
If a Z-Transform is evaluated on the unit circle at evenly spaced points only, it becomes __________.
FFT
DTFT
FT
DFT
In DFT, a circularly folded sequence is denoted by_________.
x (( n ))
x (( n/2 ))
x (( 2n ))
x (( -n ))
A non-periodic signal has a period ( T ) of _______.
T = ∞
T = 0
T = 1
T = 2
The Discrete Fourier Transform ( DFT ) of unit impulse function is__________.
Zero
Infinity
1
2
How many clock cycles are required by the DSP processor to execute an instruction?
One
Two
Four
Eight
In order to design digital filter, an important condition is that, the response of filter should ___________.
causal
non-causal
time-variant
time-invariant
Sampling rate conversion by the rational number ( I / D = 1023 / 511 ) needs a polyphase filter with _________.
511 subfilters
500 subfilters
1000 subfilters
1023 subfilters
Environmental parameters like temperature, humidity etc. change the performance of __________.
analog filters only
digital Filters only
Both analog and digital filters
Neither analog nor digital filters
The multiplication of two DFTs is equivalent to the circular convolution of their sequences in the _____________.
frequency domain
time domain
Both frequency and time domains
Neither frequency nor time domain
A continuous time signal is said to be symmetrical or even if it satisfies the condition, _________.
x ( t ) = x ( t/2 )
x ( t ) = x (√t )
x ( t ) = x ( 2t )
x ( t ) = x ( -t )
Which one of the following is not a register associated with the Program Sequencer?
Arithmetic Status Register (ASTAT)
Stack Status Register (SSTAT)
Mode Status Register (MSTAT)
System Register
Digital F.I.R. filters are so designed that they have linear phase characteristics in the _____________.
stop band
pass band
low pass band
high pass band
Continuous time signals have_____________.
periodic spectra
discrete spectra
aperiodic spectra
continuous spectra
The condition of periodicity for a discrete time signal can be defined mathematically as ________. (Note: Here Number "N" is the period of the signal.)
x ( n ) = x ( n + N/2 )
x ( n ) = x ( n + 2N )
x ( n ) = x ( n + N )
None of the above
MAC is used for ___________.
high speed addition
high speed multiplication
high speed division
high speed subtraction
Quantization of a signal_____________.
reduces bandwidth requirement
increases bandwidth requirement
does not have any effect on bandwidth
The fundamental period of signal 10sin(12πt) + 4sin(18πt) is______.
2/3 Sec
1/2 Sec
1/3 Sec
1/4 Sec
Which one of the following is a static system?
y ( n ) = x ( n2 )
y ( n ) = x ( n ) - 3 x (n - 2)
y ( n ) = x ( - n )
y ( n ) = n x ( n )
Signals that are statistically stationary can be better estimated with _________.
Short data record
Long data record
Average data record
In order to avoid aliasing during the reduction of the sampling rate, we divide the sampling frequency by ___________.
D
2D
4D
8D
Interfacing of digital systems with different sampling rates can be done efficiently by __________.
reduction of the sampling rate
interpolation of the sampling rate
both reduction and interpolation of the sampling rate
keeping the sampling rate constant
In DFT equation, the symbol for circularly even sequence is _________.
x (( n ))
x (( n - k ))
x (( -n ))
x ( N-n ) = x ( n )
Which of the following is a non-causal system?
y ( n ) = x ( n ) + x ( n - 2 )
y ( n ) = e x (n)
y ( n ) = cos x ( n )
y ( n ) = x ( n ) + n x ( n - 1 )
The type-1 chebyshev filter contains __________.
all zeros
all poles
zeros as well as poles
No poles and zeros
A continuous time signal is also known as a/an_______.
analog signal
digital signal
even signal
odd signal
The ADSP-2100A has ____________.
no on-chip memory
on-chip memory
attached memory
both on-chip and attached memories
What is the function of a Fourier Transform?
It converts the time domain signal into the frequency domain signal
It converts the frequency domain signal into the time domain signal
It converts the time domain signal into the phase domain signal
It converts the frequency domain signal into the phase domain signal
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