• .PNG
• .MP3
• .AVI
• All of above

• System
• Noise
• Frequency
• None

• Nois signal
• Non linear
• Analog
• Digital
• #### 4.  DTFT is the representation of

• Periodic Discrete time signals
• Aperiodic Discrete time signals
• Aperiodic continuous signals
• Periodic continuous signals
• #### 5.  As compared to the analog systems, the digital processing of signals allow1) Programmable operations2) Flexibility in the system design3) Cheaper systems4) More reliability

• 1, 2 and 3 are correct
• 1 and 2 are correct
• 1, 2 and 4 are correct
• All the four are correct

• log2M
• Mlog2M
• (M-1)log2M
• Mlog2(M-1)

• Looping
• Trimming
• All of above

• True
• False
• #### 9.  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)?

• X1(ak)+X2(bk)
• aX1(k)+bX2(k)
• eakX1(k)+ebkX2(k)
• None of the mentioned
• #### 10.  Why is it important to understand how a mixing console works when recording audio?

• You will need to use one to record voiceovers
• You will need to use one to record instruments
• It is the basis for the interface in audio editing software
• All of above
• #### 11.  The condition for a system to be causal is

• All poles of its transfer function must be left half of s-plane
• All poles of its transfer function must be right half of s-plane
• All zeros of its transfer function must be right half of s-plane
• All zeros of its transfer function must be left half of s-plane
• #### 12.  Eunice is maintaining the audio levels while her musician is recording a song. What phase of production is Eunice in?

• Post-Production
• Pre-Production
• Production
• Final-Production
• #### 13.  Telegraph signals are examples of

• Digital signals
• Analog signals
• Impulse signals
• Pulse train
• #### 14.  When recording audio, how are the channels used?

• One channel records all the instruments and one records microphones
• Each channel records a separate audio input
• Only one channel can be recorded at a time
• All of above
• #### 15.  What is the configuration of system for digital processing of an analog signal?

• Analog signal->Pre-filter ->D/A Converter -> Digital Processor -> A/D Converter -> Post-filter
• Analog signal-> Pre-filter ->A/D Converter -> Digital Processor -> D/A Converter -> Post-filter
• Analog signal-> Post-filter ->D/A Converter -> Digital Processor -> A/D Converter -> Pre-filter
• None of the above

• flanger
• limiter
• gate
• expander
• #### 17.  Which of the following characterizes an analog quantity?

• Discrete levels represent changes in a quantity.
• Its values follow a logarithmic response curve.
• It can be described with a finite number of steps.
• It has a continuous set of values over a given range.
• #### 18.  The condition for a system to be stable is

• All poles of its transfer function lie on the left half of s-plane
• All poles of its transfer function must be right half of s-plane
• All zeros of its transfer function must be right half of s-plane
• All zeros of its transfer function must be left half of s-plane
• #### 19.  The basic properties of DFT includes1) Linearity2) Periodicity3) Circular symmetry4) Summation

• 1, 2 and 3 are correct
• 1, 2 and 4 are correct
• 1 and 3 are correct
• All the four are correct

• .MP3
• .MIDI
• .AAC
• .WAV
• #### 21.  Y[n] = x[n]* δ[n]\delta\left[n\right]δ[n] is

• x[n]
• \delta\left[n\right]δ[n]
• 1
• x[n] \delta\left[n\right]δ[n]

• 2
• 4
• 8
• 16
• #### 23.  Why are gates used when miking a drum kit?

• used to isolate drum sounds on a track
• to allow drums to bleed together in mix
• #### 24.  If x(n) is a real sequence and X(k) is its N-point DFT, then which of the following is true?

• X(N-k)=X(-k)
• X(N-k)=X*(k)
• X(-k)=X*(k)
• All of the mentioned
• #### 25.  Quantized and coded version of the discrete time signals are

• Analog signals
• Digital signals
• Both A and B
• Coded signal
• #### 26.  What is the transform that is suitable for evaluating the z-transform of a set of data on a variety of contours in the z-plane?

• Goertzel Algorithm
• Fast Fourier transform
• Chirp-z transform
• None of the mentioned

• Threshold
• Attack
• Release
• Ratio
• Frequency
• #### 28.  If x(n) and X(k) are an N-point DFT pair, then X(k+N)=?

• X(-k)
• -X(k)
• X(k)
• None of the mentioned

• re-j2πkn/N
• rejπkn/N
• rej2πkn
• rej2πkn/N
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