Q.1
Which of the following relation is true if the signal x(n) is real?
  • a) X*(ω)=X(ω)
  • b) X*(ω)=X(-ω)
  • c) X*(ω)=-X(ω)
  • d) None of the mentioned
Q.2
For a signal x(n) to exhibit even symmetry, it should satisfy the condition |X(-ω)|=| X(ω)|.
  • a) True
  • b) False
Q.3
Which of the following condition is to be satisfied for the Fourier transform of a sequence to be equal as the Z-transform of the same sequence?
  • a) |z|=1
  • b) |z|<1
  • c) |z|>1
  • d) Can never be equal
Q.4
If x(n) is a stable sequence so that X(z) converges on to a unit circle, then the complex cepstrum signal is defined as ____________
  • a) X(ln X(z))
  • b) ln X(z)
  • c) X-1(ln X(z))
  • d) None of the mentioned
Q.5
If a power signal has its power density spectrum concentrated about zero frequency, the signal is known as ______________
  • a) Low frequency signal
  • b) Middle frequency signal
  • c) High frequency signal
  • d) None of the mentioned
Q.6
What are the main characteristics of Anti aliasing filter?
  • a) Ensures that bandwidth of signal to be sampled is limited to frequency range
  • b) To limit the additive noise spectrum and other interference, which corrupts the signal
  • c) All of the mentioned
  • d) None of the mentioned
Q.7
What is the frequency range(in Hz) of Electroencephalogram(EEG)?
  • a) 10-40
  • b) 1000-2000
  • c) 0-100
  • d) None of the mentioned
Q.8
Which of the following electromagnetic signals has a frequency range of 30kHz-3MHz?
  • a) Radio broadcast
  • b) Shortwave radio signal
  • c) RADAR
  • d) Infrared signal
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