Q.1 What do you mean by under sampling?
A) Sampling the signal at Nyquist rate.
B) Sampling the signal below the Nyquist rate.
C) Sampling the signal greater than or equal to Nyquist rate.
Q.2 What is the use of anti - aliasing filter?
A) It is used for reconstruction of a signal.
B) It is used to restrict the bandwidth of a signal to satisfy the sampling theorem and to prevent aliasing.
Q.3 A signal can be reconstructed from its samples by using which method?
A) Filtering
B) Resampling
C) Auto - correlation
Q.4 Computation of DFT involves?
A) Sampling in time domain.
B) No sampling.
C) Sampling in frequency domain.
D) Sampling in both time and frequency domain.
Q.5 With increasing sampling frequency fs, the mean square error of the reconstructed output w.r.t the original signal?
A) Increases
B) Remains unaffected
C) Almost zero
D) Remains constant after initial decrease
