railway RRB JE (CBT I + CBT II) Mock Test 2024 Signals and Systems Discrete Fourier Transform (DFT) and Discrete Fourier Series (DFS)
Consider the following statements with respect to Discrete Fourier Transform (DFT):
1. It is obtained by performing a sampling operation in the time domain.
2. It transforms a finite duration sequence into a discrete frequency spectrum.
3. It is obtained by performing a sampling operation in both time and frequency domains.
Which of the above statements is/are correct?1
1 and 2 only
2
2 and 3 only
3
1 only
4
3 only