DFT Efficient Computation on Digital Signal Processing related Questions and Answers

Question :   Which of the following is true in case of Overlap add method? 1. M zeros are appended at last of each data block 2. M zeros are appended at first of each data block 3. M-1 zeros are appended at last of each data block 4. M-1 zeros are appended at first of each data block Answer :   3 - M-1 zeros are appended at last of each data block