One of the powers of digital signals processing is the ability to filter information to add effects - such as reverb - without loss of signal quality . This Book Contains Comprehensive up to date problems and solutions, Solved questions and Tutorial for a standard level on FIR, IIR, FFT, and DFT, Direct Convolution, Circular Convolution , and Design of a FIR filter, Z Transform. This Book helps the students and Lecturers during their researches, quiz, class test and exam.