The DFT of a signal x(n) of length N is X(k). When X(k) is given and x(n) is computed from it, the length of x(n)
(a) Is increased to infinity
(b) Remains N
(c) Becomes 2N – 1
(d) Becomes N2
The question was asked during an interview.
The query is from The Z-transform Analysis of Sampled-Data Control Systems in section Digital Control Systems of Control Systems