Multiple choice

A system with transfer function H(z) has impulse response h(.), defined as h(2) = 1, h(3) = - 1 and h(k) = 0 otherwise. Consider the following statements.

S1 : H(z) is a low-pass filter. S2 : H(z) is an FIR filter.

Which of the following is correct?

  1. Only S2 is true

  2. Both S1 and S2 are false

  3. Both S1 and S2 are true, and S2 is a reason for S1

  4. Both S1 and S2 are true, but S2 is not a reason for S1

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A Correct answer
Explanation