Control Systems
The open loop transfer function of a unity feedback control system is given by G(s) = k/s(s+1). If gain k is increased to infinity, then damping ratio will tend to become

 infinite
 zero
 unity
 0.707

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Control Systems
For a transfer function H (s) = P(s) / Q(s), where P (s) and Q (s) are polynomials in s. Then

 maximum degree of P (s) and Q (s) differ at most by one.
 the degree of P (s) and Q (s) are same.
 the degree of P (s) is always greater than the degree of Q (s).
  degree of P (s) is independent of degree of Q (s).

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