Non competitive inhibition is
Features of noncompetitive inhibition

Inhibitor have no structural resemblance to substrate.
Mostly Irreversible (Except a few reversible non-competitive inhibition).
Excess substrate do not abolish the inhibition.
Km remains the same.
Vmax remains the same.

Features of competitive inhibition

Inhibitor will be structural analogue of substrate.
Reversible.
Excess substrate abolishes inhibition.
Vmax remains the same.
Km increases.
Reversible
Irreversible
Any of the above
None of the above