Question

What is the full form of BIBO?

(a) Boundary input Boundary Output

(b) Boundary Input Bounded Output

(c) Bonded Input Bonded Output

(d) Bounded Input, Bounded Output

The question was posed to me in an interview.

This intriguing question comes from BIBO Stability & Systems in the Time Domain topic in portion Signals and Systems Basics of Signals and Systems

Answer 1

Right answer is (d) Bounded Input, Bounded Output

To elaborate: BIBO stands for Bounded input, Bounded Output.  It gives the stability of a system through a simple explanation that a system will be stable if it’s both input and output are bounded i.e it is not infinity.