BIBO stability stands for which of the following?

BIBO stability stands for which of the following?

• A. Bounded Input-Buffered Output
• B. Bound Input-Bounded Output
• C. Bounded Input-Bounded Output
• D. Boundless Input-Output

Answer: (C)

Bounded Input, Bounded Output is the idea being tested. A system is BIBO stable when every input signal whose magnitude stays within some finite limit produces an output that also stays within some finite bound for all time. This ensures the system’s response remains predictable and finite as long as the input doesn’t blow up. The phrase is commonly stated exactly this way (often written with a comma or a dash), and that equivalently captures the requirement that the input bound maps to a finite output bound. Other phrasings that alter the meaning—for example implying outputs can become unbounded for bounded inputs or using terms that don’t reflect the input-output relationship—don’t describe BIBO stability.