Fault-tolerance is a feature particularly sought-after in which of the following kinds of computer systems (choose all that apply):

A. desktop systems

B. laptop systems

C. handheld PDAs

D. business-critical systems

E. None of the choices.

Explanation:

Fault-tolerance enables a system to continue operating properly in the event of the failure of some parts of it. It avoids total breakdown, and is particularly sought-after in high-availability environment full of businesscritical systems.