Describe the trial-and-error method of troubleshooting and when it should and shouldn't be used.

What will be an ideal response?

Trial-and-error approaches involve assessment of the issue, followed by making an educated guess as to the cause and then applying a solution. This method is particularly risky in high-availability environments and generally should only be used on test systems or systems without critical data. The method also is acceptable when changes can be undone quickly and easily.