What is the diff b/w Sanity & Smoke Testing?

Answer 1

In software testing:

They are pretty much the same, but perhaps this subtle difference;

Sanity testing is a preliminary check of functionality prior to execution of a comprehensive test suite. Just a quick inspection to instill sufficient confidence to proceed with formal testing. Participants generally have an expectation of success.

Smoke testing is similar, but often referenced in those situations where there is generally a much lower expectation of success, hence the term "smoke", as in the result of "crash and burn"!!!

The term "smoke" testing likely originates from the hardware side of the house, where electronic assemblies were likely to produce smoke upon application of power supply to circuitry.

Answer 2

Both have no relation at all with each other:)