I do agree with the above statement where nishi explained
but one this is wrong according statement.

Smoke testing is done first then comes the sanity testing.

Smoke teting is done by developers to check the basic code
part and there functionality is working fine or not before
giving the build to developers.

When it comes to testers they will do a sample round of
testing where we will be checking the basic functionality of
testing and give a clearance that this application meets the
minimum functionality to carry forward for other functional
testing.

rest of other things which nishi explained is right.


Always Smoke testing comes first then sanity testing.