Difference between the smoke testing and sanity testing

Question

Accepted Answer

Smoke testing is a shallow and wide approach to testing while sanity testing is a narrow and deep approach to testing.

Smoke testing is done to ensure that the critical functionalities of the application are working fine after a build.
Sanity testing is done to ensure that the bugs reported in the previous build are fixed and the new functionalities added are working fine.
Smoke testing is done before the actual testing begins while sanity testing is done after the actual testing is completed.
Smoke testing is a subset of regression testing while sanity testing is a subset of acceptance testing.
Smoke testing is a quick and shallow test while sanity testing is a more thorough test.

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