How about this? Defect : the main issue like not able to click certain button Bug : superset of defect which defines the defect in more detailed manner Failure : what failure you are facing because of defect .like in above case where certain button is not working and so are not able to fill the form which is failure Error : something not in the context of code which is still causing you a issue. Like url is crashing for some db related issue

As a tester, I see an ERROR that results in test FAILURE which is due to a DEFECT in code and so raised a BUG..... 😊😊😊😊

Couldn't agree more with you Mr.Expert ! Thanks for providing minute details on these terms. You have explained properly and precisely the difference between defect and bug. Somebody asked me the same question a day ago,will refer them to this video. Great quick video !

Thank you Naveen for sharing this in prompt time.

Here's my idea of the difference between the mentioned terms: Error - Discrepancy between observed and the expected behaviour/value/performance. Failure - Inability of a system or its components to perform it's required functions within specified performance requirements. Defect - The hinderances/blockages that causes test case failures. Bug - A documented log of a defect in Azure Devops/JIRA. Please correct if I'm wrong here.

Thanks a lot Naveen for such a wonderful explanation. 😊👍

They are nearly the same but different technically. This is how is flows in lifecycle ERROR -> BUG ->DEFECT -> FAILURE. Where is confuses people is Bug and Defect. Defect is from QA standpoint because when actually doesn't match the expected requirement. However its a bug in the system or application that cause that defect.

So much Thanks Naveen for this video. 💙 Google answers for this question were so confusing.

Thnku very much for share this.. I got this msg in my first interview and I got confused.. all seems same to me.

There is no difference between Defect and Bug in first place; Different test management tools have different term . For example HP ALM use the terms Defect where as Jira use the Bug term. Thats it No technical difference it is as simple as that.

Thank you Master😊

Can we say if an issue we find in lower environment or in a testing environment called defect...and if an issue we found on production called bug ?

Thanks naveen 👍

Have interview at 4. Hopefully this will be asked! 😁

Nicely Explained 👍

Much needed info for beginners..!! Thanks for sharing Naveen.

Thanks naveen

Defect when we are not getting expected output. Bug is mistake made by programmers. Failure when product fails to fulfill certain conditions.

Interviewer do ask this