Software Testing Terms include : 1) Error 2) Bug 3) Fault 4) Defect 5) Failure What is the Relationship of first three terms with defect and failure?

1. Error Bug Fault
(Relationship with Defect & Failure)
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2. What is Error?
 The Error is a human mistake.
 An Error appears not only due to the logical mistake in the code made by
the developer.
 Types of Errors: -
 Syntactic Errors
 Calculation Errors
 Error Handling Errors
 Hardware Errors
 For Example. Syntax Error Caused in the Coding By Development Team.
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3. What is Bug?
 A bug is nothing but a programming error found in an application before
it goes into production.
 Types of Bugs: -
 Algorithm Bugs (Division By Zero)
 Logic Bugs (Infinite Loop Having No Termination Point)
 Resource Bugs (Uninitialized Variables)
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4. What is Fault?
 Fault is defined as the deviation from the actual and expected result of
application or software.
 Reasons for Fault: -
 Any deviation from the customer requirements is called as Fault.
 By giving wrong input may lead to Fault.
 Any error in logic code may lead to Fault.
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5. Relationship Between Defect & Failure
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1) Error found by tester is called defect
2) Defect accepted by development team is called Bug.
3) Build does not meet the requirements then it is Failure.

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