# UGCNET-Dec2015-II: 46

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In software testing, how the error, fault and failure are related to each other?

1. Error leads to failure but fault is not related to error and failure
2. Fault leads to failure but error is not related to fault and failure

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ans is C error leads to fault and fault leads to error

Error is deviation from actual and expected value.

It represents mistake made by people.

Fault is incorrect step, process or data definition in a computer program which causes the program to behave in an unintended or unanticipated manner.

It is the result of the error.

Bug is a fault in the program which causes the program to behave in an unintended or unanticipated manner.

It is an evidence of fault in the program.

Failure is the inability of a system or a component to perform its required functions within specified performance requirements.

Failure occurs when fault executes.

A defect is an error in coding or logic that causes a program to malfunction or to produce incorrect/unexpected results.

A defect is said to be detected when a failure is observed.

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