Answer / sudhakar8

error refers to difference between Actual Output and
Expected Output.
Failure is the inability of a system or component to
perform the required function according to its
specifications.
Fault is a condition that causes the software to a fail to
perform its required function.
Defect is a coding error in a computer program.

Answer / 007

error :a mistake in coding
defect:a mistake found by a tester while testing

Answer / yuvaraj

defect and fault : any deviation form actual to expected
error : introduce bug by human mistake
failure : mismatch between actual and expected is failure

Answer / amit m. turukamane

All these terms are inter-related
Error :any mistake due to human imperfection
Defect: the error may cause a defect
Failure: these defects may cause failure
Fault : is nothing but same as defect

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