1. What is an Error?
Any incorrect human action that produces a problem in the system is caller error.

2. What is a Defect?
Deviation between expected behaviour to actual behaviour of the system is called defect.

3. What is a Failure?

The deviation identified by end-user while using a system is called a failure.

1. What is Automation Testing?

Automation testing is the process of testing the software using an automation tool to find the defects. In this process, executing the test scripts and generating the results are performed automatically by automation tools. Some most popular tools to do automation testing are HP QTP/UFT, Selenium Web Driver, etc.,