have 9 year experience in manual testing,Testcase design,test case execution,validation and verification.Build approved for testing,peer review,function review of Epic. API testing,Usability Testing,Smoke testing,functional testing,workflow develop and design, in this method the tester plays an important role of end user and verifies that all the features of the application are working correctly. The tester manually executes test cases without using any automation tools.software testing method in which the internal structure/design/implementation of the item being tested is not known to the tester. These tests can be functional or non-functional, though usually functional. Test design techniques include Equivalence partitioning, Boundary Value Analysis, Cause-Effect Graphing. Software testing lays down the mechanism for finding defects in an application, product or system. A Defect is a deviation between the actual and expected outcomes. A mistake in the source code indicates Error. The error uncovered by a tester becomes a Defect. The defect recognized by the dev team turns into a Bug. If a product build doesn’t pass the acceptance criteria, then it proves to be a Failure. Hence, all these testing terms revolve around the defect. Let’s understand it in more details. Defect In Manual Testing 1. Wrong- 2. Miss- 3. Error- An error could arise because