Process of evaluation of Software application: To verify it satisfy the specified requirements With intent to find errors To Check if the system ?Fit for Purpose? Simulation of real time scenarios.
Testing is not a one-time activity—applications need to be tested throughout their lifecycle. Every version upgrade, module addition, or enhancement, as well as every implementation at a new site or increase in user load, needs to be put through comprehensive testing. The Program Doesn‘t Work Nobody would pay you to test if their program didn‘t have bugs. All programs have bugs. Any change to a program can cause new bugs, and any aspect of the program can be broken. You DON‘T ?verify that the program is working.? You FIND bugs. “If you set your mind to show that a program works correctly, you’ll be more likely to miss problems than if you want and expect the program to fail.” Complete Testing is Impossible:
1. There are a nearly infinite number of paths through any non-trivial program.
2. There are a virtually infinite set of combinations of data that you can feed the program.
You can’t test them all.
1. Therefore, your task is to find bugs --not to find all the bugs.
2. You want to find as many bugs as possible
3. Find the most serious bugs
4. Find bugs as early as possible
5. Your challenges will require judgment, trade-offs, and efficiency.
“Q: How many QA testers does it take to change a lightbulb?
A: QA testers don't change anything. They just report that it's dark.” Kerry Zallar?
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