What is Software Testing? Introduction, Definition, Causes of errors & Testing Types
August 28, 2025
What is Software Testing? Introduction, Definition, Causes of errors & Testing Types
Welcome to this Post – ” What is Software Testing? Introduction, Definition, Causes of errors & Testing Types”.
This post discusses about the ” What is Software Testing? Introduction, Definition, Causes of errors & Testing Types”. We will focus on definitions, causes or factors leading to errors or faults in the software plus the types of testing that can be taken into account in the complete product lifecycle.
So, go ahead and enjoy reading…
What is Software Testing?
Software testing is called as a method to draw conclusion whether software is working as per requirements and the actual results match the expected results to ensure that the software system is defect or error free.
The software testing is done differently in different context. This may involve execution test cases for a simple software component or composite system component to evaluate one or more properties of interest.
There are few points which adds up to this definition:
- Software testing is collective process and not a single activity.
- The software testing takes part in all phases of product development lifecycle.
- The testing is done usually by running code (dynamic testing) and by not running code i.e. only reviewing the code (static testing).
- Testing involves proper planning of all the parts of testing from its scope, execution to reporting.
- Testing proofs the point that “Are we building the right product?” (Validation)
- Testing helps in justifying the statement “Are we building the product right?” (Verification).
What are the causes of software defects or errors?
When any of us uses the software in an inappropriate way, leading the software into “error” mode is actually a problem. This problem must have been uncovered before the product has been released to check all its loose ends.
Plus, when these errors are severe, in the sense, they might halt the software in working properly or fails the system as a whole to work as intended then it is called as “software failure”.
As we know software testing helps to uncover and identify errors, gaps or missing requirements with respect to the actual requirements. On the other hand, we also know development team working on a unit of software may not have visualized the product or software that much the way they should which leads to lot of errors or defects which might be occurring in the software unit or component, or set of software components.
This is where testers take the lead to test in integration, the software as a module or whole, and start from unit to final release version of product. The testers may take any road to complete the task as what matters is the context.
Let’s see what all testing types can be part of complete software testing lifecycle.
Types of Software Testing
Typically Testing is classified into three categories.
- Functional Testing
- Non-Functional Testing or Performance Testing
- Maintenance (Regression and Maintenance)
| Testing Category | Types of Testing |
| Functional Testing | · Unit Testing
· Integration Testing · Smoke · UAT (User Acceptance Testing) · Localization · Globalization · Interoperability |
| Non-Functional Testing | · Performance
· Endurance · Load · Volume · Scalability · Usability |
| Maintenance | · Regression and Retesting
· Maintenance |
Conclusion:
Thus, we can say that software testing is not just a common perception that it only consists of running test is not complete. Instead it the testing itself differs in the context it is being asked for, example from unit to acceptance testing, provided we remember that objectives these different levels of testing differ in product lifecycle.
