What is software testing and why does it matter?
FundamentalsJunior
In shortSoftware testing is checking that an app does what it should and finding problems before users do. It matters because bugs found late cost more money, time and trust.
Model answer
Software testing is the process of checking that an app or website works as expected and meets the needs of its users, and finding defects before real people run into them.
It includes running the software (clicking, tapping, typing, breaking things on purpose) and also reviewing requirements and designs early, before any code is written.
Why it matters:
- Cost. A bug found while reviewing a requirement costs minutes to fix. The same bug found after release can mean hotfixes, app store reviews and support tickets.
- Trust and money. If a banking app shows the wrong balance or a shop’s checkout fails, users leave and may not come back.
- Safety and legal risk. Some bugs leak personal data or break accessibility laws.
For example, if a food delivery app charges the card but does not create the order, users lose money and the company loses customers and reputation.
One important point: testing cannot prove there are no bugs. It reduces risk and gives the team information to decide whether the product is ready to release.
Learn more: What Is Software Testing?
What they're looking for
A clear, simple definition plus the business reason for testing (risk, cost, user trust), ideally with a real example.
Common mistakes
- Saying testing proves the software has no bugs.
- Only talking about finding bugs and forgetting about checking requirements and user needs.
- Giving a textbook definition with no example.