What types of testing do you know?

There are many types of testing, the main ones are:

• Functional testing — verifying that the functionality meets the requirements.
• Non-functional testing — testing performance, security, usability.
• Unit Testing — testing individual components or functions.
• Integration testing — checking the interaction between modules.
• System testing — testing the entire system as a whole.
• Acceptance Testing — verifying the product's readiness for use by the customer.
• Regression testing — ensuring that new changes haven't broken existing functionality.
• Performance testing (Load/Stress Testing) — testing system behavior under load.
• Security testing — identifying vulnerabilities.
• Automated testing — using scripts to automate tests.

Each type of testing addresses its own tasks and is often used in combination.