Types of Testing Methodologies in Software Quality Assurance (SQA)

When preparing for a Software Quality Assurance (SQA) interview, it's important to understand the various testing methodologies commonly used in the field. Here are some of the key types of testing methodologies you should be familiar with, along with explanations of their differences and when each one should be used:

1. Waterfall Testing

Waterfall testing is a linear and sequential approach to software testing, where each phase must be completed before moving on to the next. It is best suited for projects with well-defined requirements and where changes are not expected to occur frequently.

2. Agile Testing

Agile testing is an iterative and flexible approach that emphasizes collaboration and adaptability. It is well-suited for projects with evolving requirements and where frequent feedback and adjustments are needed.

3. Exploratory Testing

Exploratory testing involves simultaneous learning, design, and execution of test cases, based on testers' domain knowledge and experience. It is best used for uncovering defects or issues that may not be readily apparent through scripted tests.

4. Regression Testing

Regression testing involves re-testing existing functionality to ensure that new changes do not introduce unintended side effects or break existing features. It should be performed whenever new code is added or changes are made to the software.

5. Performance Testing

Performance testing is used to evaluate the speed, responsiveness, and stability of a software application under expected load conditions. It is essential for identifying performance bottlenecks and ensuring optimal system performance.

By being able to explain the differences between these testing methodologies and knowing when to apply each one, you can demonstrate your expertise in Software Quality Assurance during your interview.