The primary objective of system testing is to ensure that the entire software system, as a whole, functions correctly. It focuses on verifying that all components work together and meet the requirements. This testing level assesses the system's behavior and functionality, including interfaces between components.

An "informal" review is typically led by the author of the work product, and it is a less formal meeting compared to formal reviews such as inspections. Informal reviews are often more relaxed and collaborative, focusing on open discussions and quick feedback. They are valuable for catching minor issues and fostering teamwork.

The Institute of Electrical and Electronics Engineers (IEEE) is responsible for developing standards for software engineering. These standards cover various aspects of software development and help ensure consistency and quality in software engineering practices.

Establishing an effective testing environment is crucial because it simulates the production environment in which the software will be used. This allows testers to identify issues that may not appear in a different environment and ensures that the software behaves as expected in real-world conditions.

Complexity is a software quality metric that is often used to identify the complexity of a software program. It measures how intricate or convoluted the code is, which can impact maintainability and understandability.

In this scenario, usability should be prioritized differently for various user groups. Novice users might need a more intuitive interface, while expert users may require advanced features and shortcuts. Customizing usability for different user types ensures a positive user experience for all.

HTTP (Hypertext Transfer Protocol) is commonly used for making API requests on the web. It is a protocol that allows data to be transferred between a client and a server, making it a fundamental part of web-based API communication.

System testing ensures correct behavior in all intended environments by simulating real-world scenarios, which helps identify any issues or conflicts that might occur in different situations. This comprehensive testing approach checks how the software responds to a variety of conditions, ensuring robustness.

One primary reason for conducting white box testing is to ensure code quality and reliability. This technique helps identify defects, vulnerabilities, and areas of code that may lead to software failures or security issues.

In Agile, the QA team plays a collaborative role, working closely with developers, testing continuously, and ensuring the quality of the product. In Waterfall, the QA team often focuses on post-development testing. Agile emphasizes early and continuous quality assurance as part of the development process.