Choose invalid statement in context of software testing:

Question

Accepted Answer

The correct option is (4):
The statement "Release testing is performed after acceptance testing" is the **invalid** statement in the context of the standard software testing life cycle, which is why it is the correct answer to this question. In the typical flow, **Acceptance Testing** (often User Acceptance Testing or UAT) is the final stage of testing where the customer or client officially checks the system against the contract requirements to formally *accept* the software. **Release Testing** (or sometimes called Operational Acceptance Testing or Beta preparation) is fundamentally a quality assurance check performed by the development organization *before* the software is handed over to the client for UAT or released to the market. Therefore, release testing must logically occur *before* acceptance testing to ensure the build is stable and ready for client sign-off.

The incorrect option is (1):
The statement "System testing is usually done by the development team" is generally considered **valid**. System testing integrates all modules and tests the complete, fully integrated system to verify it meets the specified requirements. While an independent Quality Assurance (QA) team is often preferred for objectivity, the QA team is still part of the broader organization, and in many companies, system-level testing responsibilities are managed, performed, or at least closely involved with the original development and internal QA team before external parties (like customers) get involved. It represents an internal verification stage.

The incorrect option is (2):
The statement "Alpha testing is a type of user testing" is a **valid** description. Alpha testing is a form of user acceptance testing (UAT) that is performed by a small group of friendly, internal users or a select group of external users, but it takes place at the developer's site. It is distinct from Beta testing, which is performed by real users in their own environment. Because the actual *users* (or representatives of the user group) are actively testing the product for usability and functionality, it is correctly categorized as a type of user-centric testing.

The incorrect option is (3):
The statement "Release testing is usually a black-box testing" is **valid**. Black-box testing means the tester does not need to know the internal structure, code, or design of the system; they interact with the software purely through its user interface and external functionality. Release testing focuses on validating non-functional attributes like performance, stability, security, and the final end-to-end functionality from a deployment perspective, which perfectly aligns with the principles and techniques of black-box testing.