The SRS document produced at the end of requirement analysis phase is called ........... specification.

Question

Accepted Answer

The correct option is (1):
The Software Requirements Specification (SRS) document, which is the key deliverable of the requirements analysis phase, is fundamentally a **Black box** specification. The term 'Black Box' in software engineering implies defining the system solely based on its external behavior—what it does, its inputs, and its outputs—without needing to know or detailing its internal workings, code structure, or design implementation. The SRS is meant to be a contract between the customer and the developers, focusing on the functional and non-functional requirements from the customer's point of view, which aligns perfectly with the black-box concept.

The incorrect option is (2):
White box refers to White Box Testing (or glass-box testing), which is an internal testing method that requires knowledge of the system's internal structure and code. This approach tests the *how* of the system's implementation, such as checking internal paths, conditional logic, and code flow. This detailed, internal perspective is entirely contrary to the purpose of the SRS, which is produced *before* the system's design and coding begin. Therefore, the requirements document cannot be called a White box specification.

The incorrect option is (3):
The term Unit relates to a 'Unit' of software, typically the smallest testable part, like a function or a class method, and is strongly associated with Unit Testing. A Unit specification would detail the requirements for an individual component. However, the SRS document describes the requirements for the **entire** system, which is a high-level view that integrates all units. Thus, describing the comprehensive SRS as a mere Unit specification is inaccurate and insufficient in scope.

The incorrect option is (4):
Alpha is a term that denotes an early stage of testing, specifically Alpha Testing, which is performed by internal testers before a beta release. It is a phase in the testing life cycle and does not refer to a type of requirements specification document. The term "Alpha specification" is not a standard software engineering term used to classify the SRS. The SRS document governs the subsequent design, implementation, and testing phases (including alpha testing), but it is not named after one of the later testing stages.