What do you know about the software development lifecycle?

The Software Development Life Cycle (SDLC) is a structured process that defines the stages from idea creation to product decommissioning.

Main stages:

• Planning: Defining goals, scope, risks, resources, and timelines.
• Requirements Analysis: Gathering, documenting, and analyzing functional and non-functional requirements.
• Design: Developing system architecture, user interface design, data structures.
• Development: Writing and implementing code based on design decisions.
• Testing: Performing various types of tests (unit, integration, system, acceptance) to identify defects.
• Deployment/Implementation: Installing the system in the production environment and preparing for use.
• Operation and Maintenance: Monitoring, fixing errors, making changes, updating the system.

Popular SDLC models include:

• Waterfall: Sequential execution of stages. Suitable for projects with stable requirements.
• Iterative: Repeating development and testing cycles.
• Spiral: Combines iterative approach with risk management.
• Agile: Scrum, Kanban. Focuses on rapid delivery of value and adaptability to change.

The role of QA at each stage:

• Planning: Participating in risk assessment, defining testing strategy.
• Requirements Analysis: Analyzing requirements for clarity, completeness, consistency. Writing acceptance tests.
• Design: Analyzing design documentation, testing the design.
• Development: Module and integration testing by developers, writing automated tests (QA Automation).
• Testing: Executing test cases, regression testing, automating tests.
• Deployment/Implementation: Deployment testing, smoke testing.
• Operation and Maintenance: Analyzing feedback, testing bug fixes.

Understanding SDLC is critically important for QA as it helps identify the best moments for testing, choose the appropriate strategy, and ensure quality at all stages of development.