Software Development Life Cycle

SDLC is a structured process for planning, creating, testing, and deploying software.

Models

• Waterfall — sequential phases
• Agile — iterative sprints
• DevOps — continuous delivery
• Scrum — Agile framework with roles

Syntax

COMPUTER-SCIENCE

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Waterfall: Requirements → Design → Build → Test → Deploy
Agile: Sprint 1 → Sprint 2 → Sprint 3 → ...
DevOps: Plan → Code → Build → Test → Release → Deploy → Monitor

SDLC Phases

PYTHON

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phases = [
    ("Planning", "Requirements gathering, feasibility"),
    ("Analysis", "Detailed requirements, use cases"),
    ("Design", "Architecture, UI/UX, database design"),
    ("Implementation", "Coding, unit testing"),
    ("Testing", "Integration, system, UAT testing"),
    ("Deployment", "Release, monitoring, maintenance")
]

print("Software Development Lifecycle:")
for i, (phase, desc) in enumerate(phases, 1):
    print(f"  {i}. {phase:15} | {desc}")

Try It Yourself

Practice

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Exercise

What are the phases of the Waterfall model?

Answer

Requirements, Design, Implementation, Testing, Deployment, Maintenance.

Quick Quiz

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Which methodology uses sprints?

Waterfall

Agile

V-Model

Prototype

Agile uses short iterations called sprints.

Retry Quiz

Interview Questions

What is the difference between Agile and Waterfall?

Waterfall is sequential and rigid. Agile is iterative and flexible, delivering working software in short cycles.

Tutorial Complete

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