Beginner LevelSoftware Engineering Principles
What are Architecture Decision Records (ADRs) and Documentation-as-Code?
❓ Interview Prompt: Explain Architecture Decision Records (ADRs), recording technical decisions in Git, MADR templates, and Documentation-as-Code.
Architecture Decision Records (ADRs) are lightweight text documents stored directly in a project's Git repository to capture significant architectural decisions along with context and trade-offs:
ADR Structure (MADR Format):
1
Title: 'ADR-005: Adopt PostgreSQL for Order Service'.
2
Status: Proposed / Accepted / Superseded.
3
Context: Why are we making this decision?
4
Decision: What architecture option was selected?
5
Consequences: Positive and negative trade-offs.
Code Implementation Example
markdown
# ADR 003: Use Redis for Distributed Rate Limiting
## Status
Accepted
## Context
Our API gateway cluster requires shared atomic counters to enforce rate limits across node replicas.
## Decision
We will use Redis with Lua scripts for sliding window rate limiting.
## Consequences
Requires maintaining a high-availability Redis cluster.💡Formatting an Architecture Decision Record (ADR) in Markdown.
🎯 Interview Key Takeaway
Use ADRs stored in Git to document key technical decisions, trade-offs, and historical context for engineering teams.
#ADR#Documentation#Architecture#Beginner
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