Request/Response
Request Format
POST /products
{
"name": "Laptop",
"price": 999.99,
"categoryId": 1
}
Response Format
{
"id": 123,
"name": "Laptop",
"price": 999.99,
"category": {
"id": 1,
"name": "Electronics"
},
"createdAt": "2025-01-15T10:30:00Z"
}
Key Points
- Understanding API Design: Request/Response is essential for production systems
- Always consider scalability and maintainability
- Test thoroughly before deploying to production
- Monitor performance and set up alerting
Common Patterns
- Validation: Always validate input at the boundary
- Error Handling: Use structured error responses
- Logging: Log key events for debugging
- Testing: Unit, integration, and load tests
- Documentation: Keep docs updated with code changes
API Best Practices
Design Principles
- Use nouns, not verbs
- Plural resource names
- Consistent naming conventions
- Proper HTTP status codes
Versioning
- URI versioning (/v1/resource)
- Header versioning
- Deprecation policy
Documentation
- OpenAPI/Swagger specs
- Request/Response examples
- Error code documentation
- Rate limit documentation
Key Points
- Understanding API Design: Request/Response is essential for production systems
- Always consider scalability and maintainability
- Test thoroughly before deploying to production
- Monitor performance and set up alerting
Common Patterns
- Validation: Always validate input at the boundary
- Error Handling: Use structured error responses
- Logging: Log key events for debugging
- Testing: Unit, integration, and load tests
- Documentation: Keep docs updated with code changes
Practice Problems
Design and implement a solution for API Design: Request/Response in a backend system. Consider scalability, error handling, and production readiness.
Solution
// API Design: Request/Response implementation
// Key aspects: validation, error handling, logging, testing
public class APIDesignRequestResponse {
// Production-ready implementation
}Identify and handle edge cases for API Design: Request/Response. What happens under high load, with invalid input, or during failures?
Solution
// Edge case handling:
// 1. Null/empty input -> validation
// 2. High load -> rate limiting, queuing
// 3. Failures -> retries, circuit breaker
// 4. Concurrent access -> locks, idempotencyWrite a testing strategy for API Design: Request/Response. Include unit tests, integration tests, and performance tests.
Solution
// Test plan:
// - Unit: 80% coverage target
// - Integration: API contracts
// - Performance: latency, throughput
// - Chaos: failure injectionQuiz
1. Response should include?
2. DTOs are used for?
3. What is the primary purpose of API Design: Request/Response?
4. What is a common mistake when implementing API Design: Request/Response?
Flashcards
Question
Response includes?
Click to reveal answer
Answer
Data with nested resources
Question
DTOs purpose?
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Answer
Separate API contracts from entities
Question
What is API Design: Request/Response?
Click to reveal answer
Answer
API Design: Request/Response is a key concept in backend development.
Question
When to use API Design: Request/Response?
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Answer
Use API Design: Request/Response when building production systems that require reliability, scalability, and maintainability.
Question
API Design: Request/Response best practices
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Answer
Follow SOLID principles, write clean code, test thoroughly, document decisions, and monitor in production.
Revision Notes
Key Takeaways
- 1.Design clean request/response formats
- 2.Include nested resources in response
- 3.Use DTOs for API contract separation
- 4.Timestamps in ISO format
Interview Tips
- •Design request/response formats
- •Handle nested data
Cheat Sheet
Request/Response
- Clean JSON format
- Nested: include related resources
- DTOs: separate API from entities
- Timestamps: ISO format