API Design and Development

  1. API Architectural Styles and Paradigms
    1. Representational State Transfer (REST)
      1. Core Concepts and Terminology
        1. Resources
          1. Resource Identification
            1. Resource Representation
              1. Resource State
              2. Representations
                1. Media Types
                  1. JSON
                    1. XML
                      1. HTML
                        1. Custom Media Types
                      2. Uniform Interface
                        1. Standardized Operations
                          1. Self-Descriptive Messages
                        2. Architectural Constraints
                          1. Client-Server Separation
                            1. Statelessness
                              1. Cacheability
                                1. Layered System
                                  1. Code on Demand (Optional)
                                    1. Uniform Interface
                                    2. RESTful Best Practices
                                      1. Resource Naming Conventions
                                        1. HTTP Method Usage
                                          1. Status Code Selection
                                            1. Content Negotiation
                                            2. Richardson Maturity Model
                                              1. Level 0: Plain Old XML
                                                1. Level 1: Resources
                                                  1. Level 2: HTTP Verbs
                                                    1. Level 3: Hypermedia Controls
                                                    2. When to Choose REST
                                                      1. Use Cases and Limitations
                                                        1. Performance Considerations
                                                      2. GraphQL
                                                        1. Core Concepts
                                                          1. Schema Definition Language (SDL)
                                                            1. Type System
                                                              1. Scalar Types
                                                                1. Object Types
                                                                  1. Interface Types
                                                                    1. Union Types
                                                                      1. Enum Types
                                                                      2. Queries
                                                                        1. Field Selection
                                                                          1. Arguments
                                                                            1. Aliases
                                                                              1. Fragments
                                                                              2. Mutations
                                                                                1. Input Types
                                                                                  1. Payload Design
                                                                                  2. Subscriptions
                                                                                    1. Real-time Updates
                                                                                      1. Event Handling
                                                                                      2. Resolvers
                                                                                        1. Field Resolvers
                                                                                          1. Data Loading
                                                                                            1. N+1 Problem Solutions
                                                                                          2. Schema Design Patterns
                                                                                            1. Schema Stitching
                                                                                              1. Federation
                                                                                                1. Schema Evolution
                                                                                                2. Advantages over REST
                                                                                                  1. Preventing Over-fetching and Under-fetching
                                                                                                    1. Strongly Typed Schema
                                                                                                      1. Single Endpoint
                                                                                                        1. Introspection Capabilities
                                                                                                        2. Limitations and Trade-offs
                                                                                                          1. Caching Complexity
                                                                                                            1. Query Complexity
                                                                                                              1. Learning Curve
                                                                                                              2. When to Choose GraphQL
                                                                                                                1. Use Cases and Limitations
                                                                                                                  1. Client Requirements Analysis
                                                                                                                2. gRPC (gRPC Remote Procedure Calls)
                                                                                                                  1. Core Concepts
                                                                                                                    1. Protocol Buffers (Protobuf)
                                                                                                                      1. Message Definition
                                                                                                                        1. Field Types
                                                                                                                          1. Nested Messages
                                                                                                                            1. Repeated Fields
                                                                                                                            2. Service Definitions
                                                                                                                              1. RPC Methods
                                                                                                                                1. Request and Response Types
                                                                                                                                2. Communication Patterns
                                                                                                                                  1. Unary
                                                                                                                                    1. Server Streaming
                                                                                                                                      1. Client Streaming
                                                                                                                                        1. Bi-directional Streaming
                                                                                                                                      2. Code Generation
                                                                                                                                        1. Language Support
                                                                                                                                          1. Stub Generation
                                                                                                                                            1. Client Libraries
                                                                                                                                            2. Performance Advantages
                                                                                                                                              1. Binary Serialization
                                                                                                                                                1. Low Latency Communication
                                                                                                                                                  1. HTTP/2 Benefits
                                                                                                                                                  2. Interoperability and Language Support
                                                                                                                                                    1. Cross-Language Communication
                                                                                                                                                      1. Platform Support
                                                                                                                                                      2. Use Cases for High-Performance Microservices
                                                                                                                                                        1. Internal Service Communication
                                                                                                                                                          1. Real-time Applications
                                                                                                                                                        2. Other Paradigms
                                                                                                                                                          1. SOAP (Simple Object Access Protocol)
                                                                                                                                                            1. XML Messaging
                                                                                                                                                              1. WSDL (Web Services Description Language)
                                                                                                                                                                1. Strict Contracts
                                                                                                                                                                  1. WS-* Standards
                                                                                                                                                                  2. WebSockets
                                                                                                                                                                    1. Full-Duplex Communication
                                                                                                                                                                      1. Real-Time Applications
                                                                                                                                                                        1. Connection Management
                                                                                                                                                                          1. Message Framing
                                                                                                                                                                          2. Webhooks
                                                                                                                                                                            1. Event-Driven Communication
                                                                                                                                                                              1. Callback Mechanisms
                                                                                                                                                                                1. Retry Strategies
                                                                                                                                                                                  1. Security Considerations
                                                                                                                                                                                  2. Server-Sent Events (SSE)
                                                                                                                                                                                    1. One-Way Communication
                                                                                                                                                                                      1. Event Streaming
                                                                                                                                                                                        1. Browser Support
                                                                                                                                                                                        2. Message Queues and Event Streaming
                                                                                                                                                                                          1. Asynchronous Communication
                                                                                                                                                                                            1. Message Brokers
                                                                                                                                                                                              1. Event Sourcing

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                                                                                                                                                                                          1. Fundamentals of Application Programming Interfaces (APIs)

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                                                                                                                                                                                          3. Core Principles of API Design