DX Spring Menu Practice Test

The main idea being tested is how API versioning helps evolve a service without breaking existing clients, and how teams manage those changes over time. The primary purpose is to preserve backward compatibility so current integrations keep working while new features or changes can be introduced in newer versions. Having a clear versioning approach also supports a structured deprecation plan, guiding clients to migrate gradually rather than forcing abrupt changes. Among the common strategies, including the version in the URL is straightforward: the version appears in the path (for example, /api/v1/...); it’s easy to route, cache, and understand at a glance, though it can require having multiple code paths for different versions. Versioning through a request header moves the version indicator out of the URL and into headers, which keeps URLs tidy but can complicate caching and proxy behavior since caches often key on URLs. Content negotiation uses the media type, such as a vendor-specific type like application/vnd.company.v1+json, aligning versioning with the data format itself; this approach is flexible for clients that understand the media type but increases the complexity of client requests and server content negotiation. Options that focus solely on security without versioning, force the latest features regardless of existing integrations, or pretend versions don’t exist miss the core purpose: balancing stability for current clients with the ability to evolve the API.