mPHATEK Systems Senior Java Developer Interview Questions, Process, and Tips

API contract defines the rules and requirements for interacting with an API.

• API contract specifies the endpoints, methods, parameters, and data formats that can be used to access the API.

• It also includes information on authentication, rate limits, error handling, and versioning.

• Developers must adhere to the API contract to ensure proper communication and functionality.

• Examples: RESTful APIs typically have a clear API c...read more

OpenAPI specification is a standard for defining RESTful APIs.

• OpenAPI specification allows developers to describe APIs in a standardized format using YAML or JSON.

• It includes information such as endpoints, parameters, request/response formats, authentication methods, etc.

• Tools like Swagger UI can generate interactive API documentation based on OpenAPI specifications.

Load balancing in Kubernetes is achieved using a service called Kubernetes Service.

• Create a Kubernetes Service object with a type of 'LoadBalancer'

• The Service will automatically create an external load balancer that will distribute traffic to the pods in the service

• The load balancer will route traffic based on the service's selector

Rate limiting can be implemented using techniques like token bucket algorithm or sliding window algorithm.

• Implement token bucket algorithm to limit the number of requests a user can make within a certain time frame.

• Use sliding window algorithm to track the number of requests made in a specific time window and reject requests that exceed the limit.

• Consider using libraries like Guava RateLimiter in Java for easy implemen

API versioning is a practice of managing different versions of an API to ensure compatibility and smooth transitions for users.

• Use URL paths to differentiate between different versions of the API (e.g. /v1/resource vs /v2/resource)

• Include version information in the request headers (e.g. Accept header)

• Implement versioning through query parameters (e.g. /resource?version=1)

• Use custom media types to specify API versions (