8. Compare Common API Styles (REST, RPC, Synchronous, and Asynchronous) 200-901 Practice Questions (Page 5)

Questions 21–25

1. 21foundation · easy

   What is the main advantage of an asynchronous API over a synchronous API?

   • AThe server does not need to process the request at all
   • BThe client can send multiple requests without any rate limiting
   • CThe client always receives the response faster because the server prioritizes asynchronous requests
   • DThe client does not need to wait for the response and can continue with other tasks
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2. 22application · medium

   A network monitoring system needs to collect metrics from devices every 5 minutes. The system should be simple and not require complex event handling. Which API behavior is most appropriate?

   • AWebhooks that push metrics to the system every 5 minutes
   • BSynchronous API calls that fetch metrics and return them immediately
   • CRPC calls that block until metrics are available
   • DAsynchronous API calls that return a job ID and require polling for metrics
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4. 23application · medium

   A network engineer is writing a script that must validate a user's credentials against an authentication API before allowing the user to run a configuration command. The script cannot proceed until the authentication result is known. Which API behavior should the engineer choose?

   • ASynchronous API call that returns the authentication result in the HTTP response
   • BREST API call that returns a 202 Accepted status and processes the authentication in the background
   • CRPC API call that returns a job ID and requires polling for the result
   • DAsynchronous API call that sends a callback when authentication completes
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5. 24foundation · easy

   In a REST API, what does the statelessness constraint primarily require?

   • AThe server must respond with the same status code for every request
   • BThe server must not store any data between requests; all state is kept on the client
   • CThe server must use a single endpoint for all resources
   • DThe client must use only GET requests to retrieve resources
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6. 25application · medium

   A network management platform needs to integrate with a third-party service that exposes an API for managing network devices. The API uses URLs like '/devices/{id}' and HTTP methods like GET, POST, PUT, and DELETE. It does not maintain any client session state on the server. Which API style is this?

   • AAsynchronous API, because it does not maintain session state.
   • BREST API, because it uses resource-based URLs and HTTP methods, and is stateless.
   • CRPC API, because it uses action-oriented endpoints and typically uses JSON-RPC.
   • DSynchronous API, because it uses HTTP methods and returns responses immediately.
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