Describe Distributed Applications Related to the Concepts of Front-End, Back-End, and Load Balancing 350-901 Practice Questions (Page 4)

Questions 16–20

1. 16application · medium

   A company is deploying a web application with a React front-end served as static files and a REST API back-end running on multiple servers. They want to ensure the front-end can be served from any server and the API requests are distributed evenly. Which architecture best meets these requirements?

   • AHost the front-end on one server and the API on another, with no load balancing.
   • BPlace a load balancer in front of the front-end servers and use DNS round-robin for the API.
   • CUse a reverse proxy to serve both the static files and API from the same server.
   • DServe the static front-end from a CDN and place a load balancer in front of the API servers.
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2. 17foundation · easy

   What is the primary purpose of separating front-end and back-end components in a distributed application?

   • ATo allow each component to be developed, deployed, and scaled independently
   • BTo ensure the application runs only on a single server
   • CTo eliminate the need for network communication between components
   • DTo combine all application logic into a single codebase
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4. 18expert · hard

   A company has a legacy application that is not designed for horizontal scaling. They want to introduce a load balancer to improve availability without changing the application code. Which feature is essential to keep the application functional?

   • ASSL termination
   • BSession persistence
   • CLeast connections algorithm
   • DHealth checks
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5. 19foundation · easy

   What is a primary role of an API gateway in a distributed application?

   • AProviding a single entry point for client requests and routing them to appropriate backend services
   • BManaging the underlying database schema and migrations
   • CCompiling front-end code into browser-compatible JavaScript
   • DStoring the application's static assets such as images and CSS files
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6. 20expert · hard

   A company is building a real-time collaboration application that uses WebSockets for live updates. The back-end consists of multiple servers that maintain WebSocket connections. They want to ensure that a user's connection is not dropped when the underlying server is restarted. Which approach is most appropriate?

   • AUse a message broker to synchronize state across servers
   • BImplement client-side reconnection logic
   • CUse sticky sessions on the load balancer
   • DUse a load balancer with least connections
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