1 hour agoDevelopmentMaster LLM API basics, streaming, tool use, RAG, and backend security through 600 practice questions
Course Description
Building chat applications powered by large language models (LLMs) is one of the fastest-growing skill areas in software development today. This practice test series is designed to help you validate and deepen your understanding of the core concepts, architecture patterns, and production practices behind real-world LLM-powered chat applications — whether you're building your first chatbot or preparing for a technical interview.
Across 600 carefully written multiple-choice questions organized into 6 focused practice tests, you'll work through every major area of building a chat application on top of LLM APIs:
LLM API Fundamentals — request/response structure, tokens, context windows, authentication, and error handling
Conversation State & Context Management — managing multi-turn history, memory, and long-running conversations
Streaming Responses — how streaming works under the hood (SSE), and how to build responsive, incremental chat UIs
System Prompts, Tool Use & Function Calling — designing prompts and giving your model real capabilities through tools
Backend Architecture & Security — API key management, rate limiting, authentication, and multi-tenant safety
Production Concerns — cost management, resilience, deployment strategies, and Retrieval-Augmented Generation (RAG)
Every single question comes with a detailed explanation for all four answer options — not just the correct one — so you understand not only what's right, but why the other choices are wrong. This makes the tests as much a learning resource as an assessment tool.
Whether you're a developer building your first LLM-powered feature, a backend engineer studying production best practices, or someone preparing for a technical interview involving LLM API integration, this test series will help you build a solid, practical understanding of the entire chat application stack.
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