{"slug": "show-hn-certarena-free-ai-certification-simulator-zero-deps-native-node-24", "title": "Show HN: CertArena – Free AI certification simulator (zero deps, native Node 24)", "summary": "CertArena launched as a free AI certification simulator built with zero dependencies on native Node 24, offering 26 scenarios covering AI fundamentals, Amazon Bedrock, responsible AI, and AWS security decisions. The tool runs 120-minute timed exam conditions with option strikethrough, an item flag review matrix, and 700+ scaled scoring, plus Kokoro TTS speech synthesis that reads stems and distractors aloud with live visual tracking. Practice tracks span Microsoft Foundry, Google Cloud, Amazon SageMaker AI, Databricks, Claude, and OpenAI APIs, with instant objective-by-objective accuracy breakdowns.", "body_md": "Practice AI fundamentals, Amazon Bedrock, responsible AI, and security decisions on AWS.\n\n**26 scenarios**· Kokoro audio\n\n120-minute timed exam conditions, option strikethrough, item flag review matrix, and 700+ scaled scoring.\n\nProduction enterprise scenarios testing cost, latency, context caching, tool calling, and governance constraints.\n\nKokoro TTS speech synthesis reads stems and distractors aloud with live visual tracking for hands-free audio study.\n\nInstant objective-by-objective accuracy breakdown to identify study gaps before booking your official exam.\n\nQuick drills, timed practice, or untimed interview scenarios.\n\nPractice AI concepts and lightweight applications with Microsoft Foundry, speech, vision, and information extraction.\n\nPractice generative AI use cases, Google Cloud offerings, output quality, and responsible business adoption.\n\nPractice data preparation, model development, deployment, and monitoring with Amazon SageMaker AI.\n\nPractice RAG, Vector Search, evaluation, deployment, and governance for LLM applications on Databricks.\n\nPractice agent architecture, tool use, context management, and reliability decisions with Claude.\n\nPractice Claude API integration, tool calls, prompt caching, and streaming behavior.\n\nPractice retrieval, deployment tradeoffs, privacy, and production operations for forward deployed engineering.\n\nPractice structured outputs, retrieval, tool calling, and application design with OpenAI APIs.\n\nNo tracks match that search. Try a provider name or a broader topic.\n\nStart with five scenarios or rehearse a larger set under a timer.\n\nRead the explanation, check its source, and revisit the questions that need work.\n\nSave topic results, keep a daily practice habit, and share a result when you want to.\n\nIndependent practice. Growing question banks. [How our questions and scoring work →](/about)\n\nRanked by practice score, then set size, then speed. One best timed practice result per learner and track. These are unproctored practice scores.\n\n| Rank | Candidate | Exam Track | Accuracy | Time | Streak | \n|---|---|---|---|---|---|\n\nYOUR PRACTICE WORKSPACE\n\nYour practice history, topic evaluations, and next steps.\n\nTopic accuracy across your saved attempts. Small samples are a starting point for more practice.\n\n| Date | Track | Mode | Accuracy | Time | Evaluation | \n|---|---|---|---|---|---|", "url": "https://wpnews.pro/news/show-hn-certarena-free-ai-certification-simulator-zero-deps-native-node-24", "canonical_source": "https://aicertarena.com/", "published_at": "2026-09-11 04:20:32+00:00", "updated_at": "2026-09-11 04:56:31.728857+00:00", "lang": "en", "topics": ["ai-products", "ai-tools", "ai-agents", "large-language-models", "ai-policy"], "entities": ["CertArena", "Node 24", "Amazon Bedrock", "Kokoro", "Microsoft Foundry", "Google Cloud", "Amazon SageMaker AI", "Databricks"], "alternates": {"html": "https://wpnews.pro/news/show-hn-certarena-free-ai-certification-simulator-zero-deps-native-node-24", "markdown": "https://wpnews.pro/news/show-hn-certarena-free-ai-certification-simulator-zero-deps-native-node-24.md", "text": "https://wpnews.pro/news/show-hn-certarena-free-ai-certification-simulator-zero-deps-native-node-24.txt", "jsonld": "https://wpnews.pro/news/show-hn-certarena-free-ai-certification-simulator-zero-deps-native-node-24.jsonld"}}