Life & fun · September 4, 2026
ExamCaliber
Free ISTQB and A4Q mock exams with explained answers
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ExamCaliber offers free full-length mock exams for ISTQB and A4Q certifications, with original questions and a written explanation on every answer option.
Free full-length ISTQB and A4Q mock exams — 1,458 practice questions with a written rationale behind every answer option. No sign-up, no paywall.
Full-length practice exams for ISTQB and A4Q certifications, in the same format as the real exam: 40 questions, 60 minutes, 65% to pass. Every answer option gets a written rationale — not just the correct one. The A4Q Selenium Tester certification — automating browser tests with Selenium WebDriver: locators, the Page Object Model, waits and synchronisation, browser interactions and test stability. The core ISTQB foundation certification — fundamentals of testing, the test process, techniques and tool support. Testing of and with AI-based systems — quality characteristics, ML data, model testing and explainability. The ISTQB Advanced Level Agile Tester certification (v2.0, released 17 April…from examcaliber.com
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Hi HN, I built Eigendrum, a web tool that solves the 2D wave equation for arbitrary shapes so you can hear what they sound like as drums. How it works: * Solves -∇²u = λu using finite element analysis (Kφ = λMφ) on a triangle mesh. * Validated to <0.1% error against closed-form solutions for circles (Bessel zeros) and rectangles. * Sound model factors in strike location, Rayleigh damping, and mallet width. * Includes Kac drums I & II to demonstrate identical sound spectra from different geometries. * No frameworks, build steps, or dependencies. Repo and tests:…
Life & fun · 26d ago · baselashraf81.github.io
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OpenTrailPaper is open-source bike computer firmware for the LilyGO T5S3 4.7" E-Paper PRO. It supports offline maps, GPX routes, FIT recording and Bluetooth sensors.
Dev tools · 1d ago · opentrailpaper.com
Run Qwen3.8-Flash-Next (125B MoE, 104 GB at 4-bit) on Macs with a fraction of that RAM by streaming experts from SSD. MLX + Swift, Ollama-compatible API. - carloslfu/slotstream
Dev tools · 4d ago · github.com
NPC-Forge is a framework for building conversational agents that run on the CPU without relying on machine learning or LLMs. - NPC-Forge/docs/development.md at main · gioblu/NPC-Forge
AI · 2d ago · github.com
Weedout is a Safari extension that filters out videos YouTube labels as “Made with AI”.
AI · 4d ago · masteranza.github.io
Find your next hire or your next role from Hacker News monthly threads. AI-powered matching between candidates and job postings.
AI · 4d ago · hnmatchmaker.com
I made OwnTime to balance between competing priorities in my life. The idea is based on two main influences: the concept of "roles" from "The 5 Choices" (2015), and my repeated failure to effectively implement time blocking due to the necessary flexibility in my role. The app allows you to define time budgets, which are not much more than a few mutually exclusive countdown timers. The UX is essentially that of a chess clock for an arbitrary number of players with configurable time. The whole point of the app is to kick you out of the running role/priority when its time is up. One…
Life & fun · 4d ago · owntime.app