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ExamCaliber is a free practice-exam platform for software testing certifications.

It currently covers six certifications — ISTQB Foundation Level (CTFL v4.0), ISTQB Certified Tester AI Testing (CT-AI), ISTQB Advanced Level Agile Tester (CTAL-AT v2.0), ISTQB Performance Testing (CT-PT), ISTQB Security Test Engineer (CT-STE) and the A4Q Selenium Tester Foundation exam — across 35 full-length mock exams and more than 1,300 practice questions.

What makes it different:

• Official exam format. Each mock mirrors the real thing: the published question count, time limit and pass mark, and — where the certifying body publishes one — the official distribution of questions across syllabus chapters. Where no official breakdown exists, ExamCaliber says so instead of inventing one.

• An explanation on every option. Not just on the correct answer. Each distractor comes with a rationale explaining the misconception behind it, which is where most of the learning happens.

• Original questions. No brain dumps, no recalled exam content. Questions are written from the published syllabi.

• Chapter-level results. After a mock you see your score per syllabus chapter, so you know what to reread rather than just whether you passed.

• Free and open. Every mock exam, every explanation and the full chapter breakdown are free, with no account required to take an exam.

• Study guides and FAQs per certification, plus a blog covering exam changes, syllabus updates and certification retirements.

Core content in English; the CTFL, CT-AI and Selenium tracks are also available in German and Spanish.

ExamCaliber is an independent resource and is not affiliated with, endorsed by or associated with ISTQB, A4Q or any member board.