We set the scope from each certification’s official exam information. For AWS certifications that means the exam domains in the Exam Guide AWS publishes; for Linux Master it means the exam standards of the Korea Association for ICT Promotion (KAIT). We divide those domains into weeks and days to build the curriculum.
The “Based on” line at the top of a note shows which exam’s guidance the note was written against.
Notes and questions are first drafted with AI tools, then reviewed and edited by the operator before they are published. Practice questions and mock exams are made the same way, and we do not copy real exam questions.
In October 2026 we re-checked the notes and questions that were already published. We looked for factual errors, figures written differently within the same exam, and bias where correct answers cluster on one side of the options, and fixed what we found. What we fixed is published in the changelog.
Notes that have been reviewed show the year and month of the “Last reviewed” at the top. Notes with no review record show no date.
If you find something wrong, please tell us through the contact page or at wkdrndydtlr@gmail.com. You can also send a report with the “Report an error” link at the top of a note. We check each report, fix the problem, and record the fix in the changelog.
CertNote is an independent study resource and is not affiliated with, or endorsed by, exam administrators such as Amazon Web Services or the Korea Association for ICT Promotion (KAIT). We do not publish recalled or leaked exam questions; every question included is written in-house.
Exam scope and registration details are changed by the administering organizations from time to time. Please re-check figures such as exam fees, number of questions and passing criteria against the official announcement before you register.