Two honest numbers
Most study products just say "comprehensive." We would rather show you the math. For every exam, we measure our practice against its official exam guide - the topic list the certification provider publishes, whether that is AWS, Microsoft Azure, Google Cloud, or another - and publish two numbers: Breadth and Depth. Here is exactly what each one means, in plain terms.
Breadth - how much of the exam we cover
Every certification publishes an exam guide that names every topic the exam can test. We take that list and check, topic by topic, whether our practice covers it anywhere at all. Breadth is the share of the exam's topics we touch.
So a Breadth of 99% means that out of every topic in the official guide, we have practice on 99% of them. It answers a simple question: "Will this course leave gaps in what I see?"
Depth - how thoroughly we cover it
Seeing a topic once on a flashcard is not the same as being ready to answer a real question about it. Depth is the stricter number. A topic only counts as "deep" when all three of these are true:
- it appears in at least 3 practice items (not just one), and
- it shows up in at least 2 different formats (for example a flashcard and a quiz), and
- at least one of those is an application format - a real scenario question or an ordering drill, not only a flashcard.
So Depth answers a harder question: "How many topics will I actually practice applying, not just recognize?" It is always lower than Breadth, and that gap is the honest part - it shows where a topic is covered lightly rather than drilled.
Why we show both
A course can have high Breadth but low Depth - lots of flashcards, very few real questions. Breadth tells you how much of the exam we cover; Depth tells you how well. Showing both is the only way to give you a number you can trust instead of a marketing word.
How it is calculated and kept current
The topic list comes straight from the certification's own published exam guide - we do not invent it. The calculation is a plain, repeatable count (no guesswork and no AI scoring), so the same content always produces the same numbers. We recompute both numbers automatically every time we add content or the exam guide changes, and we date-stamp the result ("as of ...") on each exam page. Certification providers revise their exams over time, so that date tells you how fresh the numbers are.
What these numbers do not mean
Breadth and Depth measure how much of the syllabus this course practices - they are not a promise that you will pass. Passing depends on you. And the method is deliberately conservative: some exam-guide wording is too abstract to match a specific practice item, so if anything, the real coverage is a little higher than we report. We would rather under-promise.