CBA question bank coverage by exam domain
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The GoldenKube CBA bank tracks the official Backstage exam weights closely: Customizing Backstage is the largest domain in both, and the other three sit near their weights. Every question has a written explanation. The table below shows the live question counts per domain and the gap to each published weight.
| Official domain | Weight | Questions | Share | Gap (pts) | Explained | Topic pages |
|---|---|---|---|---|---|---|
| Backstage Development Workflow | 24% | 33 | 26% | +2.2 | 33 | 1 |
| Backstage Infrastructure | 22% | 27 | 21% | −0.6 | 27 | 1 |
| Backstage Catalog | 22% | 24 | 19% | −3.0 | 24 | 1 |
| Customizing Backstage | 32% | 42 | 33% | +1.3 | 42 | 1 |
| Whole bank | 100% | 126 | 100% | — | 126 | 4 |
Counts read from the live CBA bank. Weights as published on the official certification page, checked .
What the table measures
Each row is one official CBA exam domain, in the order and with the weight the Linux Foundation publishes. The question count is read from the GoldenKube CBA bank when the page is served, so it always matches what you can practise today. Share is that count divided by the whole bank, and the gap column is the share minus the official weight, in percentage points: a positive gap means the bank has more questions on that domain than the exam weight alone would suggest, a negative gap means fewer. Explained counts the questions that come with a written explanation, and topic pages counts the public topic pages built from that domain.
Some bank sets use their own domain names; those are mapped to the official domain they cover. Mixed practice sets that span several domains are not forced into one row and are listed separately, which is why the official rows can add up to less than the whole bank.
The weights describe the exam, not this bank. A gap is not an error in the exam or in your preparation, it only tells you where practising here gives you more or less material than the exam is likely to ask about.
Where the CBA bank leans
No CBA domain clears the gap threshold. Customizing Backstage, the heaviest exam domain, is also the largest part of the bank, and Backstage Development Workflow is slightly over its weight. Backstage Catalog sits a little under, without crossing the threshold, and Backstage Infrastructure is close to its weight. For a learner this means the bank order is a reasonable proxy for the exam mix, and the domain you see most often is the one the exam asks about most.
How to use this when you practise CBA
Since the bank is balanced, let the scheduler drive. Pair the Customizing Backstage questions with real work in a scaffolded Backstage app: add a plugin, change the theme and wire a software template, because the exam expects you to know where those changes live. Backstage Catalog is slightly thin, so read the catalog descriptor format and entity kinds in the Backstage documentation alongside the questions.
Sources
Independent community project, not affiliated with or endorsed by CNCF or The Linux Foundation.