add FAQ

On-behalf-of: @SAP christoph.mewes@sap.com

Author: xrstf

docs/content/faq.md

@@ -1,3 +1,21 @@
 # Frequently Asked Questions
 
-TBD
+## Can I add/update objects to already initialized clusters?
+
+No. Once the initialization is completed (and the initializer removed from the
+`LogicalCluster`), the init-agent has no way to access the newly created cluster
+anymore, so it also cannot reconcile after that point.
+
+Reconciling behaviour is planned for future releases, but the exact approach is
+not yet decided.
+
+## Can `InitTargets` generate random data, like passwords?
+
+Yes! `InitTemplates` can make use of the entire [sprig][sprig] library, which
+includes functions to generate passwords, UUIDs etc.
+
+However, the init-agent has no memory, so if one initialization round fails
+and then agent re-tries, it will re-render all templates and so generate new,
+different random data.
+
+[sprig]: https://masterminds.github.io/sprig/