Apart from working papers, audit strategy and plan, and engagement letters, is it necessary to know what documents are required for particular areas of the audit? For e.g. documentation for misstatements / documentation for usage of work performed by internal audit function. Have you seen an exam question in the past asking for such?
No. It is only ever been working papers and planning documents. No more specialist internal audit documents are needed. (Though you could be asked produce a management letter showing internal control weakness, effect, how to fix the weakness).