I've finished learning all the vocabulary off by heart and I know the verbs ( active + passive ) as well as deponents. Is it neccessary to learn the noun endings ( genitive , dative etc. ) , as well as other grammatical structures such as indirect statements and -ne in order to achieve the A* Grade?
It sounds obvious, but the best way to revise for Latin is to actually TRANSLATE passages as it tests all your skills at once(including how to use grammatical structures) and makes you remember vocabulary more effectively. If you haven't done all the cambridge Latin course books already, I would highly recommend going on the CSCP website as there are a lot of funny stories to translate, vocab to learn and exercises to test your knowledge on Latin grammar.
Also, if you are doing the literature exams as well, the CSCP website has an anthology of the set texts which is SO SO SO useful, especially the audio clips that they have for some of the texts.
Good luck! I hope this helps