1. Rabbi Zidni Ilma

https://duaforexams.blogspot.com/2019/12/1-rabbi-zidni-ilma.html

                      "O My Lord Increase me in Knowledge"
               
It one of the most effective and powerful dua which can be recited throughout the examination month because it rapidly increases the faith as well as our knowledge and our main aim is to remember all the topics which we have memorized in case it helps the most... 

             This dua is probably every Muslim child’s chant during exam season. It is ayah 114 from Surah Taha. I normally recite this all throughout my exam. It is super short and easy to remember.