The external exams at AKTU are more like CBSE exams as they don’t put much effort in changing the pattern of the paper. The purpose of university exams is to check your knowledge in a particular subject and not compete. So they don’t give out of syllabus questions.
You don’t have to refer to high-tech competitive books. The best books for these exams are:
Engineering Mathematics by N.P. Bali
Introduction to Engineering Mathematics by H.K. Das
Previous year papers
Quantum Publication
This study material is enough to get you well through the AKTU exams.