I have an important exam in which I am responsible for undergraduate level of Calculus, Advanced Calculus, Linear Algebra, Differential Equations, Abstract Algebra and Real Analysis.
Do you know any kind of exams measuring general knowledge on these topics? Thanks,
One of the exams students write for a graduate admissions in North America is the GRE Mathematics Subject Test (although more and more schools are no longer requiring such standardized tests). It covers roughly the topics you mention in a single exam. Here is an official "practice book" for GRE exam with many questions for practice:
https://www.ets.org/content/dam/ets-org/pdfs/gre/practice-book-math.pdf
Additional problem sets can be found here:
https://math.uchicago.edu/~min/GRE/
For example, check out
https://math.uchicago.edu/~min/GRE/files/week1.pdf
to see if the problems are at an appropriate difficulty level for your upcoming exam.