The content of any professional exam is the same, so it depends on your knowledge in these four aspects.
Among them, mathematics will be relatively simple for students majoring in mathematics, and mathematics is a very key subject in the postgraduate entrance examination, so this is an advantage.
Specialized courses will be the weakness of mathematics major. Specialized courses generally involve data structure, operating system, computer composition principle, computer network, different schools and different directions. The content of the exam is different, depending on the content of the exam formulated by the school you want to apply for, and this is your weakness. Because the basic computer knowledge of mathematics major is still relatively weak, you should spend more time learning computer professional knowledge.
Therefore, whether the test is good or not is relative, and a general conclusion cannot be drawn through the division of majors. I can only tell you that the exam items are the same. Only by giving full play to the advantages and making up for the disadvantages can we achieve good results.