Hey sejal ! B. Com honours entrance exam is entry level exam which determines candidate's suitability to undertake course . You need to have good understanding of basic concepts  and its applications. I would tell who to prepare for the entrance . I think you have already aware of your syllabus?? . In case if you not than I will mention it below .

Syllabus For Entrance Exam For B. Com

• Accountancy 
• Maths
• Business studies 
• Basic computer questioning 
• Verbal reasoning and logical reasoning 
• Current affairs 

How to prepare for the entrance exam 

• First don't waste your time in covering  syllabus only covers important chapters and topic that contains maximum marks
• Don't go behind those topics which you are really unaware of. 
• Make a proper timming for your studies and  promise yourself to never procrastinate otherwise you will never complete your syllabus on time and even left those topics which you know really well. 
• Now after execution of study plan,its time to follow up 
• You can start for those chapters which contains high marks and little tough for you if you have enough time ,other wise go for easy chapters 
• Make your own notes even if you have taken coaching classes .
• Try to cover your syllabus early so that you get enough time for your practice 
•  You have to practice more than you took time in understanding those topics.
• Solve at least 4-5 model test papers which is easily available in any store. 
• Must make strong command in Accounts and business maths because these subjects will help you to score high. 
• Try to solve problems in less time with less solution because you will have not descriptive type exam.
• Solve question smartly which will come after conscious effort .
• Whenever you are solving model test papers first you need to read question carefully and then answer in OMR sheet 
• And last thing is that keep revising and practicing because this is the main thing that will help you to clear your exams. 

My all best wishes to you!!