Hello Priya

You can download question papers of almost every course and every entrance exams online. But for me to be able to help you more you need to tell me what course, what level and which question papers you are interested in.

Reply to this message, I will provide you with the appropriate information.

And if you are asking where can you find already downloaded papers, you should check the 'download' folder in your mobile/laptop 

Hope this was helpful.