I am going to do my PhD soon in Computer Science but I don't knwow which topic should I do my PhD in. How can I find my interest and how can I assure that if I write a proposal it will be accepted?
but I don't know which topic should I do my PhD in. How can I find my interest
and how can I assure that if I write a proposal it will be accepted?
:$

If you know a bit about the area you should have an idea of your research interests. Approach a supervisor/s with the same interests and put a few ideas to them and find out whether or not they would be receptive to having a PhD student.