How to select a PhD topic in Computer Science?

Selecting a PhD topic in Computer Science can be confusing but it is important to know where your interest lies. Choose a research area which fits with your interest. Some examples include AI and Machine Learning, Computer Vision and Robotics, NLP, Cloud and Distributed Computing. Survey the current research trends by reading journals like IEEE, Springer, Elsevier. It is also important to follow conferences like ICML, STOC, SIGOMM to get an idea. Check if your selected topic has enough resources and consult your supervisor regarding the same.