They will simply ask from your cv and give you a topic to write an essay on it you will provided with laptop and 2 screen on it one will be word and other will be google so first you have to search what you will write on essay than you will have to write essay on your own words please do not copy anything from google it must be your own language and mostly your essay will check on uk software which i dont know but it calculate the accuracy of your english and how much you have copied please do not copy any thing from google write with your own language.
