I applied online. The process took 2 days. I interviewed at BT Group (Gurgaon, Haryana) in Jan 2019
Interview
Three stage interview
First one was written test on english and maths
Second one was speaking to test communication skills
Third one was 1 to 1 interview with department managers who asked technical questions pertaining to role.
I applied online. The process took 1 week. I interviewed at BT Group (Glasgow, Escocia) in Jan 2020
Interview
Clear and simple, no pressure from interviewers. Conversational approach with no questions designed to catch you out. Happy with how they did it. Did not get the job but they were nice and informative.