I applied through university. The process took 2 days. I interviewed at ALSTOM (Vellore) in Aug 2016
Interview
written test(90 min, 60 aptitude 30 technical)
GD
Interview(technical + HR)
The written test was pretty easy. The technical qestions were mainly based on electronics part.
General Aptitude consists of quants,logical and verbal sections.
Interview questions [1]
Question 1
Which sensor is used to measure jerk?
Which sensor is used to measure speed?
Tell me about yourself
What is your 5 year plan?
What does an instrumentation engineer do at Alstom?