Android Developer Intern applicants have rated the interview process at ATG with 3 out of 5 (where 5 is the highest level of difficulty) and assessed their interview experience as 100% positive. To compare, the company-average is 90.9% positive. This is according to Glassdoor user ratings.
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They ask for 3 rounds, all were technical and dependent to each task. Each task's deadline is around 1-2 days. The tasks were not that difficult to achieve, I think it would be great if they can provide a bit tough task.