The selection process is as follows
Aptitude Test: 100 questions - 25 minutes. No negative marks.
All simple questions but the condition is you have to answer all within time. So try to answer all questions.
Technical Test: 70 questions - 40 minutes
Areas covered are networks, OS, RDBMS(more questions), C Apps(5 questons), Some electronics based questions.
It is not like usual GD. All are to speak for 1 minute about the given topic.
They select for Technical interview (mostly 45 min) and then HR interview (45 min).
Its easy to get selected in Cadence if you handle the situation neatly. Mostly they also look for rank toppers in degree.