I applied through other source. I interviewed at Qolsys (Hyderābād) in Nov 2014
Interview
First round written test on C and Reasoning, aptitude.
Second round On Linux Os , C programming .
Third Round on Data structures and Bit about Embedded systems
HR Round simple project details.
Interview questions [1]
Question 1
Implementing standard c functions.
Linked list programs and os concepts
Data structures and Bit about Embedded systems