I have some topics those are.
1.american the melting point,
2.your role model
4.america the super power
5.election in u.s
8.euro vs doller
9.new york city
in this you have to speek for one minute. you have a lot from this you have to
select your topics.
Aptitude are dead easy
Technical also very easy
Only thing is you have good communication skill.
1.how a thread is created
some are part of OSI layer questions
3)some r easy c questions like a switch case without break statement etc.
4) semaphore is used for
1) which is fastest sorting algorithm
2)heaps are from of --->priority queue
which data structure is used to rescue empty space is ---circular queue