HCL is one of the leading software company in India and all over the world.The interview process is easier than other companies.Their placement papers resembles with HP and Wipro.Their questions are asked from C, networking concepts. Aptitude preparations can be done by refering some books, previous question papers, and also some websites provide sample HCL placement paper and also Online aptitude test.They are very helpfull for interview preparations and so that you can face the interview confidently.