HCLTech Senior Software Engineer interview questions

I Recently took interview with the HCL . They said it was scheduled interview and called at 10:00am .When I reached there was around 100 candidate waiting there . They asked to wait in a room . I had to wait for 5 hour before my turns come. In between they asked we can have lunch at the cafeteria. Food at the Cafeteria was very bad .I was fleeping sleepy after having that food ;): Then met interviewer . He was taking taking interview of 6 candidates at the same time .He gave 4 set of program to every candidate and asked to solve that. These are the list of ques . 1)Find the Merge point of two linked list. 2)Swap two bits of integer. 3)Reverse individual words of the sentence. 4) Reverse sting without using temp string. He didn't asked abt the project exp . Over all it was a bad experinece in taking interview at HCL Bangalore. Sitting idle for 5 hr was horrible.