Cognizant Associate interview questions

The process consist of 2 technical rounds and 1 HR round. Technical round consisted some basics of programming and algorithm questionsalong with some puzzles. The HR round was quite intensive and it extended for about half hour. Though the overall process was not very tough, but you need to know the HR questions well.

The interviewer was there, and asked me question about binary tree, hashing, string manipulation. The binary tree question was like level order traversal in a spiral order. The string one was reversing the string without using extra space.