HCL Interview Experience | Set 2 (For Experienced)

Round 1: It was a written which consisted of 6 coding questions. It was set up just to see how well you can optimize code. 1: Swap two integers without using temporary variable. 2: Write a function to find  substring in a string. 3: Write recursive function for Fibonacci series. 4:Check whether a given string is palindrome or not. 5: Function to convert decimal into binary. 6: Find if given input is binary or not. Round 2: It was F2F  interview round. Interviewers asked about my role in previous company and asked me question about bitwise operators, complex pointers, recursion, OOP concepts, etc.