First level will be aptitude and the next level would be HR + technical where you'll be tested on both technically and mentally. Make sure you clear them to get into Infy, it will be worth it.

Asked about Data structures concepts like lists, Arrays, Stac, Que, trees, graphs, hash tables, loops concepts like if, if else, else if ladder, switch, while, function, recursion and asked me to write the code to find the sum of the digits of an array.