I had to give a written exam first where they ask me about aptitude and reasoning and after clearing that they mailed me for the interview.After clearing that I got an offer letter

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.