Tesco Bengaluru Senior Software Engineer -Testing interview questions

I was referred by my friend who was working with Tesco. 4 rounds of interview. 1st round was telephonic. 2nd and 3rd round was F2F. 4th round again a telephonic by senior manager. There we few questions on coding like to find the reverse of a srting without using inbuilt functions. Sorting of numbers in an Array. Logic to get a random number generated btw 1-6. and other basic testing questions.