Dell Technologies interview questions

the interview was easy and lasted for 30 mins basics of object oriented concepts , python, data structures and database management queries were asked Give me the code of in-order recursive and non-recursive. A lot of questions were asked on sorting for eg. Best algorithm on the basis of number of swaps, number of comparisons etc. How would you sort words in a large file? Explain the T9 Dictionary. What is the Insertion Sort Code?. Give us a few details on the various projects that you undertook during your course. followed by HR round