Microsoft Summer Intern interview questions

Campus Interview: A couple simple coding questions and a design question. On of the coding questions was Determine if there are duplicate characters in a string and analyze the run time of your code. The other one was just a simple for loop.

It was conducted online on Microsoft Teams. The interviewer was friendly and gave enough time for the questions asked. Questions on array, linked list and DBMS were asked. Had to write my code in the chat section of Microsoft Teams