Salesforce Software Engineer(Internship) interview questions

Process was smooth. Interviewers were very friendly. I had 4 rounds of interview. 1st 2 rounds were purely technical and I was asked to code solution for problems covering the concepts of tree, linked list, dynamic programming and permutation and combination. Next round, they asked on the projects I did and on a real world problem. After that I had an HR interview.

on campus hiring for intern roles..online round had 3 coding questions. level was medium to hard . Time complexity was an issue. try to solve optimal solutions. I solved 1 completely and 2 partially .. There were partial marks for each questions .