UST Senior Java Developer interview questions

First sent an email to open exam link, after that there is a programming test, gave three programming questions to answer, We have to satisfy all testcases. Then 45 minutes timer will run, In 45 minutes we have to complete the test, based on the results they will callback for second round.

I was easy as compared to other and they asked like Given a string, find the 2nd non-repeating character in the string. Also, throw light upon the time and space complexity of it. Name all sorting algorithms and explain along with their procedures and time complexities. Another coding question related to Dijkstra’s Algorithm.