Synechron Senior Java Developer interview questions

It took 30 minutes for 1st round, Interviewer asked coding question and went away made a silly mistake run for the give input but miss out some edge cases. Question: find long continuous string with all distinct characters.

Was not that difficult. Interviewer kept asking questions that were bookish. Not practical or experience related questions. He asked questions for 10 minutes, although the interview was scheduled for 30 mins. He stopped interview midway as I wasn't able to give bookish answers.