LogicHub interview questions

3 round of interviews 2 coding rounds: DP questions asked in both rounds something about your last employer's work and projects you have done. In my case: I told them bruteforce solutions and then DP approaches and pseudo codes (1 question full code implemented). 1 low level system design round: LRU design with O(1) complexity on both(storing and getting)

1st round a)-find which triangle on basis of side? b)-Describe the Synchronized class . 2nd Round a)-Optimal solution to search an element from 3*3 Matrix which is in increasing order -I explained it very well and even coded the function but he didn't get it . b)-what happens when we enter any URL on the browser? i try to explain DNS everything but don't know what he wanted.