Technical Interview:
Phone: Difference between id and class, Explain Threads, Client side vs Server Side rendering
Face-to-Face: Design an LRU (Least Recenty Used) Cache, Given an array [[1,2,3], [4,5,6],[7,8,9], rotate it to obtain the following result [[7,4,1], [8,5,2], [9,6,3]].

Question

Technical Interview:
Phone:  Difference between id and class, Explain Threads, Client side vs Server Side rendering
Face-to-Face: Design an LRU (Least Recenty Used) Cache, Given an array [[1,2,3], [4,5,6],[7,8,9], rotate it  to obtain the following result [[7,4,1], [8,5,2], [9,6,3]].

Anonymous · Accepted Answer

Transpose and then reverse every row, O(N^2) time & O(1) Space.

Anonymous · Answer

When rotating every column becomes the new row, so array[row[column]] becomes a[column[row]] .

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