Esri Interview Question: How can you find the center o... | Glassdoor

Interview Question

Software Applications Authentication Product Engineer Interview Redlands, CA

How can you find the center of a linked list using only a

  single operation to pass through each member?
Answer

Interview Answer

1 Answer

0

My answer was to load the items into an array, but the expected answer is to use two pointers to walk through the list. The first pointer progresses one link at a time while the second progresses two links at a time. Thus, when the second pointer reaches the end, the first pointer is at the midpoint.

Interview Candidate on Nov 1, 2015

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