Facebook Interview Question for Java Developers


Country: United States




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Sorted Linked List

- zw118 February 23, 2018 | Flag Reply
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the 2 data structures are a list (for O(n) insertion) & a hash-map that keys the list elements.
insert requires a list traversal bcz hashmap doesnt maintain ordering, so we cannot search an adjacent item.
once we insert the item into the list, we update the hash-map so a lookup will yield the pointer to that object.
delete requires lookup using hash-map (O(1), followed by the removal of entry from hash-map (O(1) & then unlink of object from list (O(1)

- eitanbenamos March 31, 2018 | Flag Reply


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