Ebay Interview Question for Software Engineer / Developers


Country: United States
Interview Type: Phone Interview




Comment hidden because of low score. Click to expand.
5
of 5 vote

They are both implementations of the List interface. LinkedList implements it with doubly linked list, ArrayList implements it with dynamically resized array.
For LinkedList: {{
get is O(n),
add is O(1),
remove is O(n),
iterator.remove is O(1).}}
For the ArrayList: {{
get is O(1),
add is O(1) amortized, i.e. once in a while when array must be resized you pay
performance, so in worst case it is O(n),
remove is O(n).
}}

- michael.sapozhnikov March 06, 2012 | Flag Reply
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0
of 0 votes

I think that 'add' in case of ArrayList is always O(n) because the array contents need to be shifted by one for every addition (except when the addition happens at the end, in which case the ArrayList may need to expand.)

- rajarshi129 October 09, 2012 | Flag
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