Ebay Interview Question for Software Engineer / Developers

Country: United States
Interview Type: Phone Interview

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

Add a Comment

Writing Code? Surround your code with {{{ and }}} to preserve whitespace.


is a comprehensive book on getting a job at a top tech company, while focuses on dev interviews and does this for PMs.

Learn More


CareerCup's interview videos give you a real-life look at technical interviews. In these unscripted videos, watch how other candidates handle tough questions and how the interviewer thinks about their performance.

Learn More

Resume Review

Most engineers make critical mistakes on their resumes -- we can fix your resume with our custom resume review service. And, we use fellow engineers as our resume reviewers, so you can be sure that we "get" what you're saying.

Learn More

Mock Interviews

Our Mock Interviews will be conducted "in character" just like a real interview, and can focus on whatever topics you want. All our interviewers have worked for Microsoft, Google or Amazon, you know you'll get a true-to-life experience.

Learn More