Amazon’s most asked interview questions

1) K largest elements from a big file or array.

2) Find a triplet a, b, c such that a2 = b2 + c2. Variations of this problem like find a triplet with sum equal to 0. Find a pair with given sum. All such questions are efficiently solved using hashing. – Practice here

3) Binary tree traversal questions like left view, right view, top view, bottom view, maximum of a level, minimum of a level, children sum property, diameter etc.

4) Convert a Binary tree to DLL – Practice here

5) Lowest Common ancestor in a Binary Search Tree and Binary Tree.

7) Implement a stack with push(), pop() and min() in O(1) time.

8) Reverse a linked list in groups of size k – Practice here

9) Given two numbers represented by two linked lists, write a function that returns sum list – Practice here

10) Rotate a matrix by 90 degree.

11) Stock span problem

12) Next greater element

13) Some Dynamic Programming problems like:

14) Why Amazon?

15) Questions about projects done in previous company or final year.

Also, see

You may also like to see the following Amazon Interview Video.

Please write comments if any common question is missed.

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