Write a function to determine if a Binary tree is a BST.
Engineer Internship Interview Questions
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Mid Stack - Implement a stack which can be popped from the middle
Two coding questions regarding algorithms and data structures
Did you take an Amazon certification course
Next greater element ii, tell me a situation you dealt with a challenge
When was the last time you faced a difficult customer? How did you deal with the customer demands?
Find if a string is a permutation of another string?
How would you detect a phone number (formatted "(xxx)-xxx-xxxx" )in a file that is consist of strings?
Basic java questions and write a method to test whether a given binary search tree is valid or not
Print a binary tree level by level
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