Write a function to determine if a Binary tree is a BST.
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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
Ex: Tell me about a challenging project you had, how did you overcome it, what steps did you take, what was the outcome, and what would you do differently next time?
Next greater element ii, tell me a situation you dealt with a challenge
What was the initial scope?
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?
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