# 254

Aws Engineer interview questions shared by candidates

## Top Interview Questions

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DevOps Data Engineer (AWS) was asked...25 March 2017

Yes

Yea

Yes

### Hardest Q was: Here's a binary tree: find the longest path within it. So, find a path between any two leaf nodes, where the path is the longest.

class Solution{ int ans[] = new int; //O(n) public int efficientDia(TreeNode root) { if(root == null) return 0; int left = efficientDia(root.left); int right = efficientDia(root.right); ans = Math.max(ans, 1 + left+ right); return 1+ Math.max(left, right); } //O(n^2) public int getDiameter(TreeNode root) { if(root == null) return 0; int leftHeight = getHeight(root.left); int rightHeight = getHeight(root.right); if(ans &lt; 1 + leftHeight + rightHeight) { ans = 1 + leftHeight + rightHeight; } return Math.max(getDiameter(root.left), getDiameter(root.right)); } Less

int ans[] = new int; //O(n) public int efficientDia(TreeNode root) { if(root == null) return 0; int left = efficientDia(root.left); int right = efficientDia(root.right); ans = Math.max(ans, 1 + left+ right); return 1+ Math.max(left, right); } //O(n^2) public int getDiameter(TreeNode root) { if(root == null) return 0; int leftHeight = getHeight(root.left); int rightHeight = getHeight(root.right); if(ans &lt; 1 + leftHeight + rightHeight) { ans = 1 + leftHeight + rightHeight; } return Math.max(getDiameter(root.left), getDiameter(root.right)); } private int getHeight(TreeNode root) { // TODO Auto-generated method stub if(root == null) return 0; return Math.max(getHeight(root.left), getHeight(root.right))+1; } Less

Indians at all companies always ask tree questions, it makes them giggle inside. I know, because I'm half indian and have interviewed people... tee hee hee Less

### What happens when you delete the Sysvol folder?

Never delete the Sysvol File since it a critical file that regulate replication among domain controllers. It also manage File Replication Service to share files and Scripts as well as Group Policy to get applied in the domain. Once deleted please refer to your next backup DC to restore your PDC or the deleted DC's Sysvol. Less

### how do you build your stack from cloudformtion

how do you orchestrate using kubenetes

### come avresti disegnato il seguente DB data le richieste dell'esercizio a casa?

DB relazionale con PKs e foreign key etc.

### Code the FizzBuzz algorithm

Created an algorithm using if/else statements for returning either "fizz", "buzz" or "fizzbuzz". Less

### Syntax of Linux and all

And profit loss questions , speed distance time questions

### Find the longest palindrome in a string

So there were 5 interviews in total? Did you have a lunch interview?