Elastic Interview Questions

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Find Duplicate Words

A very common interview challenge is to determine how often words appear in a given string or set of strings. Here's a version of this: return a list of duplicate words in a sentence. For example, given 'The dog is the best' , returns "the" . Likewise, given 'Happy thanksgiving, I am s...

Difficulty: 4/10

Validate a BST

Given a binary search tree like the one below, can you write a function that will return true if it is valid? 5 3 9 1 4 Recall that a BST is valid only given the following conditions: The left child subtree of a node contains only nodes with v...

Difficulty: 4/10

Binary Tree Inorder Traversal

Can you write a function to traverse a binary tree **in order**, and print out the value of each node as it passes? 4 5 6 The example would output 4, 6, 5 since there is no left child for 4 , and 6 is visited in order before 5 . The definition of a tree node i...

Difficulty: 3/10

Mean Per Level

We are given a binary tree lessons an intro to binary trees and search trees and are tasked with writing a method that determines the average of every level in the tree. So for instance, given the following binary tree, we'd get 2, 5, 7 if the method grabbed the correct means. js ...

Difficulty: 4/10

Trapping Rain Water

The Trapping Rain Water Challenge: A Deep Dive Imagine you're looking at an elevation map displaying rainfall over a region's landscape. The map consists of bars of varying heights, each representing different elevations. Can you determine the amount of rainwater that this uneven terrain can hold?...

Difficulty: 8/10

Classical N-Queen Problem

N Queen Problem: The Chessboard Conundrum Imagine stepping into an interview room, and the interviewer asks you to solve the N Queen problem. It's a modern take on the classic 8 Queen Puzzle https: en.wikipedia.org wiki Eight_queens_puzzle , where you place queens on a chessboard in such a way ...

Difficulty: 4/10

Flood Fill Paintbucket

Imagine the implementation for the paintbucket feature in Microsoft Paint, or how certain image filters work. You click on a specific pixel on a screen, and every similar colored neighboring pixel would change to your selected color. Let's implement a simpler version of that feature. You're gi...

Difficulty: 7/10

Detect Loop in Linked List

What is the best way to find out if a linked list contains a loop? You're given the following data structure as the definition of a linked list node: js class LinkedListNode constructor val this.val val this.next null A loop or a cycle in graph less...

Difficulty: 7/10

Swap Every Two Nodes in a Linked List

Write a recursive algorithm that swaps every two nodes in a linked list. This is often called a pairwise swap. For example: js * original list 1 2 3 4 after swapping every 2 nodes 2 1 4 3 * You may assume that the definition of a linked list node is: ...

Difficulty: 4/10

Introduction to Amazon Elastic Beanstalk

AWS Elastic Beanstalk Easy App Deployment on AWS **AWS Elastic Beanstalk** is a fully managed service by Amazon Web Services AWS that makes it easy to deploy, scale, and manage applications in the cloud. Some key highlights of Elastic Beanstalk: Streamlined Deployment Provides automat...

Difficulty: 5/10

Elastic Load Balancer (Netflix)

In this article, we will talk about Elastic Load Balancer, its different types, and how it contributes to the architecture of Netflix. Netflix uses Amazon's elastic load balancing service to router the traffic to different front end services. ELBs are set up in such a way that the load i...

Difficulty: 5/10

Introduction to Amazon Elastic Load Balancer

AWS ELB Elastic Load Balancer **Elastic load balancing ELB ** is used to distribute application traffic over many target points such as AWS EC2 instances, buckets, IP addresses, Lambda operations, and virtual machines. In one Availability Area, or throughout many Availability Areas, ELB can ...

Difficulty: 5/10

Interview Reports

Elastic Interview Questions | Glassdoor...

Elastic interview details: 272 interview questions and 221 interview reviews posted anonymously by Elastic interview candidates.

Elastic Interviews | Comparably...

6 Elastic employees rate their interview experience an A+ or 93/100. 100% believe the overall process was positive.

Tips for interviewing at Elastic | Elastic Blog...

People at Elastic Say

This information was sourced from reviews originally posted on Glassdoor.

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I absolutely love working at Elastic. My recruiting and interview process was the best-organized and, frankly, most delightful experience I've had in my twenty-five year career. (Thanks, Anne!)