Red Hat 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

Max Per Level

Given a binary tree, write a method to return an array containing the largest by value node values at each level. In other words, we're looking for the max per level . So for instance, given the following binary tree, we'd get 2, 7, 9 if the method grabbed the correct maxes. js ...

Difficulty: 4/10

Stock Buy and Sell Optimization

This is a classic technical interview question that I've seen a number of times in real life interviews. Let's say you're given an array of stock prices, with each element being an integer that represents a price in dollars. 10, 7, 6, 2, 9, 4 Each index of the array represents a s...

Difficulty: 5/10

Implement a Graph

Since a graph lessons simple reference to graphs is one of the more difficult data structures to conceptualize in a programmatic 2D manner, let's go ahead and implement it! We'll go with an adjacency list version. Note that there's also the adjacency matrix method which we will cover later....

Difficulty: 4/10

Invert a Binary Tree

Can you invert a binary tree over its vertical axis? This is a famous problem made popular by this tweet: Google: 90 of our engineers use the software you wrote Homebrew , but you can t invert a binary tree on a whiteboard so f**k off. mdash Max Howell mxcl June 10, 2015 Given a binary t...

Difficulty: 7/10

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

Maximum Sum of Absolute Difference of Values and Indices

The Puzzle in Simple Terms You have a list of numbers called A . Your task is to pick two numbers from this list, let's call them A i and A j . Additionally, you will take note of their positions, i and j , in the list. You are to find the biggest result you can get from a specific formu...

Difficulty: 7/10

Product Except Self

If we are given an array of integers, can you return an output array such that each corresponding input's elements returns the product of the input array except itself? This can be hard to explain, so let's take an array: 1, 2, 4, 16 What we want to return is 128, 64, 32, 8 . This is...

Difficulty: 4/10

The Two Coloring Graph Problem

Question Given a graph, can you use two colors to color each node of the graph, such that no two adjacent nodes have the same color? The Problem The graph coloring problem is a well known problem in computer science. It requires coloring different nodes of the graph so that two adj...

Difficulty: 6/10

Best Cloud Platforms for Software Development

Avoiding digital transformation is not an option in the modern world, and it goes especially for the businesses trying to follow all the new digital trends. Cloud computing is crucial for any of those businesses, and it has become much more significant in the past few years. Using such cloud techn...

Difficulty: 5/10

Advanced CRDT Topics

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Difficulty: 5/10

Synthesis and Application

**Unlock Your Full Potential with AlgoDaily!** We hope you're enjoying this course. At AlgoDaily, our aim is to transform complex coding challenges into engaging, bite sized lessons. And while our free lessons give you a glimpse of this transformative experience, there's so much more in store. ...

Difficulty: 5/10

Interview Reports

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People at Red Hat Say

This information was sourced from reviews originally posted on Glassdoor.

Good benefits, great company, but most of all fantastic coworkers. Now a part of IBM, but still fiercely independent. The feeling that comes with working for free software.

Excellent open culture, great to work on open source software. Has looked after its employees through the pandemic.

Wonderful workplace with great work life balance! Fun projects and transparent working nature encouraged throughout the company.

Culture, pay and workplace amenities are great. They are committed to the growth of their associates, and the company has a benevolent presence in its community.