Mozilla Interview Questions

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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

Grab a Random Node

Given a linked list, can you write a method to get a random node within it? Let's assume you're given a random node generator. The linked list will have at least 2 nodes, and may look something like this: 1 2 3 4 The odds of getting any number between 1 and 4 inclusive should b...

Difficulty: 4/10

Find Missing Number in Array

We're given an array of continuous numbers that should increment sequentially by 1 , which just means that we expect a sequence like: 1, 2, 3, 4, 5, 6, 7 However, we notice that there are some missing numbers in the sequence. 1, 2, 4, 5, 7 Can you write a method missingNumb...

Difficulty: 4/10

Find Shortest Palindrome Possible

We have a string str like the following: js const str "bubble" Find a way to convert it to a palindrome by inserting characters in front of it. Recall that a palindrome is defined as "a word, phrase, or sequence that reads the same backward as forward". What's the shortes...

Difficulty: 5/10

String From Binary Tree

Suppose we're given a simple binary tree lessons an intro to binary trees and search trees like the following: js 1 2 3 4 Can you **generate a string** based off the values of its nodes? With this string, we're going to want to capture ...

Difficulty: 5/10

Find the Intersection of Two Linked Lists

Assume you have a Linked List implementation that has the following API: js prepend to start of list prepend val appends to end of list append val get an array of node values for testing toArray Can you write a method getIntersection list1, list2 to find the interse...

Difficulty: 4/10

K Largest Elements From List

We're given a list or array of numbers, like the following: const nums 5, 16, 7, 9, 1, 4, 3, 11, 2 Can you write an algorithm to find the k largest values in a list of n elements? If k were 3 , we'd want the three largest numbers returned. The correct logic would return 16, 11, 9 ....

Difficulty: 5/10

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

Detect An Undirected Graph Cycle

Can you detect a cycle in an undirected graph? Recall that an undirected graph lessons simple reference to graphs is one where the edges are bidirectional. A cycle is one where there is a closed path, that is, the first and last graph lessons simple reference to graphs vertices can be the...

Difficulty: 9/10

[Language Case Study] WebAssembly Whitepaper Summary and Architecture

_This is a summary of the original WebAssembly whitepaper, which can be found at this link https: people.mpi sws.org rossberg papers Haas, 20Rossberg, 20Schuff, 20Titzer, 20Gohman, 20Wagner, 20Zakai, 20Bastien, 20Holman 20 20Bringing 20the 20Web 20up 20to 20Speed 20with 20WebAssembly.pdf _. ...

Difficulty: 5/10

Multithreading in Operating Systems with Modern Programming

In this lesson, we'll learn about multithreading, with a focus on the following key points, 1. What is multithreading, and why do we use it? 2. Overview of the importance of multithreading in modern programming applications. Have you ever found yourself in a situation when you had to perform...

Difficulty: 5/10

Introduction to Redux

Introduction to Redux Redux is a state management library that works well with JavaScript applications, including React. It provides a predictable state container and helps manage the state of an application in a centralized manner. The core concept of Redux involves three main components: the...

Difficulty: 5/10

Interview Reports

What kind of questions should I expect in Mozilla's online coding interview...

Mozilla Interview Questions | Glassdoor...

Mozilla interview details: 198 interview questions and 183 interview reviews posted anonymously by Mozilla interview candidates.

Mozilla Software Engineer Interview : cscareerquestions...

More specifically, Firefox Desktop Engineer. I've not been able to find very much about their interview questions. Glassdoor doesn't have very much …

THIS IS MY FIRST DAY AT MOZILLA...

Senior Network Engineer

I’m now a Senior Network Engineer at Mozilla. Today is my first day as an employee. Here’s my summary of how I got here and how the process has been so far, from my perspective.

I started learning JavaScript 10 months ago and the journey has been full of frustration, hope, and motivation. Before starting JavaScript, I thought I knew most of it — but I was wrong. There was a…

How I got a remote, paid internship with Mozilla through Outreachy...

Internship

I started learning JavaScript 10 months ago and the journey has been full of frustration, hope, and motivation. Before starting JavaScript, I thought I knew most of it — but I was wrong. There was a…

People at Mozilla Say

This information was sourced from reviews originally posted on Glassdoor.

I adored my coworkers, almost without exception. There were a lot of passionate, motivated, interesting people there.

Mozilla hires exceptionally talented people. The company is also incredibly accommodating of engineers, with a lighthearted and informal working style that naturally fosters meaningful relationships. Employees are kind and supportive of one another. Many hold deep values that go way beyond their paychecks.

Excellent culture, very respectful, aims at diversity, inclusion. Excellent benefits. Most "at home" I've ever felt working for a company. People here were awesome. I truly enjoyed working with 99. 9% of them.

Mission-driven approach to software development was a refreshing change from the quarterly grind of working for large, public companies. There is a genuine desire to make the world a better place, and most everyone in invested in that.