KeepTruckin Interview Questions

Note: ensure you read the disclaimer on the previous page reading the accuracy and sourcing of these problems.

Single Lonely Number

In a given array of numbers, one element will show up once and the others will each show up twice. Can you find the number that only appears once in O n linear time? Bonus points if you can do it in O 1 space as well. lonelyNumber 4, 4, 6, 1, 3, 1, 3 6 lonelyNumber 3, 3, 9 9...

Difficulty: 3/10

Merge Two Binary Trees

Merging Two Binary Trees The Problem Statement You are presented with two binary trees. Your task is to merge these trees into a single, new binary tree. ! Merging Binary Trees https: storage.googleapis.com algodailyrandomassets curriculum trees merge two binary trees cover image.png ...

Difficulty: 5/10

Is An Anagram

Understanding Anagrams: A Simple Definition An anagram is a fascinating literary device where you can rearrange the letters of a word, phrase, or name to form another meaningful sequence. Think of it as a jigsaw puzzle made of letters. For example, the word "cinema" can be rearranged to form "ice...

Difficulty: 3/10

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

Pick A Sign

We're given an array of positive integers like the following: js 2, 1, 3, 2 Imagine that we're allowed to make each element of the array either a positive or negative number, indicated by a signage either a plus or minus sign that appears before it. If we sum up all the si...

Difficulty: 7/10

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

Traverse in a Zig Zag

Here's a fun one: can you write a method to return the nodes of a binary tree lessons an intro to binary trees and search trees in a zig zag level order? It should return a multi dimensional array of arrays, with each child array being a level of the tree. That's a mouthful, so here's an...

Difficulty: 6/10

Counting Univalued Subtrees

Question Can you count all the univalued subtrees in a binary tree, as shown in the figure below? The Problem We are given a binary tree. The challenge is to count all the univalued subtrees in the tree. Just to recall, a subtree is any node along with its descendants. The root...

Difficulty: 6/10

Generate All String Permutations

Write an algorithm that takes an input string like "abc" , and prints out all possible permutations of the string. A permutation of a group of elements is defined as one of the n! number possible arrangements the elements can take, where n is the number of elements in the range. We'd expect t...

Difficulty: 6/10

Building a RESTful Web Service

Still generating... This lesson is currently still being generated, please wait... thanks! **Please refresh in a minute or two to see updates.** ...

Difficulty: 5/10

How Do Large Language Models Work?

Introduction Large language models LLMs are a type of artificial intelligence AI that are trained on massive amounts of text data. This training allows LLMs to **learn the statistical relationships between words and phrases**. Once trained, LLMs can be used to generate text, translate langu...

Difficulty: 5/10

Concurrency and Multithreading

Introduction to Concurrency and Multithreading Concurrency and multithreading are important concepts in software development. They allow programs to execute multiple tasks simultaneously, improving performance and responsiveness. Concurrency refers to the ability of a program to perform multip...

Difficulty: 5/10

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People at KeepTruckin Say

This information was sourced from reviews originally posted on Glassdoor.

The people i worked with were awesome! There was a sense family ties between my teammates.

Applying to KeepTruckin was one of the best things I did for my career. The company open door policy and rapid growth has allowed me to get heard and grow my career at a faster rate. I cannot stress enough the importance of working for a company with good culture. KeepTruckin has it. It just makes coming to work easy.

Demand for the product is rapidly growing. The work is innovative and exciting. New markets are opening up to us. The future of this company looks very bright.

KeepTruckin is one of the few companies I've talked to that is well run from top to bottom. The engineering team is really solid and is run by engineers. Most of the product requests come from customers and are thoroughly thought out before they're implemented.