AppDirect Interview Questions

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

Contiguous Subarray Sum

Given an array of numbers, return true if there is a subarray that sums up to a certain number n . A subarray is a contiguous subset of the array. For example the subarray of 1,2,3,4,5 is 1,2,3 or 3,4,5 or 2,3,4 etc. js const arr 1, 2, 3 , sum 5 subarraySum arr, sum...

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

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

Implement a Binary Search Tree

Let's implement a Binary Search Tree ! Recall that a binary search tree , or a BST , is a binary tree lessons an intro to binary trees and search trees that is ordered via these two properties: 1. The left sub tree of a node has a value less than or equal to its parent node's value. 2. The ...

Difficulty: 6/10

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

Linked List to Binary Search Tree

We're given a sorted singly linked list that is, a linked list made of nodes with no pointers to the previous node where the elements are already arranged in ascending order. js 9 2 3 5 9 Linked List Node Definition: function Node val this.val val this...

Difficulty: 7/10

Shortest Path Distance in Matrix

You are given a 2D matrix with several characters contained in its cells. You will also have two distinct characters which are guaranteed to be in the given matrix. Your job will be to find the minimum manhattan distance lessons what is the manhattan distance between the two characters in the mat...

Difficulty: 8/10

Targets and Vicinities

You're playing a game with a friend called **Target and Vicinity**. *Target and Vicinity* consists of one person thinking up a number in their head, and the other guessing that number. Sounds simple enough the caveat is that we also want to credit close guesses. To estimate the proximity of the ...

Difficulty: 6/10

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

Preparation for Advanced Learning

**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

Arrays and Objects

Arrays are an essential part of programming, especially in JavaScript. They allow us to store and manipulate collections of data. Imagine you are a basketball coach and you want to keep track of your team's players. You can use an array to store their names. Here's an example array of basketball pl...

Difficulty: 5/10

Introduction to Redis

Introduction to Redis Redis is an in memory data store with sub millisecond latency and support for various data types. It is commonly used as a cache, message broker, and database. Redis is designed to be fast, scalable, and highly available, making it an ideal choice for applications that req...

Difficulty: 5/10

Interview Reports

AppDirect Interview Questions | Glassdoor...

AppDirect interview details: 111 interview questions and 91 interview reviews posted anonymously by AppDirect interview candidates.

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People at AppDirect Say

This information was sourced from reviews originally posted on Glassdoor.

Lots of changes/hiring although in engineering most new hires were for the Montreal office.

Working with top technology stack and you get to actually code and make meaningful contributions.

The company offers stock options and bonuses are often funded. Good benefits and paid time off that increases with tenure.

Calgary office is very laid back and people are nice. Many of the developers are kinda quiet, so if you like a laid back quiet environment this is good. Immediate calgary management is great.