Benchling Interview Questions

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

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

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

Implement a Hash Map

Arrays are amazing for looking up elements at specific indices as all elements in memory are contiguous, allowing for O 1 or constant time lookups. But often we don't, or can't, perform lookups via indices. Hash maps and hash tables are a way around this, enabling us to lookup via keys instead. ...

Difficulty: 3/10

Longest Increasing Subsequence

The Longest Increasing Subsequence LIS is a subsequence within an array of numbers with an increasing order. The numbers within the subsequence have to be unique and in an ascending manner. It's important to note that the items of the sequence do not have to be in consecutive locations within the...

Difficulty: 8/10

Delete Node From End

Removing the Nth Node From a Linked List's End: A Single Pass Approach Get ready to sail through a classic problem: Removing the n th node from the end of a linked list in a single pass. By the end of this lesson, you'll be able to wave goodbye to that pesky n th node and still maintain the lis...

Difficulty: 6/10

Length of String Compression

Let's define the "compacting" of a string as taking an input like the following: 'sstttrrrr' . We want to take the number of sequential appearances number of times it shows up in a row of each letter: s: 2 t: 3 r: 4 And denote them next to the original character in the string,...

Difficulty: 6/10

Dutch National Flag Problem

This problem is named the "Dutch national flag problem" because the flag of the Netherlands is comprised of the colors red, white, and blue in separate parts. Although we won't be using colors, the premise of the challenge is to develop a sorting algorithm that performs some form of separations of th...

Difficulty: 8/10

Closures and Dependency Injection

In JavaScript, closures and dependency injection are powerful concepts that enable modular, maintainable, and flexible code. In this challenge, you will explore these concepts by implementing a specific functionality using closures and then using closures for dependency injection. **Part 1: C...

Difficulty: 6/10

Treats Distribution

Say we are given an integer array of an even length, where different numbers in the array represent certain kinds of snacks or treats. Each number maps to, or represents, one kind of snack. So the following array would have two kinds: snack type 3 and type 2 : js const snacks 3, 3, 2, 2 ...

Difficulty: 4/10

React Hooks

Introduction to React Hooks React Hooks are a new feature introduced in React 16.8 that allows you to use state and other React features in functional components without writing a class. This opens up a whole new way of writing React components and provides a more concise and expressive syntax....

Difficulty: 5/10

Ringpop at Uber

Exploring Ringpop: The Backbone of Uber's Scalability Setting the Stage: The Importance of Ringpop Uber operates on a massive scale, handling enormous amounts of traffic and user requests daily. The architecture behind this is no small feat, and one of the key components making it all po...

Difficulty: 5/10

Understanding Underlying Mechanisms

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Difficulty: 5/10

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A year ago, I started my final year as a Computer Science major at Dartmouth. After spending four years learning and developing new skills through coursework and internships, it was finally time to…

Why I joined Benchling as a software engineer new grad | by Steven Jiang | ...

Steven Jiang

A year ago, I started my final year as a Computer Science major at Dartmouth. After spending four years learning and developing new skills through coursework and internships, it was finally time to…

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