Benchling Interview Questions

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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

System Design Fundamentals

Introduction to System Design System design is the process of making decisions regarding the elements of a complex application. It involves contemplating the data models, overall architecture, modules and components, and interfaces. System design is important because it ensures speed, reliabili...

Difficulty: 5/10

Defining Virtual Memory Thrashing

Decoding Virtual Memory and Its Downside: Thrashing Introduction to Virtual Memory Virtual memory serves as an effective extension to your computer's physical RAM. The operating system cleverly manages memory between the hard disk and actual RAM, giving each program the feeling that it has ...

Difficulty: 5/10

Introduction to Data Structures

Introduction to Data Structures Welcome to the **Introduction to Data Structures** lesson! In this lesson, we will provide you with a brief overview of data structures on a theoretical level. Data structures are essential components in software development as they allow us to efficiently stor...

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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