LinkedIn Interview Questions

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

Find Duplicate Words

A very common interview challenge is to determine how often words appear in a given string or set of strings. Here's a version of this: return a list of duplicate words in a sentence. For example, given 'The dog is the best' , returns "the" . Likewise, given 'Happy thanksgiving, I am s...

Difficulty: 4/10

Nth Smallest Number in a Stream

Many modern programming languages have the notion of a stream. A stream is a resource _that's broken down_ and sent usually over a network in small chunks. Imagine a video that's playing it would be inefficient to need to download an entire 1 gigabyte movie before being able to watch it. Inste...

Difficulty: 7/10

Sum of Perfect Squares

A perfect square is a number made by squaring a whole number. Some examples include 1 , 4 , 9 , or 16 , and so on because they are the squared results of 1 , 2 , 3 , 4 , etc. For example: 1 2 1 2 2 4 3 2 9 4 2 16 ... However, 15 is not a perfect square, bec...

Difficulty: 7/10

Validate Palindrome

Given a string str , can you write a method that will return True if is a palindrome and False if it is not? If you'll recall, a palindrome is defined as "a word, phrase, or sequence that reads the same backward as forward". For now, assume that we will not have input strings that contain spec...

Difficulty: 3/10

Max Product of Three Numbers

Given an unsorted array of integers, can you write a method maxProductOfThree unsorted: array to find the largest product from three of the numbers? For example, given the following array: 1, 9, 22, 3, 15, 7 The largest product of three numbers is 2310 . This results from 15 * 7 * 22 ...

Difficulty: 5/10

Least Missing Positive Number

We have an unsorted array of integers such as the following: 0, 3, 1, 2, 1 csharp if len 2 return Math.Max nums 0 , nums 1 In the above example, the minimum number is 2 and the maximum is 3 . If it were sorted, it would look like: 2, 1, 0, 1, 3 csharp ...

Difficulty: 4/10

Split Set to Equal Subsets

We're given a set in the form of an array with a unique integers. Can you write a function that tells us whether it can be separated into two subsets whose elements have equal sums? Here's an example: 5, 9, 7, 21 : The below would return true because newSet can be divided into 5, 9, 7 ...

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

Levenshtein Edit Distance

An edit distance is a way to quantify how different two strings are. This is calculated using **the minimum number of transformations to turn one string to another**. The transformations include insertion , deletion , and substitution . So when comparing two identical strings, say cat and ca...

Difficulty: 7/10

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

Breaking Into Software? Hiring Secrets You Must Know From a Tech Career Advisor

This lesson is an interview done with Dan Adeyanju, a technical career coach and former software developer, who helps us understand the landscape of modern engineering recruiting. **Dan, why don t we start by having you introduce yourself?** Hey all, my name is Daniel, and I unlock tech car...

Difficulty: 5/10

Technical Recruiting: How to Work With Recruiters

The demand for tech workers is constantly growing as companies attempt to push the boundaries of digitalization and innovation. Tech positions such as software development, UX design, and data analysis are currently in high demand, but the talent pool for many such tech roles is limited. In order f...

Difficulty: 5/10

People at LinkedIn Say

This information was sourced from reviews originally posted on Glassdoor.

Good perks and vacations with week long shutdowns twice a year. Good food and we'll perceived brand name. Also stocks are appreciating, thanks to Microsoft cloud. Technology stack sucks and the network effect of selling yourself to get promotion has led to engineers not focusing on companies success but individual promotion. Very few teams actually do real good work. Get rid of this toxic promotion driven environment. You will lose good engineers who actually put in hard work.

Work/life balance. Matching 401k. Excellent food. Unlimited PTO that people actually take. Lots of smart people. We still feel mostly independent after the Microsoft aquisition. Interesting projects. Many native Chinese speakers prefer to work in Chinese. This had led some managers to build homogenous teams based on race. LinkedIn, being a job searching platform, celebrates when people find their #nextplay, which sounds fine, but is also their way of ignoring problems with retention.

Great perks, great culture with a lot of emphasis on professional development and personal growth. Great work-life balance. Management very focused on listening to employees and keeping employees happy. I have only worked here a couple of months. Nothing too negative has made itself apparent to me thus far. Keep up the good work, mostly! Instituting a no-meeting day company-wide is one of my wish list items.

Excellent pay: including stock, 10% discounted ESPP for up to 15% of your salary, 50% match on 401(k). Unlimited vacation time, including company shut down from Christmas to new years and 1 week shut down for 4th of July. Flexible hours: no one care when you come in/out or work from home as long as you get things done. Good work/life balance. The company has programs that encourage happiness, health and well being, like on-site gym and $2000 annual wellness allowance, monthly indays. Fair performance evaluation and room for growth. Plenty of tech talks for you to improve yourself. LinkedIn's titles are a little inflated in comparison with other companies (e. g. other companies take longer to get to senior), so it'd be to your advantage when jumping to another company.