LinkedIn interview questions

Tell me about a time you had to navigate ambiguity or uncertainty in a project or role

Companies: LinkedIn, Bloomberg, Confluent, eBay +5

Last reported Sep 2026

Tell me how your role evolved as you became more senior in your current team.

Companies: LinkedIn

Last reported Sep 2026

What are you looking for in your next role?

What are you looking for in your next role.

Companies: LinkedIn, Rubrik, Stripe

Last reported Sep 2026

What are your short-term and long-term goals if you were to join this company?

Companies: LinkedIn, Tesla

Last reported Sep 2026

Design a Quota Manager for LinkedIn APIs

Design a quota management system for LinkedIn's API that enforces consistent rate limiting across clients and allows users to purchase additional quota when needed.

Companies: LinkedIn, Snowflake

Last reported Sep 2026

Design a Personalized Feed and Compare Ranking Objectives

Companies: LinkedIn

ML System Design · Recommendation Systems

Last reported Sep 2026

Kth Largest Element in an Array

Return the k-th largest element (by sorted order, not distinct) from an unsorted array. For inputs up to ~1e5 elements, solve it faster than full…

Companies: LinkedIn, Bloomberg, Meta, Salesforce +1

Array · Divide and Conquer · Heap (Priority Queue) · Quickselect

Last reported Sep 2026

Minimum Window Substring

Find the smallest substring of s that contains all characters of t (including duplicates), or return "" if none exists. This is typically solved with…

Companies: LinkedIn, Amazon, Lyft, Meta +2

Hash Table · Sliding Window · String

Last reported Sep 2026

Number of Subsequences That Satisfy the Given Sum Condition

Count the number of non-empty subsequences whose minimum plus maximum is ≤ target (answer mod 1e9+7). With n up to 1e5, the usual efficient approach…

Companies: LinkedIn

Last reported Sep 2026

Search in Rotated Sorted Array

Given an ascending array of distinct integers that has been rotated at an unknown pivot, return the index of a target value (or -1 if…

Companies: LinkedIn, Amazon, Expedia, Google +3

Array · Binary Search

Last reported Sep 2026

Closest Binary Search Tree Value II

Given a BST, a real-valued target and an integer k, return the k node values in the tree closest to the target. The challenge is…

Companies: LinkedIn, Amazon

Binary Search Tree · Binary Tree · Depth-First Search · Heap (Priority Queue)

Last reported Sep 2026

Design a Malicious IP Detection System

Design a system that can detect and block malicious IP addresses for an enterprise, including geo-distributed blacklists, edge processing capabilities, and efficient filtering…

Companies: LinkedIn

Last reported Sep 2026

Number of Islands

Count the number of islands (4-directionally connected components of '1's) in an m×n binary grid. This is a connected-components/flood-fill problem typically solved with…

Companies: LinkedIn, Amazon, Anduril, Apple +16

Array · Breadth-First Search · Depth-First Search · Matrix

Last reported Sep 2026

Number of Islands II

Given an initially all-water m×n grid, process a sequence of add-land operations and return the number of islands (4-directionally connected land components) after each…

Companies: LinkedIn, Microsoft, Uber

Array · Hash Table · Union-Find

Last reported Sep 2026

Paint House II

Given n houses and k paint colors with a cost matrix, choose a color for each house so no two adjacent houses share a color…

Companies: LinkedIn

Last reported Sep 2026

Candy

Given a line of children with integer ratings, assign each at least one candy so any child with a higher rating than a neighbor gets…

Companies: LinkedIn, Marvin, PayPal

Last reported Aug 2026

Describe a production incident you handled, including how you diagnosed the issue, mitigated the impact, communicated with stakeholders, and prevented recurrence.

Companies: LinkedIn, CrowdStrike, DoorDash, Stubhub

Last reported Aug 2026

Insert Delete GetRandom O(1)

Design a data structure supporting insert(val), remove(val), and getRandom() — which returns a uniformly random existing element — with each operation in average O(1) time…

Companies: LinkedIn, Amazon, Apple, Bloomberg +7

Array · Design · Hash Table · Math

Last reported Aug 2026

Letter Combinations of a Phone Number

Given a string of digits 2–9, return all possible letter strings by mapping each digit to its phone-keypad letters — effectively computing the Cartesian product…

Companies: LinkedIn, Amazon, Google, Microsoft +1

Backtracking · Hash Table · String

Last reported Aug 2026

Supply Outposts Minimum Distance

Given a tree of N outposts connected by N-1 bidirectional tunnels, process M queries that either designate an outpost as a Supply Outpost or find…

Companies: LinkedIn

Last reported Aug 2026

Tell me about a conflict you had at work.

The interviewer focused on a conflict that comes from different perspectives or ideas on how to execute a certain task.

Companies: LinkedIn, Adyen, Amazon, Capital One +18

Last reported Aug 2026

The Number of Ways to Make the Sum

Given a target sum and a list of positive integers (e.g., coin values), count how many distinct ways to form that sum under the problem's…

Companies: LinkedIn

Last reported Aug 2026