All LinkedIn Coding Interview Questions
140 questions we track for LinkedIn, most frequently asked first. Practice any of them in the code editor and get AI feedback on your solution.
Start your LinkedIn mock interviewQuestions LinkedIn asks, live voice, scored. First one free.
- Junior17% (24)
- Mid/Senior64% (90)
- Staff19% (26)
Questionspage 1 of 2
- Two Sum129 companiesJunior
- Longest Substring Without Repeating Characters112 companiesMid/Senior
- Median of Two Sorted Arrays47 companiesStaff
- Longest Palindromic Substring76 companiesMid/Senior
- Reverse Integer26 companiesMid/Senior
- Integer to Roman32 companiesMid/Senior
- Roman to Integer45 companiesJunior
- Letter Combinations of a Phone Number40 companiesMid/Senior
- 4Sum19 companiesMid/Senior
- Valid Parentheses119 companiesJunior
- Merge Two Sorted Lists40 companiesJunior
- Merge k Sorted Lists53 companiesStaff
- Find the Index of the First Occurrence in a String17 companiesJunior
- Longest Valid Parentheses28 companiesStaff
- Search in Rotated Sorted Array55 companiesMid/Senior
- Find First and Last Position of Element in Sorted Array31 companiesMid/Senior
- Valid Sudoku30 companiesMid/Senior
- Combination Sum30 companiesMid/Senior
- Combination Sum II17 companiesMid/Senior
- Permutations26 companiesMid/Senior
- Permutations II9 companiesMid/Senior
- Pow(x, n)23 companiesMid/Senior
- Maximum Subarray66 companiesMid/Senior
- Merge Intervals109 companiesMid/Senior
- Insert Interval16 companiesMid/Senior
- Rotate List12 companiesMid/Senior
- Unique Paths22 companiesMid/Senior
- Valid Number7 companiesStaff
- Text Justification40 companiesStaff
- Sqrt(x)19 companiesJunior
- Edit Distance31 companiesMid/Senior
- Minimum Window Substring34 companiesStaff
- Word Search40 companiesMid/Senior
- Largest Rectangle in Histogram32 companiesStaff
- Merge Sorted Array38 companiesJunior
- Validate Binary Search Tree20 companiesMid/Senior
- Same Tree9 companiesJunior
- Symmetric Tree11 companiesJunior
- Binary Tree Level Order Traversal14 companiesMid/Senior
- Binary Tree Zigzag Level Order Traversal19 companiesMid/Senior
- Maximum Depth of Binary Tree16 companiesJunior
- Best Time to Buy and Sell Stock90 companiesJunior
- Word Ladder II16 companiesStaff
- Word Ladder40 companiesStaff
- Longest Consecutive Sequence40 companiesMid/Senior
- Word Break32 companiesMid/Senior
- Linked List Cycle25 companiesJunior
- Reorder List16 companiesMid/Senior
- Max Points on a Line16 companiesStaff
- Evaluate Reverse Polish Notation18 companiesMid/Senior
- Reverse Words in a String29 companiesMid/Senior
- Maximum Product Subarray25 companiesMid/Senior
- Find Minimum in Rotated Sorted Array17 companiesMid/Senior
- Repeated DNA Sequences7 companiesMid/Senior
- House Robber38 companiesMid/Senior
- Number of Islands81 companiesMid/Senior
- Isomorphic Strings15 companiesJunior
- Reverse Linked List34 companiesJunior
- Course Schedule41 companiesMid/Senior
- Course Schedule II35 companiesMid/Senior
- House Robber II19 companiesMid/Senior
- Kth Largest Element in an Array42 companiesMid/Senior
- Invert Binary Tree10 companiesJunior
- Kth Smallest Element in a BST11 companiesMid/Senior
- Lowest Common Ancestor of a Binary Search Tree10 companiesMid/Senior
- Lowest Common Ancestor of a Binary Tree22 companiesMid/Senior
- Product of Array Except Self44 companiesMid/Senior
- Shortest Word Distance8 companiesJunior
- Paint House8 companiesMid/Senior
- Graph Valid Tree8 companiesMid/Senior
- Integer to English Words23 companiesStaff
- H-Index8 companiesMid/Senior
- Expression Add Operators7 companiesStaff
- Best Meeting Point9 companiesStaff
- Sparse Matrix Multiplication9 companiesMid/Senior
- Bulb Switcher9 companiesMid/Senior
- Number of Connected Components in an Undirected Graph8 companiesMid/Senior
- House Robber III15 companiesMid/Senior
- Find Leaves of Binary Tree6 companiesMid/Senior
- Valid Perfect Square7 companiesJunior
- Find K Pairs with Smallest Sums10 companiesMid/Senior
- First Unique Character in a String26 companiesJunior
- Delete Node in a BST11 companiesMid/Senior
- Can I Win4 companiesMid/Senior
- The Maze14 companiesMid/Senior
- Find Largest Value in Each Tree Row8 companiesMid/Senior
- Longest Palindromic Subsequence14 companiesMid/Senior
- 01 Matrix15 companiesMid/Senior
- Subarray Sum Equals K46 companiesMid/Senior
- Can Place Flowers16 companiesJunior
- Valid Triangle Number9 companiesMid/Senior
- Merge Two Binary Trees8 companiesJunior
- Task Scheduler25 companiesMid/Senior
- Smallest Range Covering Elements from K Lists10 companiesStaff
- Sum of Square Numbers7 companiesMid/Senior
- Exclusive Time of Functions13 companiesMid/Senior
- Palindromic Substrings25 companiesMid/Senior
- Find K Closest Elements19 companiesMid/Senior
- Second Minimum Node In a Binary Tree2 companiesJunior
- Valid Parenthesis String15 companiesMid/Senior