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.
- 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