LinkedIn Coding Interview Questions: 6 Tagged Problems
6 coding problems tagged LinkedIn — 1 easy · 3 medium · 2 hard — with solutions in 13 languages. Plus a study plan by topic.
- Problems: 6
- By difficulty: 1 easy · 3 medium · 2 hard
- Languages: JavaScript, TypeScript, Python, Java, C++, C, C#, Go, Kotlin, Swift, Rust, PHP and Ruby
- Cost: Free on every plan; sign in to run and submit
6 problems the CodeKairo catalogue tags as commonly asked in LinkedIn's coding rounds — 1 easy, 3 medium and 2 hard — each judged by hidden tests in 13 languages. The most common topics among them are Arrays (4), Hash Table (2) and Greedy (2). The tag is the catalogue's own annotation of where a problem tends to come up — not a list published by LinkedIn, which CodeKairo is not affiliated with.
LinkedIn study plan by topic
All 6 problems tagged LinkedIn, about 3 h 45 min of solving, grouped by technique in the order they build on each other — Greedy, Heap, Breadth-First Search and Union Find and 1 more.
The plan
6 problems on Greedy, Heap, Breadth-First Search, Union Find and Dynamic Programming, easiest first within each topic.
- Can Place Flowers Easy
- Find K Pairs with Smallest Sums Medium
- Smallest Range Covering Elements from K Lists Hard
- Word Ladder Hard
- Graph Valid Tree Medium
- Paint House Medium
All problems tagged LinkedIn
Easy (1)
- Can Place Flowers Array, Greedy
Medium (3)
- Find K Pairs with Smallest Sums Array, Heap (Priority Queue)
- Paint House Array, Dynamic Programming
- Graph Valid Tree Depth-First Search, Breadth-First Search, Union Find
Hard (2)
- Smallest Range Covering Elements from K Lists Array, Hash Table, Greedy
- Word Ladder Hash Table, String, Breadth-First Search
Topics LinkedIn asks most
- Arrays 4 problems
- Hash Table 2 problems
- Greedy 2 problems
- Heap 2 problems
- Breadth-First Search 2 problems
- Strings 1 problem
- Sliding Window 1 problem
- Sorting 1 problem
- Graph 1 problem
- Depth-First Search 1 problem
- Union Find 1 problem
- Dynamic Programming 1 problem