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Grammarly interview questions

The most frequent LeetCode problems tagged to Grammarly. This is a data-only page. For process and behavioral prep, use the coding guide and behavioral guide.

Based on 9 distinct problems tagged to Grammarly in the last 6 months (5 in the last 30 days, 6 in the last 3 months, 30 all-time) across two open datasets of LeetCode company tags. Tags are user-reported, so treat frequency as a signal, not a promise.

Difficulty mix (last 6 months): Medium 67%, Easy 22%, Hard 11%

Most tagged topics (share of problems): Array 67%, String 56%, Dynamic Programming 33%, Hash Table 33%, Sorting 22%, Binary Search 22%, Depth-First Search 22%, Greedy 11%, Heap (Priority Queue) 11%, Tree 11%

Watch out: Grammarly has thin LeetCode data. Weight the reported questions and the format notes above more than this list.

Most frequent problems

Ranked by frequency, weighted toward the last 30 days. Classics like Two Sum sit near the top of almost every company's list because users tag them everywhere. Solve those fast. The signature list below is more specific to this company.

# Problem Difficulty Last seen Topics
1 Non-overlapping Intervals Medium 30 days Array, Dynamic Programming, Greedy, Sorting
2 Two Best Non-Overlapping Events Medium 30 days Array, Binary Search, Dynamic Programming, Sorting
3 Recover a Tree From Preorder Traversal Hard 30 days String, Tree, Depth-First Search, Binary Tree
4 Search Insert Position Easy 30 days Array, Binary Search
5 Minimum Substring Partition of Equal Character Frequency Medium 30 days Hash Table, String, Dynamic Programming, Counting
6 Word Search Medium 3 months Array, String, Backtracking, Depth-First Search
7 Remove All Adjacent Duplicates In String Easy 6 months String, Stack
8 Insert Delete GetRandom O(1) Medium 6 months Array, Hash Table, Math, Design
9 Vowel Spellchecker Medium 6 months Array, Hash Table, String

Signature problems

Problems where Grammarly accounts for a large share of all recent tags across companies. These are the most Grammarly-specific questions in the data.

# Problem Difficulty Last seen Topics
1 Non-overlapping Intervals Medium 30 days Array, Dynamic Programming, Greedy, Sorting
2 Two Best Non-Overlapping Events Medium 30 days Array, Binary Search, Dynamic Programming, Sorting
3 Recover a Tree From Preorder Traversal Hard 30 days String, Tree, Depth-First Search, Binary Tree
4 Minimum Substring Partition of Equal Character Frequency Medium 30 days Hash Table, String, Dynamic Programming, Counting
5 Vowel Spellchecker Medium 6 months Array, Hash Table, String

Sources

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