Browse LeetCode problems frequently asked by Hubspot. Filter by difficulty and timeframe to focus your interview prep.
Last updated: 20 Feb 2026
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Xing
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30 days
3 months
6 months
More than 6 months
All
Easy
Medium
Hard
All
Problem
Difficulty
Frequency
Topics
Two Sum
EASY
75%
ArrayHash Table
Maximum Number of Occurrences of a Substring
MEDIUM
75%
Hash TableStringSliding Window
Merge Two Sorted Lists
EASY
75%
Linked ListRecursion
Merge Sorted Array
EASY
87.5%
ArrayTwo PointersSorting
Top K Frequent Elements
MEDIUM
50%
ArrayHash TableDivide and ConquerSortingHeap (Priority Queue)Bucket SortCountingQuickselect
Merge k Sorted Lists
HARD
50%
Linked ListDivide and ConquerHeap (Priority Queue)Merge Sort
Merge Intervals
MEDIUM
75%
ArraySorting
Find the K-Sum of an Array
HARD
50%
ArraySortingHeap (Priority Queue)
Meeting Rooms II
MEDIUM
62.5%
ArrayTwo PointersGreedySortingHeap (Priority Queue)Prefix Sum
Find the Celebrity
MEDIUM
100%
Two PointersGraph TheoryInteractive
Simple Bank System
MEDIUM
75%
ArrayHash TableDesignSimulation
Memoize
MEDIUM
50%
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