Union Find Interview Questions

Rank

#1085MediumFrequency: 67%

The Earliest Moment When Everyone Become Friends

Asked at Google

Array Union Find Sorting

Rank

#399MediumFrequency: 63%

Evaluate Division

Array String Depth-First Search Breadth-First Search Union Find Graph Shortest Path

Rank

#721MediumFrequency: 62%

Accounts Merge

Array Hash Table String Depth-First Search Breadth-First Search Union Find Sorting

Rank

#694MediumFrequency: 62%

Number of Distinct Islands

Asked at TikTok

Hash Table Depth-First Search Breadth-First Search Union Find Hash Function

Rank

#854HardFrequency: 60%

Making A Large Island

Array Depth-First Search Breadth-First Search Union Find Matrix

Rank

#128MediumFrequency: 55%

Longest Consecutive Sequence

Asked at Microsoft

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Union Find Interview Questions

Master 8 union find problems frequently asked in technical interviews. These questions test your understanding of union findconcepts and are essential for coding interview success.

Total Problems

Easy

Medium

Hard

Number of Islands

Asked at Salesforce

Array Depth-First Search Breadth-First Search Union Find Matrix

Rank

#305HardFrequency: 79%

Number of Islands II

Rank

#1085MediumFrequency: 67%

The Earliest Moment When Everyone Become Friends

Asked at Google

Array Union Find Sorting

Rank

#399MediumFrequency: 63%

Evaluate Division

Array String Depth-First Search Breadth-First Search Union Find Graph Shortest Path

Rank

#721MediumFrequency: 62%

Accounts Merge

Array Hash Table String Depth-First Search Breadth-First Search Union Find Sorting

Rank

#694MediumFrequency: 62%

Number of Distinct Islands

Asked at TikTok

Hash Table Depth-First Search Breadth-First Search Union Find Hash Function

Rank

#854HardFrequency: 60%

Making A Large Island

Array Depth-First Search Breadth-First Search Union Find Matrix

Rank

#128MediumFrequency: 55%

Longest Consecutive Sequence

Asked at Microsoft