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.

8
Total Problems
0
Easy
6
Medium
2
Hard

Related Topics

ArrayDepth-First SearchBreadth-First SearchHash TableMatrixSortingStringGraph
#200MediumFrequency: 88%

Number of Islands

Asked at Salesforce
ArrayDepth-First SearchBreadth-First SearchUnion FindMatrix
#1
Rank
#305HardFrequency: 79%

Number of Islands II

Asked at Uber
ArrayHash TableUnion Find
#2
Rank
#1085MediumFrequency: 67%

The Earliest Moment When Everyone Become Friends

Asked at Google
ArrayUnion FindSorting
#3
Rank
#399MediumFrequency: 63%

Evaluate Division

Asked at Uber
ArrayStringDepth-First SearchBreadth-First SearchUnion FindGraphShortest Path
#4
Rank
#721MediumFrequency: 62%

Accounts Merge

Asked at Meta
ArrayHash TableStringDepth-First SearchBreadth-First SearchUnion FindSorting
#5
Rank
#694MediumFrequency: 62%

Number of Distinct Islands

Asked at TikTok
Hash TableDepth-First SearchBreadth-First SearchUnion FindHash Function
#6
Rank
#854HardFrequency: 60%

Making A Large Island

Asked at Meta
ArrayDepth-First SearchBreadth-First SearchUnion FindMatrix
#7
Rank
#128MediumFrequency: 55%

Longest Consecutive Sequence

Asked at Microsoft
ArrayHash TableUnion Find
#8
Rank
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