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Built by students, for students — practice company-specific OAs, DSA sheets, and real interview experiences to land your dream role.

Ready to crack your next OA?

Practice company-specific questions trusted by thousands of students across India.

Start Practicing Go Premium

OA Practice·DSA·Placements

Disclaimer: OAHelper is an independent educational platform. We (oahelper.in) do not own the images or questions shown. Content is uploaded by users.

Topic Difficulty

Hard Union-Find OA Questions

Practice 28+ hard Union-Find coding questions from real online assessments. Filter by company, solve in the OAHelper editor, and prepare for company-wise OAs.

All Union-Find easy medium

Uber Zone ClustersuberHard Minimum Cost Uber NetworkuberHard Uber City Network ConstructionuberHard Maximize Scorecisco aiHard Minimum Sumadobe

Hard

2. Count Good PathshandsonHard

Server Network ConstructionaristaHard

Connect the Country 2harnessHard

Connected componentshilabsHard

FriendszomatoHard

Table ShrinkerrubrikHard

Morty's Galactic AdventurerubrikHard

Connected componentshilabsHard

Task Completion SimulationgrowthjockeyHard

Minimum Spanning Tree Edge Weight DifferencenaviHard

Save the StatesairtelHard

Minimum Operations to Make Array a Treelinkedin 31augHard

Airport Connectivity ChallengemakemytripHard

Cost of G-Good Setsinfosys 12julyHard

Reduce the DamagezetaHard

Blocking GridmyntraHard

Malware Spread ControlagodaHard

Maximum Minimum Distance from ObstacledocusignHard

Minimum Difference Spanning TreestonexHard

Kingdom of Graphoria Network OptimizationadobeHard

Connected Flower FieldflipkartHard

Count Matching Regionslinkdin 2febHard

Hotspot ConnectionsthoughtspotHard

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Hard Union-Find OA Questions | OAHelper