Top 50
Prep plan
Updated weekly · Last refresh Oct 17

ZoomInfo Software Engineer Interview Questions

The questions to prepare for a ZoomInfo Software Engineer interview. Questions from real interview reports rank first. Updated daily.

50questions
~8htotal time
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1
CodingStart here. 17 questions · ~159 min
Longest PalindromeMedium
Practice

Use center expansion to find the longest palindromic substring in a Sumo Logic log fragment.

Dynamic Programmingstring manipulationZoomInfo
Two Sum Index LookupEasy
Practice

Find two indices in an array whose values sum to a target using a hash table in O(n) time.

Hash TablesArraysTwo PointersZoomInfo
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2
System Design8 questions · ~75 min
Design Outbound Email QueuingMedium

Evaluates system design for reliable outbound email delivery using queues.

ZoomInfo
Document Search and StreamingHard

Assesses your system design skills for search and event-driven architectures.

ZoomInfo
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3
SQL & Data Manipulation3 questions + 3 drills · ~58 min
4
Execution17 questions · ~159 min
Scalable Login Flow DesignHard

Tests your system design for authentication scalability, reliability, and security considerations.

InfrastructureTrade-offsRisk AssessmentZoomInfo
Microservices ConsiderationsHard

Tests your ability to reason about operational complexity, data consistency, and deployment strategy.

InfrastructureTrade-offsRisk AssessmentZoomInfo
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5
Behavioral & Leadership5 questions · ~47 min
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The finish line: interview-readyComplete all 50 questions plus 3 hands-on drills to finish this plan.