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Updated weekly · Last refresh Oct 17

ZoomInfo Technologies Software Engineer Interview Questions

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

50questions
~10htotal time
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1
CodingStart here. 24 questions · ~285 min
Print All Digits of a NumberEasy
Practice

Print the digits of an integer in order using simple arithmetic or recursion.

RecursionArraysZoomInfo Technologies
Search in a Sorted Rotated ArrayMedium
Practice

Find a target in a rotated sorted array using modified binary search.

binary searchArraysAlgorithmsZoomInfo Technologies
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2
System Design8 questions · ~95 min
3
SQL & Data Manipulation5 questions + 1 drill · ~69 min
Complex SQL and RecursionHard
Practice

Build a recursive employee hierarchy query that returns each reachable employee, depth, root, and complete reporting path.

data relationshipsCTEscomplex queriesZoomInfo Technologies
SQL for Activity and User MetricsHard
Practice
Practice drill

Aggregate ZoomInfo Engage activities by type and date, include zero-activity combinations, and calculate day-over-day changes.

queriessqlZoomInfoZoomInfo Technologies
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4
Behavioral & Leadership6 questions · ~71 min
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5
More topics7 questions · ~83 min
Network Fundamentals and SecurityHard

Evaluates your breadth of networking knowledge and security concepts.

NetworkingSecurityZoomInfo Technologies
HTML/CSS/JS/HTTP FundamentalsEasy

Assesses your core web fundamentals and ability to explain how the web works.

cssZoomInfo Technologies
Real-Time Notifications SystemHard

Tests system design skills for real-time eventing, subscriptions, and multi-channel notifications.

Trade-offsSuccess CriteriaarchitectureZoomInfo Technologies
Microservices Architecture and ScalabilityMedium

Tests system design communication and ability to reason about scalability and service boundaries.

recent projectsscalabilitytechnical experienceZoomInfo Technologies
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The finish line: interview-readyComplete all 50 questions plus 1 hands-on drill to finish this plan.