Top 34
Prep plan
Updated weekly · Last refresh Aug 30

WhiteHat Jr Software Engineer Interview Questions

The questions to prepare for a WhiteHat Jr Software Engineer interview. Questions from real interview reports rank first. Updated weekly.

34questions
~6htotal time
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1
CodingStart here. 13 questions · ~135 min
Linked List ReversalEasy
Practice

Reverse a singly linked list in-place using iterative pointer manipulation.

RecursionLinked ListsArraysWhiteHat Jr
Longest Unique Substring in EnoMedium
Practice

Use a sliding window and hash map to find the longest substring without repeated characters in a string.

Hash TablesStringsTwo PointersWhiteHat Jr
Check Palindrome StringEasy
Practice

Use a two-pointer string scan to determine whether a string reads the same forward and backward.

RecursionStringsData StructuresWhiteHat Jr
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2
SQL & Data Manipulation3 questions + 3 drills · ~61 min
3
Behavioral & Leadership15 questions · ~156 min
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4
More topics3 questions · ~31 min
Design URL Shortening ServiceHard

Tests system design skills for a high-availability, scalable web service.

Trade-offsSuccess CriteriaRisk AssessmentWhiteHat Jr
Data Consistency in Distributed SystemsHard

Tests distributed systems knowledge, consistency models, and failure handling.

distributed systemsscalabilitydata consistencyWhiteHat Jr
Architecting a Real-Time ChatHard

Tests your real-time system design skills including messaging, concurrency, and delivery guarantees.

InfrastructureRisk AssessmentDependenciesWhiteHat Jr

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The finish line: interview-readyComplete all 34 questions plus 3 hands-on drills to finish this plan.