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Applovin Software Engineer Interview Questions

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

50questions
~10htotal time
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1
CodingStart here. 26 questions · ~326 min
Fibonacci (LeetCode 509)Easy
Practice

Compute the nth Fibonacci number using an iterative constant-space algorithm.

RecursionCodingBasic AlgorithmsAApplovin
Palindrome PermutationsMedium
Practice

Generate every unique palindrome permutation by backtracking over character counts.

deduplicationcombinatoricsstring manipulationAApplovin
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2
System Design5 questions · ~63 min
Design an LFU CacheHard

Implement an O(1) LFU cache with LRU tie-breaking and clearly defined eviction behavior.

low latencydistributed systemsdesignAApplovin
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3
Security & Infrastructure7 questions · ~88 min
OWASP Top 10 and MitigationsHard

Explain the OWASP Top 10 and apply practical mitigations for SQL injection and XSS.

backgroundapplication securityCommunicationAApplovin
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4
Behavioral & Leadership7 questions · ~88 min
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5
More topics5 questions · ~63 min
Interface vs Abstract ClassMedium

Tests how interfaces and abstract classes differ in contracts, shared state, inheritance, and when to choose each.

CommunicationOwnershipKotlinAApplovin
Query Anagrams from StringsMedium

Evaluates data modeling and efficient grouping for anagram queries.

string manipulationAApplovin
Optimize Grouping for Large DataHard

Evaluates pipeline performance strategies for large-scale grouping workloads.

AApplovin
Explain SQL InjectionEasy

Tests your understanding of SQL injection and the core prevention approach.

Trade-offsRisk AssessmentScope ManagementAApplovin
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Hands-on SQL practiceWrite and run real queries in the editor. 3 drills · ~30 min
Calculate 30-Day User RetentionHard
Practice
Practice drill

Use CTEs, joins, and date filtering to calculate 30-day retention by signup cohort from login and feature usage data.

Window FunctionsDate FunctionsAggregationsCurefitIndeedTikTok
7th Nearest Palindrome CodingHard
Practice
Practice drill

Return the seventh closest palindrome for each valid input number, using recursive query logic and ordered ranking.

Dynamic ProgrammingCTEscomplex queriesDeloitte
Anagram Check With SQLMedium
Practice
Practice drill

Compare normalized character signatures to determine whether each pair of strings is an anagram.

data cleaningJoinsstring manipulationAdobe
The finish line: interview-readyComplete all 50 questions plus 3 hands-on drills to finish this plan.