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Top 50 Software Engineer Interview Questions

The 50 most important questions to prepare for Software Engineer interviews. Questions from real interview reports rank first. Updated weekly.

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1
CodingStart here. 27 questions · ~613 min
Linked List ReversalEasy
Practice
Recently asked

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

RecursionLinked ListsArraysPearlRapid Ratings InternationalCoBank
Two Sum with TargetEasy
Practice
Recently asked

Use a hash map to find two array elements that sum to a target in O(n) time.

Hash TablesArraysStringsEsystemsBungalowSide
Reverse a StringEasy
Practice
Recently asked

Reverse a string using a two-pointer swap approach and explain the trade-off between in-place and copied results.

RecursionArraysStringsBroadridge Financial SolutionsDDXCCNA
Implement Binary Search AlgorithmMedium
Practice
Recently asked

Write a binary search function to find a target value in a sorted array.

SearchingBookingConverseonWestern Digital
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2
SQL & Data Manipulation23 questions · ~522 min
Second Highest Without AggregatesMedium
Practice
Recently asked

Find the second highest salary in each department without using aggregate functions.

SubqueriesRankingSelf-JoinsMicron Memory Malaysia Sdn BhdInformaticaExusia
Second Highest Trader SalaryEasy
Practice
Recently asked

Find the second highest distinct salary from a single table using basic PostgreSQL ordering and limiting.

SubqueriesRankingSortingAntraWNSState Street
Classify Customer Membership by Total SpendMedium
Practice

Aggregate customer spending and classify membership status using JOINs, GROUP BY, and CASE WHEN.

ChenegaColgate-PalmoliveArgus Information & Advisory Services
Top Paid Per DepartmentMedium
Practice
Recently asked

Find the top 3 highest-paid employees in each department using window functions.

Window FunctionsRankingBrillioAubay SpainCollaborative Real Estate
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