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Quess IT Staffing Software Engineer Interview Questions

The questions to prepare for a Quess IT Staffing Software Engineer interview. Questions from real interview reports rank first. Updated weekly.

50questions
~7htotal time
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1
CodingStart here. 18 questions · ~161 min
In-Place String ReversalEasy
Practice

Implement in-place reversal and swapping without extra memory using two pointers or arithmetic/XOR.

string manipulationQuess IT Staffing
Maximum Subarray Using KadaneEasy
Practice

Compute the maximum contiguous subarray sum in O(n) time using Kadane's Algorithm.

Basic AlgorithmsDynamic ProgrammingArraysQuess IT Staffing
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2
SQL & Data Manipulation8 questions + 2 drills · ~92 min
Second Highest Without AggregatesHard
Practice

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

SubqueriesRankingSelf-JoinsQuess IT Staffing
OLTP vs OLAP Database DesignMedium

Explain OLTP vs OLAP designs, including schema shape, workload patterns, and when each is appropriate in a data platform.

financial dataperformanceData ModelingQuess IT Staffing
SQL Queries for RankingMedium
Practice
Practice drill

Rank active HSBC employees by division and return every employee tied for the highest or second-highest salary.

javasqlHsbc
Rank Top Service CategoriesEasy
Practice
Practice drill

Use RANK() and grouped revenue to find ServiceTitan's top three service categories in each region.

RankingperformancesqlServiceTitan
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3
Execution3 questions · ~27 min
Rate Limited Resource-Heavy APIHard

Tests API design tradeoffs and resilience techniques for protecting backend resources.

Trade-offsrest apisrate limitingQuess IT Staffing
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4
Security & Infrastructure5 questions · ~45 min
SolarWinds L1 and Network BasicsMedium

Assesses infrastructure monitoring knowledge and core networking fundamentals.

NetworkingQuess IT Staffing
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5
Behavioral & Leadership12 questions · ~108 min
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6
More topics4 questions · ~36 min
ETL Dedup vs CleaningMedium

Tests data pipeline understanding and correct placement of quality steps in ETL.

Data QualityData WranglingETLQuess IT Staffing
Transactional in Spring Boot and API GatewaysMedium

Assesses Spring Boot transactional understanding and microservices API gateway design.

spring bootmicroservicesQuess IT Staffing
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The finish line: interview-readyComplete all 50 questions plus 2 hands-on drills to finish this plan.