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Updated weekly · Last refresh Oct 17

Coalition Greenwich Software Engineer Interview Questions

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

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CodingStart here. 20 questions · ~196 min

Second Largest Without SortingMedium

Practice

Find the second distinct largest value in an unsorted array using one pass and constant extra space.

ArraysSortingProgramming

Coalition Greenwich

Palindrome String ProgramEasy

Practice

Use two pointers to determine whether a CSG asset label reads identically forward and backward.

Strings

Coalition Greenwich

Running Java Without JDKMedium

Evaluates knowledge of Java toolchain components and runtime requirements.

java

Coalition Greenwich

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SQL & Data Manipulation5 questions + 2 drills · ~69 min

Second Highest Without AggregatesHard

Practice

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

SubqueriesRankingSelf-Joins

Coalition Greenwich

Explain ACID in Transaction SystemsEasy

Explain the four ACID properties and why they matter for reliable transaction processing in SQL systems.

acid propertiestransactionsdata integrity

Coalition Greenwich

SQL for Top CustomersEasy

Practice

Practice drill

Use a CTE, join, date filter, and aggregation to find the top 10 Coalition Greenwich customers by Q1 revenue.

sql query

Coalition Greenwich

Java Core Concepts and SQL BasicsMedium

Practice

Practice drill

Explain core Java concepts and produce an aggregated SQL access summary using joins.

javaJoinssql

Saviynt

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More topics4 questions · ~39 min

Microservices Inter-Service CommunicationMedium

Tests your understanding of common communication patterns between microservices.

Communicationmicroservices

Coalition Greenwich

Securing Microservice CommunicationHard

Assesses your approach to securing data and requests across microservices.

Securitymicroservices

Coalition Greenwich

Microservices Design PatternHard

Evaluates your ability to explain and apply microservices design principles.

design patternsmicroservices

Coalition Greenwich