Dataford
Top 18
Prep plan
Updated weekly · Last refresh Sep 26

RoundCircle Software Engineer Interview Questions

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

18questions
~3htotal time
Track your progressSign up free to work through all 18 questions and resume where you left off.
Start practicing free →
1
System DesignStart here. 5 questions · ~51 min
Design a URL Shortening ServiceHard

Design a URL shortening service that routes, ranks, and monitors links at scale.

Feature StoreModel ServingRoundCircle
Web Request-Response LifecycleMedium

Tests understanding of HTTP flow and how web requests are processed end to end.

lifecycleRoundCircle
More System Design questions with a free account
2
Coding10 questions · ~102 min
Time Complexity of Sorting AlgorithmsEasy

Compare common sorting algorithms by best, average, and worst-case time complexity and explain when each is appropriate.

MathArraysSortingRoundCircle
Basic Sorting and Linked ListsEasy

Assesses foundational DSA knowledge and your approach to common data structures and algorithms.

SortingbasicsData StructuresRoundCircle
Sliding Window Problem SolvingMedium

Evaluates problem decomposition and efficient state maintenance for sliding window patterns.

Sliding WindowAlgorithmsRoundCircle
More Coding questions with a free account

Sign up to see every question

Create a free account to unlock this list and practice real interview questions.

Get my prep plan
3
More topics3 questions · ~31 min
Indexing and Database PerformanceMedium

Evaluates how indexing impacts query speed, storage, and write performance.

indexingsqlRoundCircle
OSI Model and Web RequestsMedium

Assesses networking fundamentals and mapping of layers to real web traffic behavior.

NetworkingRoundCircle
Debugging Production IssuesMedium

Tests incident triage, hypothesis-driven debugging, and safe mitigation in live systems.

production issuesDebuggingRoundCircle
Hands-on SQL practiceWrite and run real queries in the editor. 3 drills · ~30 min
SQL Data Structure ReviewHard
Practice
Practice drill

Audit PostgreSQL metadata for missing or invalid keys and tables with inefficient sequential-scan patterns.

database optimizationindexesData StructuresMercury
SQL Sort QueryEasy
Practice
Practice drill

Sort Thales Ground Master radar readings by signal strength in ascending order, placing unknown values last.

SortingsqlThales
SQL Sorting and OrderingEasy
Practice
Practice drill

Sort every employee by salary from lowest to highest, placing missing salaries last.

Data ManipulationSortingsqlCondé Nast
The finish line: interview-readyComplete all 18 questions plus 3 hands-on drills to finish this plan.