Dataford
Top 43
Prep plan
Updated weekly · Last refresh Aug 30

Andela Products Backend Engineer Interview Questions

The questions to prepare for a Andela Products Backend Engineer interview. Questions from real interview reports rank first. Updated weekly.

43questions
~6htotal time
Track your progressSign up free to work through all 43 questions and resume where you left off.
Start practicing free →
1
CodingStart here. 9 questions · ~76 min
Linked List or Binary Tree ImplementationEasy
Practice

Reverse an inclusive linked-list segment in place using pointer manipulation with O(n) time and O(1) extra space.

function implementationLinked ListsAndela Products
More Coding questions with a free account
2
SQL & Data Manipulation5 questions + 3 drills · ~72 min
SQL vs NoSQL Trade-offsEasy

Explain SQL vs NoSQL trade-offs, including schema design, consistency, scaling, and query flexibility.

JoinsData WranglingAggregationsAndela Products
Zero-Downtime PostgreSQL Schema MigrationsHard

Explain how to run PostgreSQL schema migrations without downtime while preserving compatibility, integrity, and performance.

schema migrationsdatabase managementproduction environmentAndela Products
Top Active Users Per RegionMedium
Practice
Practice drill

Rank the three most active Alteryx users per region using CTEs, aggregation, date filtering, and ROW_NUMBER.

Window FunctionsJoinsAggregationsAlteryxAndela Products
7-Day Rolling Retention SQLMedium
Practice
Practice drill

Calculate daily Khan Academy seven-day rolling retention using CTEs, deduplication, date ranges, and a self-join.

Window FunctionsDate FunctionsRunning TotalsDropboxAndela ProductsKhan Academy
Analyzing Operations Bottlenecks with SQLHard
Practice
Practice drill

Use multi-level CTEs, joins, and LAG to identify Samsung regional inventory shortages and late deliveries.

JoinsperformanceAggregationsSamsung ElectronicsApeel Sciences
More SQL & Data Manipulation 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
System Design14 questions · ~118 min
Design a URL Shortening ServiceHard

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

Feature StoreModel ServingAndela Products
Microservice Design PatternsMedium

Evaluates your knowledge of microservice patterns and when to apply them.

design patternsmicroservicesAndela Products
More System Design questions with a free account
4
Execution5 questions · ~42 min
Optimize Node.js Memory-Heavy TasksMedium

Tests your ability to improve Node.js performance and manage memory for backend workloads.

memory managementperformance optimizationnode.jsAndela Products
Troubleshoot Production API LatencyHard

Evaluates your debugging approach for diagnosing and resolving production performance issues.

TroubleshootingAndela Products
More Execution questions with a free account
5
Behavioral & Leadership9 questions · ~76 min
More Behavioral & Leadership questions with a free account
6
More topics1 question · ~8 min
Zero-Downtime Database MigrationsMedium

Assesses your approach to evolving schemas safely without impacting production availability.

deployment strategiesAndela Products
The finish line: interview-readyComplete all 43 questions plus 3 hands-on drills to finish this plan.