Persistent Full Stack Engineer Interview Questions

The questions to prepare for a Persistent Full Stack Engineer interview. Questions from real interview reports rank first. Updated daily.

13questions

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Technical FundamentalsStart here. 5 questions · ~40 min

Tests how interfaces and abstract classes differ in contracts, shared state, inheritance, and when to choose each.

Core Java and ConcurrencyMedium

Assesses deep Java knowledge and concurrency handling in real work scenarios.

javaconcurrency

Persistent

Node.js Event Loops and AsyncMedium

Evaluates understanding of Node.js asynchronous programming and lifecycle.

node.jsasynchronous

Persistent

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System Design4 questions · ~32 min

Microservices for Scalability and Fault ToleranceHard

Assesses microservice architecture decisions for resilience and scaling.

scalabilityfault tolerancemicroservices

Persistent

Design a Low-Level Payment SystemHard

Tests system design skills for a payment processing component with reliability and security.

system designarchitecture

Persistent

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More topics4 questions · ~32 min

Evaluates understanding of architectural separation and practical implementation.

Balancing Backend and FrontendMedium

Tests prioritization and cross-layer collaboration in delivery.

task management

Persistent

Architecture WalkthroughMedium

Tests your ability to explain system design decisions and trade-offs clearly.

project experiencearchitecture

Persistent

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