Knowledge Checks

Verify Your Expertise.

Take our Staff-tier assessments to solidify your understanding. Score 80%+ to unlock verified badges on your public profile.

Java Internals Assessment

Test your knowledge on JVM, Garbage Collection, Concurrency, and Memory Management.

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Spring Boot Architecture

Assess your understanding of Spring AOP, proxies, @Transactional, and Bean scopes.

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MySQL & Database Scaling

Evaluate your expertise in B-Trees, Isolation Levels, Sharding, and Query Optimization.

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System Design Assessment

Evaluate your expertise in consistent hashing, rate limiting, saga pattern, and microservices.

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API Design & Integration

Test your expertise in REST constraints, gRPC schemas, GraphQL queries, rate limiting, and OAuth.

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Distributed Systems & Transactions

Test your expertise in Raft/Paxos consensus, CAP/PACELC, Saga pattern, 2PC, event sourcing, and idempotency.

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Concurrency & Multithreading

Test your expertise in thread safety, JVM Memory Model, locks, ExecutorServices, fork-join, and CAS.

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LLD & Design Patterns

Test your expertise in SOLID principles, Creational/Structural/Behavioral design patterns, and OOP modeling.

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Cloud Architecture & DevOps

Test your expertise in Docker containerization, Kubernetes orchestration, CI/CD pipelines, IaC, and VPC routing.

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Observability, Metrics & Tracing

Test your expertise in Prometheus metrics, OpenTelemetry, trace context propagation, structured logging, and SLOs.

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Data Structures & Algorithms

Test your expertise in Big-O analysis, core data structures (trees, heaps), sliding window, binary search, and dynamic programming.

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Caching Strategies & Eviction

Test your expertise in Cache-Aside, Write-Behind, cache eviction algorithms (LRU/LFU/ARC), Cache Stampede, and Bloom filters.

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Backend Security & Cryptography

Test your expertise in TLS handshakes, symmetric/asymmetric encryption, bcrypt/Argon2, OAuth 2.0 flow, JWTs, and OWASP top 10 prevention.

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Message Brokers & Event-Driven

Test your expertise in Kafka partitions, consumer groups, RabbitMQ exchanges, Event Sourcing, Outbox pattern, and Saga orchestration.

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