Questions
3 of 5
Basics
Cluster Architecture
Topics, Partitions and Records
Producers
Consumers
Consumer Groups
Offset Management
Replication and Fault Tolerance
Storage Internals
Networking and Request Processing
Performance and Throughput
Delivery Semantics
Transactions
Kafka Streams
Kafka Connect
Schema and Serialization
Security
Error Handling and Retry Patterns
Ordering and Partitioning Design
Testing
Monitoring and Observability
Debugging and Troubleshooting
Deployment and Operations
Admin and CLI Operations
Reliability and Disaster Recovery
Integration Patterns
Modern Kafka Architecture
Advanced Internals
Scalability and Capacity Planning
Architecture and System Design
Production Best Practices
Expert Edge Cases
Versioning and Upgrades
Admin and CLI Operations
Senior End-to-End Scenarios
Difficulty: 6/10
Configuration, Configuration precedence, Dynamic broker configuration
Debugging Kafka configuration precedence
I identify the topic, broker, and observed behavior, then inspect topic-level configuration and broker configuration separately. Kafka configuration is scoped: some settings are topic-level, some broker-level, and some client-side. A topic override or dynamic broker override may explain why behavior differs from a static configuration file. I verify the effective value and its source instead of assuming that the file on disk is authoritative.
javascript
- 1
Inspect topic overrides for settings such as retention.ms and cleanup.policy. If no override exists, confirm the inherited default for the installed version.
- 2
Inspect dynamic broker overrides as well as static configuration. Precedence and support depend on the setting and Kafka version.
- 3
Do not confuse broker settings with producer or consumer settings; client batching and fetch behavior are also controlled by client configuration.
- 4
Some changes apply dynamically, while others require a restart or affect only newly created resources. Verify the setting's documented behavior for the deployed version.
- 5
Common mistake: editing server.properties and assuming a running broker immediately uses the new value.
- 6
Configuration inspection options and supported dynamic settings have evolved. Validate command syntax and configuration sources against the installed release.
Scenario Questions
0-2 years experience
2-5 years experience
5-8 years experience
8+ years experience
- 1Two topics on the same broker have different retention behavior. How would you find the cause? How would you automate and govern this process?
- 2An operator changes a broker setting without a visible effect. How would you check whether it is overridden or requires a restart? How would you recover safely from a partial failure?