Associate Principal Engineer Interview Questions and Answers

To prevent a docker container from assuming root user role, use non-root users, drop privileges, and utilize user namespaces.

• Create a non-root user in the Dockerfile with appropriate permissions

• Use the USER instruction in the Dockerfile to switch to the non-root user

• Utilize user namespaces to map the container's root user to a non-root user on the host system

• Drop privileges within the container to limit the capabilities of the processes running inside

Java Streams API uses fail-fast iterator

• Java Streams API uses fail-fast iterator, which throws ConcurrentModificationException if the collection is modified while iterating

• Fail-fast iterators immediately throw an exception if the collection is modified during iteration

• This behavior helps in detecting and preventing concurrent modification issues

Kafka is a distributed streaming platform while RabbitMQ is a message broker.

• Kafka is designed for high-throughput, fault-tolerant, real-time data processing.

• RabbitMQ is a traditional message broker that follows the AMQP protocol.

• Kafka uses a publish-subscribe model while RabbitMQ uses a message queue model.

• Kafka is horizontally scalable and provides strong durability guarantees.

• RabbitMQ supports multiple messaging protocols and has more features for message routing and deliv...read more

Various tools were used in the project including JIRA, Git, Jenkins, and Docker.

• JIRA for project management and issue tracking

• Git for version control and collaboration

• Jenkins for continuous integration and deployment

• Docker for containerization and deployment