Fidelity Investments Senior Software Engineer Interview Questions and Answers

Zookeeper is used for managing Kafka cluster and maintaining its metadata.

• Zookeeper stores metadata about Kafka brokers, topics, partitions, and consumer groups.

• It helps in leader election and broker failure detection.

• Kafka clients use Zookeeper to discover the current state of the Kafka cluster.

• Zookeeper also helps in maintaining the offset of messages consumed by a consumer group.

OAuth is an open standard for authorization that allows users to share their private resources stored on one site with another site.

• OAuth allows users to grant access to their private resources on one site to another site without sharing their credentials.

• It is commonly used by social media platforms to allow users to sign in to third-party apps using their social media accounts.

• OAuth 2.0 is the most widely used versio...read more