Apache Kafka - Real-time Stream Processing (Master Class) - Implementing Interactive Query Micro-service

The video tutorial explains how to implement an interactive query system using Kafka Streams. It covers setting up RPC endpoints, creating a REST service with Spark Java, and managing Kafka stream states. The tutorial also details building a query server to retrieve data from state stores, handling both local and remote data. Finally, it summarizes the steps and demonstrates the request-response process.

What is the main focus of the interactive query example discussed in the video?

• To create a new application from scratch

• To extend a previous example with interactive query capabilities

• To learn about different programming languages

• To implement a new database system

Which framework is used to create the REST service in the example?

• Spring Boot

• Django

• Flask

• Spark Java

What is the purpose of setting a state listener in the Kafka Streams application?

• To monitor the CPU usage

• To pause the query server when the stream is in an inconsistent state

• To reduce memory usage

• To increase the speed of data processing

What should be done if the Kafka Streams application is not in a healthy state?

• Ignore the state and proceed

• Restart the entire application

• Pause the query server

• Continue running the query server

What is critical when implementing a query server in your application?

• Using a complex algorithm

• Using a high-speed internet connection

• Giving a proper name to the state store

• Having multiple servers

What is the role of the metadata for key method in the query server?

• To encrypt the data

• To delete data from the state store

• To create new keys

• To return host information about the key owner

How does the query server handle requests for data not found in the local state store?

• It forwards the request to the remote host

• It stores the request for later processing

• It deletes the request

• It ignores the request

What is the purpose of the get all values from remote method?

• To retrieve all key-value pairs from the remote store

• To delete all values from the remote store

• To update all values in the remote store

• To create new values in the remote store

What is the first step in adding interactive query capability to a Kafka Streams application?

• Create a new database

• Add a host and port configuration

• Implement a new algorithm

• Delete existing configurations

What tool can be used to test the REST endpoints?

• Google Sheets

• Postman

• Adobe Photoshop

• Microsoft Word