You want to build a real-time dashboard that shows the current count of active users using Kafka Streams interactive queries. Which approach best fits this requirement?

hard📝 Application Q15 of 15

Kafka - Advanced Stream Processing

AWrite user statuses to a separate database and query it periodically

BStore counts in a local variable updated by Kafka Streams processors

CUse Kafka consumer to read all user status events and aggregate externally

DUse a <code>ReadOnlyKeyValueStore</code> to store user statuses and query counts live

Step-by-Step Solution

Solution:

Step 1: Identify real-time state storage method
Kafka Streams state stores hold live data accessible via interactive queries.
Step 2: Choose best approach for live dashboard
Using ReadOnlyKeyValueStore allows querying current counts directly without extra DB.
Final Answer:
Use a ReadOnlyKeyValueStore to store user statuses and query counts live -> Option D
Quick Check:
Interactive queries + state store = real-time dashboard [OK]

Quick Trick: Use state store with interactive queries for live data [OK]

Common Mistakes:

MISTAKES

Relying on external DB instead of state store
Polling Kafka consumer instead of querying store
Using local variables which are not shared state

Master "Advanced Stream Processing" in Kafka

9 interactive learning modes - each teaches the same concept differently

Learn Why Deep Visual Try Challenge Project Recall Time

Want More Practice?

15+ quiz questions · All difficulty levels · Free

Free Signup - Practice All Questions

More Kafka Quizzes

You want to build a real-time dashboard that shows the current count of active users using Kafka Streams interactive queries. Which approach best fits this requirement?

Step 1: Identify real-time state storage method

Step 2: Choose best approach for live dashboard

Final Answer:

Quick Check:

Want More Practice?