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You want to build a Kafka Streams application that tracks the latest price of products and also processes every price update event for analytics. Which combination should you use?

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Kafka - Streams

You want to build a Kafka Streams application that tracks the latest price of products and also processes every price update event for analytics. Which combination should you use?

AUse a <code>KTable</code> to keep latest prices and a <code>KStream</code> to process all price update events.

BUse only a <code>KStream</code> for both latest prices and event processing.

CUse only a <code>KTable</code> because it handles both events and state.

DUse a <code>KStream</code> for latest prices and a <code>KTable</code> for event processing.

Step-by-Step Solution

Solution:

Step 1: Identify need for latest state tracking
Tracking latest prices requires a KTable because it maintains the current state per product.
Step 2: Identify need for processing all events
Processing every price update event for analytics requires a KStream to handle all incoming events.
Step 3: Combine both correctly
Use KTable for latest prices and KStream for event processing simultaneously.
Final Answer:
Use a KTable to keep latest prices and a KStream to process all price update events. -> Option A
Quick Check:
KTable = state, KStream = all events [OK]

Quick Trick: Use KTable for state, KStream for event analytics [OK]

Common Mistakes:

MISTAKES

Using only KStream loses latest state
Using only KTable misses event details
Swapping roles of KStream and KTable

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