[Solved] Given the following code snippet, what will be printed if the punctuator is scheduled with WALL_CLOCK_TIME every 5 seconds?context.schedule(Duration.ofSeconds(5), PunctuationType.... | Kafka

Kafka - Advanced Stream Processing

Given the following code snippet, what will be printed if the punctuator is scheduled with WALL_CLOCK_TIME every 5 seconds?

context.schedule(Duration.ofSeconds(5), PunctuationType.WALL_CLOCK_TIME, timestamp -> System.out.println("Tick at " + timestamp));

APrints 'Tick at' with the current system time every 5 seconds.

BPrints 'Tick at' with the stream record timestamp every 5 seconds.

CPrints 'Tick at' once immediately and never again.

DThrows a runtime exception due to invalid scheduling.

Step-by-Step Solution

Solution:

Step 1: Understand WALL_CLOCK_TIME punctuator behavior
WALL_CLOCK_TIME triggers punctuators based on system clock time intervals.
Step 2: Analyze the output of the lambda
The lambda prints the timestamp passed, which for WALL_CLOCK_TIME is the current system time.
Final Answer:
Prints 'Tick at' with the current system time every 5 seconds. -> Option A
Quick Check:
WALL_CLOCK_TIME = system time ticks [OK]

Quick Trick: WALL_CLOCK_TIME uses system time, STREAM_TIME uses record time [OK]

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Given the following code snippet, what will be printed if the punctuator is scheduled with WALL_CLOCK_TIME every 5 seconds?