What will happen if a producer task tries to send data to a full queue with zero block time in FreeRTOS?

medium📝 Predict Output Q5 of 15

FreeRTOS - Design Patterns for RTOS

AThe data is lost and the function returns immediately with failure

BThe producer task blocks until space is available

CThe queue overwrites the oldest data automatically

DThe system crashes due to overflow

Step-by-Step Solution

Solution:

Step 1: Understand queue send behavior with zero block time
If the queue is full and block time is zero, xQueueSend() returns immediately with failure.
Step 2: Confirm no blocking or overwriting occurs
FreeRTOS queues do not overwrite data or crash on full queue with zero block time.
Final Answer:
The data is lost and the function returns immediately with failure -> Option A
Quick Check:
Zero block time + full queue = immediate failure [OK]

Quick Trick: Zero block time means no waiting; send fails if full [OK]

Common Mistakes:

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