[Solved] What happens when two FreeRTOS tasks have the same priority and are both ready to run? — Ans: The scheduler randomly picks one task to run each time. | FreeRTOS

FreeRTOS - Task Scheduling

What happens when two FreeRTOS tasks have the same priority and are both ready to run?

AThe scheduler runs the task that was ready first until it blocks or yields.

BThe scheduler runs both tasks simultaneously on different cores.

CThe scheduler randomly picks one task to run each time.

DThe scheduler ignores one task and runs only the other.

Step-by-Step Solution

Solution:

Step 1: Understand FreeRTOS scheduling for equal priority tasks
FreeRTOS uses time slicing for tasks with the same priority, switching between them in a round-robin fashion when tasks yield or block.
Step 2: Analyze scheduler behavior for same priority tasks
The scheduler switches between tasks of equal priority in a round-robin manner, not running one task exclusively until it blocks.
Final Answer:
The scheduler switches between tasks of equal priority in a round-robin fashion when they are both ready. -> Option C
Quick Check:
Equal priority tasks share CPU time via round-robin = D [OK]

Quick Trick: Same priority tasks share CPU time via round-robin [OK]

Common Mistakes:

Master "Task Scheduling" in FreeRTOS

9 interactive learning modes - each teaches the same concept differently

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