[Solved] What is wrong with this code snippet?TaskHandle_t xTask; vTaskPrioritySet(xTask, -1); — Ans: Priority cannot be negative; this causes an error | FreeRTOS

FreeRTOS - Task Priorities

What is wrong with this code snippet?

TaskHandle_t xTask;
vTaskPrioritySet(xTask, -1);

ACode is correct and will set priority to -1

BTask handle is not initialized

CPriority cannot be negative; this causes an error

DvTaskPrioritySet requires a delay parameter

Step-by-Step Solution

Solution:

Step 1: Check task handle initialization
TaskHandle_t xTask; is declared but not initialized (e.g., via xTaskCreate which sets the handle).
Step 2: Consequence of uninitialized handle
Passing uninitialized (garbage) handle causes undefined behavior or crash.
Step 3: Check priority value
Priority cannot be negative; passing -1 is invalid and causes error.
Final Answer:
Priority cannot be negative; this causes an error -> Option C
Quick Check:
Priority must be non-negative [OK]

Quick Trick: Priority values must be zero or positive [OK]

Common Mistakes:

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What is wrong with this code snippet?