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RTOS Task Management

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Questions and Answers

What happens to a task if it exceeds the maximum waiting time for the queue?

It is deleted
It switches back to 'Ready' state (correct)
Its priority is increased
It is blocked indefinitely

What is the recommended approach when queuing items from an ISR?

Queue large items by copy
Queue small items by copy
Queue small items by reference
Store a pointer to the item being queued (correct)

What is the purpose of the pxTaskWoken parameter in xQueueReceiveFromISR?

To indicate the task priority
To indicate the buffer size
To indicate whether a task was unblocked (correct)
To indicate the queue handle

What is the return value of xQueueReceiveFromISR if an item is successfully received from the queue?

pdTRUE (A) Signup and view all the answers

What is the effect of calling vQueueDelete on a queue?

It frees the memory allocated for the queue (D) Signup and view all the answers

What is the function of xQueueSendFromISR?

To post an item into the back of a queue (B) Signup and view all the answers

What is the relationship between task priority and running time in the scheduler?

Tasks with the same priority have equal running time (A) Signup and view all the answers

What happens when a task is waiting for a more priority task to finish?

The task is ready (A) Signup and view all the answers

What is the purpose of the TICK_RATE_HZ constant in FreeRTOSConfig.h?

To determine the time between each clock tick (A) Signup and view all the answers

What is the result of calling vTaskSuspend() on a task?

The task is suspended (A) Signup and view all the answers

What is the purpose of the StackDepth parameter in the xTaskCreate function?

To define the stack size for the task (C) Signup and view all the answers

What happens when a task is preempted by a higher priority task?

The task is blocked (B) Signup and view all the answers

What happens to a task when it is deleted using vTaskDelete?

It is removed from all ready, blocked, and suspended lists (C) Signup and view all the answers

What is the purpose of the idle task in relation to vTaskDelete?

To free the kernel allocated memory from tasks that have been deleted (C) Signup and view all the answers

What happens when a task's priority is set using vTaskPrioritySet?

A context switch will occur only if the priority is higher (B) Signup and view all the answers