Bare-metal vs RTOS execution model in Embedded C - Interactive Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to define the main loop in a bare-metal system.

Embedded C

int main() {
    while([1]) {
        // main loop code
    }
    return 0;
}

Drag options to blanks, or click blank then click option'

A1

B0

Ctrue

Dfalse

Attempts:

3 left

💡 Hint

Common Mistakes

Using 0 or false causes the loop to never run.

Using variables that might change and stop the loop.

In bare-metal programming, the main loop runs indefinitely, so the condition should always be true. Using 1 ensures the loop never ends.

2fill in blank

medium

Complete the code to create a task function prototype for an RTOS.

Embedded C

void [1](void *params) {
    while(1) {
        // task code
    }
}

Drag options to blanks, or click blank then click option'

Atask_function

BTaskFunction

CTask1

Dmain

Attempts:

3 left

💡 Hint

Common Mistakes

Using main as a task function name.

Using names with uppercase letters that don't match style.

Task functions in RTOS often use lowercase and underscore naming. task_function is a clear, valid prototype name.

3fill in blank

hard

Fix the error in the RTOS task creation code by filling the blank.

Embedded C

xTaskCreate([1], "Task1", 100, NULL, 1, NULL);

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ATask1

Btask_function

Cmain

Dvoid

Attempts:

3 left

💡 Hint

Common Mistakes

Passing the task name string instead of the function.

Passing void which is not a function.

The first argument to xTaskCreate must be the task function name. task_function is the correct function to run.

4fill in blank

hard

Fill both blanks to create a dictionary comprehension that maps task names to their priorities if priority is greater than 2.

Embedded C

task_priorities = {name: [1] for name, [2] in tasks.items() if priority > 2}

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Apriority

Cprio

Dtask

Attempts:

3 left

💡 Hint

Common Mistakes

Using inconsistent variable names for priority.

Using undefined variables like prio or task.

The dictionary comprehension maps each task name to its priority. The variable priority is used both in the value and in the loop unpacking.

5fill in blank

hard

Fill all three blanks to filter and map tasks with priority above 3 to their uppercase names and priorities.

Embedded C

filtered_tasks = [1]([2].upper(): [3] for [2], priority in tasks.items() if priority > 3)

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Adict

Bname

Cpriority

Dtasks

Attempts:

3 left

💡 Hint

Common Mistakes

Using tasks instead of dict.

Mixing variable names in keys and values.

The code creates a dictionary from a comprehension. It uses name for keys (converted to uppercase) and priority for values.