Embedded C Programming, End Term

January 2025 term, 13 Apr 2025, Set QEF1

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Question 1

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Select one option

• A.

  The sender task will be blocked permanently

• B.

  The queue will eventually be full, and the sender task will be blocked until space is available

• C.

  The queue will clear automatically, allowing the sender to continue

• D.

  The system will crash due to queue overflow

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Figure from the original question paper Consider a finite state machine (FSM) controlling a **motor speed system** with a single button. The states and events are defined as follows:\ **States:**\ 1\. **STATE\_STOPPED** – Motor is off.\ 2\. **STATE\_SLOW** – Motor runs at slow speed.\ 3\. **STATE\_FAST** – Motor runs at fast speed.\ 4\. **STATE\_OVERSPEED** – Motor runs at an unsafe speed.\ **Events:**\ 1\. **EVENT\_BUTTON\_PRESS** – Button is pressed.\ 2\. **EVENT\_SENSOR\_ALERT** – A sensor detects overspeed. Figure from the original question paper If the initial state is **STATE\_SLOW,** what will be the next state after one **EVENT\_BUTTON\_PRESS** and one **EVENT\_SENSOR\_ALERT** event? What is the main issue caused by priority inversion in an RTOS?