WIF3008 Pop Quiz Lecture 4: RTOS

Which of the following scheduling types is primarily used in hard real-time systems where tasks must execute at specific intervals?

• Cooperative Scheduling

• Round Robin Scheduling

• Clock-Driven Scheduling

• Priority-Based Scheduling

Which approach does an Event-Driven Scheduling system use to handle task execution?

• Time intervals

• Task dependencies

• Task priority levels and triggers

• FIFO queue processing

In a Priority-Based Preemptive Scheduling system, a low-priority task is interrupted by:

• A higher-priority task

• A task of the same priority level

• Any other task

• Only when the task completes execution

In Rate Monotonic Scheduling (RMS), tasks with which characteristic are assigned higher priority?

• Tasks with longer execution time.

• Tasks with shorter periods.

• Tasks with lower priority numbers.

• Tasks with shorter deadlines.

Priority Inversion occurs in RTOS when:

• A lower-priority task preempts a higher-priority task.

•  A high-priority task waits on a resource held by a lower-priority task.

• Tasks are executed in reverse order of their priorities.

• Tasks with no priority are executed before prioritized tasks.

Priority Inheritance Protocol is used in RTOS to:

• Prevent deadlock by ensuring tasks complete on time.

• Allow lower-priority tasks to inherit the priority of a high-priority task waiting on a shared resource.

• Avoid task starvation by lowering the priority of high-priority tasks.

• Increase the CPU usage by creating additional tasks.

Chain Blocking in RTOS refers to:

• A situation where multiple tasks are waiting on a single resource.

• A low-priority task causing delays for multiple high-priority tasks due to dependency on shared resources.

• A single task repeatedly blocking itself.

• Tasks being blocked in reverse order of their priorities.