RTOS Basic Concepts

What is the primary objective of a Real-Time Operating System?

• Minimize power consumption

• Maximize memory utilization

• Maximize CPU utilization

• Ensure timely execution of tasks

Which of the following is not a characteristic of a Real-Time Operating System?

• Predictability

• Responsiveness

• Fault-tolerance

• Dynamic memory allocation

What is the main difference between hard real-time and soft real-time systems?

• Hard real-time systems have stricter timing constraints.

• Soft real-time systems are used for more critical applications.

• Hard real-time systems do not use an operating system.

• Soft real-time systems require real-time clock hardware.

Which scheduling algorithm is commonly used in Real-Time Operating Systems to ensure tasks with higher priority execute first?

• First-Come-First-Served (FCFS)

• Round Robin (RR)

• Earliest Deadline First (EDF)

• Shortest Job Next (SJN)

What is the purpose of a watchdog timer in an RTOS?

• Ensure tasks do not run indefinitely

• Monitor CPU temperature

• Increase the clock frequency

• Enhance memory management

In an RTOS, what is the typical unit used to measure the maximum time required to switch from one task to another?

• Milliseconds

• Microseconds

• Clock cycles

• Context switch

What is a priority inversion in the context of RTOS?

• A situation where a high-priority task waits for a low-priority task to complete.

• A sudden spike in CPU priority during task execution.

• A high-priority task taking more time than expected to complete.

• A task losing its priority due to a context switch.

What does the term "preemption" mean in the context of an RTOS?

• Suspending a task temporarily and resuming it later.

• Assigning a priority to a task during initialization.

• Executing multiple tasks in parallel.

• Forcing a lower-priority task to yield to a higher-priority task.

Which memory management technique is commonly used in Real-Time Operating Systems to allocate fixed-size blocks of memory?

• Paging

• Segmentation

• Virtual memory

• Fixed-size memory pools

What is the maximum interrupt latency in an RTOS system?

• The time taken to process an interrupt service routine (ISR).

• The time between the occurrence of an interrupt and the start of the ISR.

• The time required to switch from one task to another.

• The time taken by a task to execute completely.