RTP

A visually engaging illustration depicting embedded systems, real-time processing, and task scheduling, incorporating elements like clocks, processors, and digital interfaces.

RTP Embedded Systems Quiz

Test your knowledge on Real-Time Processing (RTP) in embedded systems! This quiz covers various aspects of concurrency, task scheduling, and real-time operating systems that are essential for understanding how embedded systems function.

Each question is designed to challenge your understanding and reinforce key concepts. Get ready to dive into topics such as:

Advantages of concurrency
Atomic operations
Real-time scheduling algorithms
Deadlock conditions

13 Questions3 MinutesCreated by CodingGuru247

Which one is an advantage of concurrency in embedded systems?

Debugging is easier

No need to share resources

Easier to develop real-time systems

Decrease reaction time to physical environment

Which one of the following describes executing tasks of an embedded system in a Monolithic way?

The tasks execute concurrently

The tasks can not share any resources

There is one program in which tasks execute sequentially

Monolithic execution is not an appropriate way of executing tasks for any embedded systems

What is an atomic operation?

An operation that must be executed before the deadline of a task

Every statement in a real-time task is an atomic operation

An operation that from system's point of view is not divisible into more operations

An operation that contains only one variable

An operation that contains only one operator

Which answer is correct about the following figure?

When task1 arrives, it starts executing because task2 has finished its job

When task1 arrives it inherits the priority level of task2 and starts executing

When task1 arrives it preempts task2 because it has a higher priority than task2

When task1 arrives, it starts executing because task2 has a longer execution time

When task1 arrives, it starts executing because task1 has a shorter execution time

Assume in a system there exist 2 tasks and 2 mutual exclusive resources. Both tasks share both resources. In which one of the following cases there is a risk where the tasks can end up in a deadlock?

The tasks are preemptive and both tasks use both resources in nested critical sections

The tasks are non-preemptive and they use both resources in non-nested critical sections

The tasks are preemptive and they use the same resource in non nested critical sections

The tasks are non-preemptive and both tasks use both resources in nested critical sections

Which one of the following statements is correct?

A task cannot have access to more than 1 mutually exclusive resource

The best way to protect a mutually exclusive resource is to use a counting semaphore

A task cannot have access to 2 mutually exclusive resources in nested critical sections

A mutually exclusive resource cannot be accessed by more than 1 task at the same time

A mutually exclusive resource can be accessed by at most 2 tasks at the same time

Which answer is correct about "Cross-Platform Development"?

A cross-compiler is needed on the host system

A cross-compiler is needed on the target system

A program is written on a target system and it will be running on a host system

The host system and the target system must always be the same

Which one of the following facilities is NOT necessary to be provided by a RealTime Operating System (RTOS)?

Clock

Delaying execution of tasks

File management system

Task management

When is a task in the "Running" state?

When the task is in the ready queue but there is another higher priority task running on the processor

When the task has the highest priority but it is blocked by a lower priority task

When the task is executing on the processor

When the task is waiting for a recourse to be available

What is the maximum response time of a real-time task?

The maximum time that the task executes on the processor

The maximum time from the time that the task arrives until it finishes its work

The maximum time that the task waits in the ready queue

The maximum time that the task is blocked by a lower priority task

For a periodic and preemp�ve task set which one is correct about Earliest Deadline Firs (EDF) scheduling algorithms?

If EDF fails to schedule the task set, no other hypothetically optimal scheduling algorithm will be able to schedule the task set.

EDF is a static scheduling algorithm where priorities are statically assigned to the tasks.

EDF is not optimal.

EDF is an offline scheduling algorithm. This means based on the deadlines of the tasks, the priorities are assigned to the tasks offline (before running the program)

Under EDF a task can not be preempted by another task immediately and it continues until it finishes its job.

For a periodic and preemp�ve task set which one describes Rate Monotonic Scheduling (RMS) algorithm?

Assign priorities to tasks according to their arrival rate; the longer the period of a task is the higher its priority will be.

Assign priorities to tasks according to their arrival rate; the shorter the period of a task is the higher its priority will be.

When a task with a longer period arrives the running task with shorter period inherits its priority.

When a task with a shorter period arrives the running task with longer period inherits its priority.

Which one is correct about an Event driven scheduling algorithm?

Scheduling decisions are triggered based on system time.

Arrival times of tasks are known in advance.

Scheduling decisions are triggered based on arrival of events.

Arrival times of external events are known in advance.

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