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The system does not fail but throws the results (ignores) in case of failure.Compares these data against the stored values.Scheduled time collects data with a sensor within 20 minutes.Measures velocity, height, position, acceleration, air pressure, etc.A difficult time limit is put on a job because late results produced by the job after the deadline can have disastrous consequences.Įxample: Onboard computer of a moving aircraft.If a task does not meet the deadline then the system crashes.There is no frightening consequence of missing one or more time limits.Deadline overruns are tolerable, but not desired.If you very delay then you will not be allowed to appear in the exam.

Exam hall: Delay by 30 minutes allowed.

Here utility value becomes less/drops with time.

Response time overrun leads to disastrous damage.

This System should meet timings constraints.

Now we are going to describe the type of Real-Time System.

Scheduling - Preemptive and Non-Preemptive.

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Computation - Offline (precomputed) and Online (Dynamically).

Requirements of Reliability and fault-tolerant.

Concurrency and Multiprogramming Require.

The Component of RTOS is its kernel - Monolithic & Microkernel.

Temporal correctness: Implies that system must produce output at the correct or right time CPU Architectures & Structure of a Real-Time System Logical correctness: Indicates that the system should produce the correct output (must be verifiable)

Its specification includes logical / temporal correctness.

If a system misses its time limit then the resulting action can be canceled, can continue, depending on the system option.

Avionics, Radar Control System, Industrial Process Control.

Mobile Phones, Digital Camera, Microwave Oven.

In real life situations like controlling a traffic signal or a nuclear reactor or an Aircraft.

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Real-time programming includes assembly coding, priority intercept programming, writing device drivers.Real-time systems operate in a static environment.

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Necessary signaling between interrupt routines and task code is handled by RTS.Real-time computing is equivalent to fast computing.Here the task is completed within a specified time delay.

It responds to inputs immediately(Real-Time).

The ability of the operating system to provide the necessary level of service in a bound response time.

A Deadline is the given time after a event when a response time has completed. In real-time computing, the correctness depends on the time at which the results are produced not only depends upon the logical result. A system that satisfies bounded response time constraint or risk of system failure. What is Real-Time System: Definition of RTSĪ computer system which is the response on the time is known as Real-Time System. In this post we are going to learn about the What is Real-Time System and Types of Real-Time System which is very easily explained below.

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