Which of the following serves real-time applications without buffer delays?
A real-time operating system is a type of OS that serves real-time applications and processes data without buffer delay. This time-bound system has fixed time constraints and calculates processing time requirements in tenths of seconds increments of time. To avoid system failure, processing should be done within the specified constraints. We use RTOS in industrial control, flight control, and real-time simulations. Show
Why use Real Time Operating System?Following are the reasons we should use RTOS:
Components of RTOSFollowing are the components of Real Time Operating System: 1. The Scheduler: Tells the order in which tasks should be executed. This order is generally based on priority. 2. Symmetric Multiprocessing (SMP): These are various multiple tasks that the RTOS handles in order to perform parallel processing. 3. Function Library: It acts as an interface and helps connect the kernel to the application code. This allows the user to send requests to the Kernel using a function library and gives the application the desired results. 4. Memory Management: It allocates memory to every program. 5. Fast dispatch latency: The interval between the termination of a task that is identified by the OS and the actual time taken by the thread that has started processing in the ready queue. 6. User-defined data objects and classes: The programming languages like C or C++ used by the RTOS should be organized according to their operation. Types of RTOSFollowing are the three types of RTOS systems: 1. Hard Real-Time:This type handles deadlines very strictly. Thus, the given task must start and finish execution within the assigned time duration. Example: Medical critical care system and aircraft systems. 2. Firm Real-Time:This type needs to follow deadlines though one or two missing deadlines would not have a big impact they could still cause undesired effects. These effects include a huge reduction in the quality of a product. Example: Multimedia applications. 3. Soft Real-Time:This type handles delays by the OS softly. Though there is a deadline assigned for a specific job, a little delay is acceptable. Example: Livestock price quotation system. Terms in RTOSFollowing are some important terms used in RTOS:
Features of RTOSSome important features of RTOS:
Factors to select an Real-Time Operating SystemSome essential factors for selecting RTOS are:
Difference between GPOS and RTOSGeneral-Purpose Operating SystemReal-Time Operating SystemUnnoticed priority inversionNo predictability guaranteesKernel’s operation may/may not be preemptedKernel’s operation can be preemptedFor desktop PC and laptopFor embedded applicationProcess-based SchedulingTime-based schedulingInterrupt latency is not importantInterrupt lag is minimalNo priority inversion mechanismPriority inversion mechanism cannot modify by the systemApplications of Real Time Operating SystemFollowing are the applications of RTOS:
Disadvantages of Real Time Operating SystemFollowing are the disadvantages of using RTOS:
SummaryRTOS is an OS that serves real-time applications and processes data without buffer delay. Some important components of the RTOS system are: Scheduler, Symmetric Multiprocessing, Function Library, Memory Management, Fast dispatch latency, and User-defined data objects and classes. There are three types of RTOS, namely, Hard time, Soft time, and Firm time. Its biggest drawback is that it only concentrates on a few tasks. Which of the following is an open source hardware and software company that designs and manufactures single board microcontrollers as well as kits to?Arduino (/ɑːrˈdwiːnoʊ/) is an open-source hardware and software company, project, and user community that designs and manufactures single-board microcontrollers and microcontroller kits for building digital devices.
Which of the following is a secure alternative to FTP that uses SSL for encryption?SFTP. The first FTP alternative is SFTP, or Secure File Transfer protocol, which uses SSH encryption to transfer files and allows organizations to securely share information with outside partners.
Which of the following cloud computing solutions delivers software applications to a client either over the internet or on a local area network?SaaS. SaaS is a distribution model that delivers software applications over the internet; these applications are often called web services. Users can access SaaS applications and services from any location using a computer or mobile device that has internet access.
Which of the following is an exploit in which malware allows the virtual OS to interact directly with the hypervisor?Virtual machine escape is an exploit in which the attacker runs code on a VM that allows an operating system running within it to break out and interact directly with the hypervisor. Such an exploit could give the attacker access to the host operating system and all other virtual machines (VMs) running on that host.
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