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Operating System Kernal - The kernel is the essential center of a computer operating system, the core that provides basic services for all other parts....
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Operating System - A command interpreter is the part of a computer operating system that understands and executes commands that are entered....
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Operating System daemon - In Unix and some other operating systems, a daemon is a computer program that runs in the background, It is not under the direct control of a user.......
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Operating System process management - The basic functions of the OS wrt the process management are : Allocating resources to processes,.....
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Operating System named pipe- Its a pipe that an application opens by name in order to write data into or read data from the pipe. ...
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In non-preemptive scheduling, a running task is executed till completion. It cannot be interrupted......
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Operating System semaphore - A semaphore is a variable. There are 2 types of semaphores:Binary semaphores, Counting semaphores.....
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Operating System mutex - A mutex and the binary semaphore are essentially the same. Both can take values: 0 or 1. However, there is a significant difference...
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Operating System memory types - Cache Memory - This is a small amounts of memory used to speed up system performance.....
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Operating System virtual memory - Virtual memory is an approach to make use of the secondary storage devices as an extension of the primary storage of the computer......
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What is RTOS? - A certain capability within a specified time constraint is guaranteed by an operating system called ‘real time operating system’.
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Hard real-time and soft real-time - Critical task completion on time is guaranteed by a hard real time system.
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Type of scheduling in RTOS - The tasks of real time operating system have 3 states namely, ‘running’, ’ready’, ‘blocked’.
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What is interrupt latency? - The time between a device that generates an interrupt and the servicing of the device
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What is priority inheritance? - Priority inversion problems are eliminated by using a method called priority inheritance.
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What is spin lock? - In a loop a thread waits simply (‘spins’) checks repeatedly until the lock becomes available.
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An operating system is an interface between hardware and software. OS is responsible for managing and co-ordinating the activities of a computer system.......
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OS performs an operation for storing and retrieving data from secondary storage devices for use in main memory........
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A program is a set of instructions that are to perform a designated task, where as the process is an operation........
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Physical memory is the only memory that is directly accessible to the CPU.......
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Sockets: Socket is a part of OSI layer model. Communication among different layers is performed through sockets......
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A program in execution is known as ‘process’. A program can have any number of processes. Every process has its own address space........
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RAM: - Volatile memory - Electricity needs to flow continuously - Program information is stored in RAM.......
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DRAM – Dynamic Random Access Memory. One of the read / write memory. DRAM is cheap and does the given task.......
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Cache memory is RAM. The most recently processing data is stored in cache memory. CPU can access this data more quickly than it can access data in RAM.......
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The program syntax is checked by the compiler; where as the keywords of the program is checked by the interpreter......
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Job scheduling is an activity for deciding the time for a process to receive the resources they request. First Come First Served: In this scheduling, the job that is waiting for a long time is served next........
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Real-time system is the study of hardware and software, which are subject to the operational deadlines from event to the system response......
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Dead lock is a situation of two or more processes waiting for each other to finish their tasks. In this situation no progress or no advancement is made.......
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Primary memory storages are temporary; where as the secondary storage is permanent.......
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