Card reader is an example of

A card reader is a data input device that reads data from a card-shaped storage medium. ... Modern card readers are electronic devices that can read plastic cards embedded with either a barcode, magnetic strip, computer chip or another storage medium.

1. What is context switch Mcq?
2. When a context switch is performed which of the following information is stored Mcq?
3. What is Linux an example of?
4. What is context switching in OS with example?
5. Why context switching is overhead?
6. What is operating system Mcq?
7. What causes context switching?
8. Where Linux is used?
9. What is application software with example?
10. What is Linux programming?
11. What is overhead in operating system?
12. What is system calls in operating system?
13. What is process OS?
14. Is known as pure overhead '?
15. What is thread context?
16. What is process context and interrupt context?

What is context switch Mcq?

Answer: 3. In computing, a context switch is the process of storing the state of a process or of a thread, so that it can be restored and execution resumed from the same point later. This allows multiple processes to share a single CPU, and is an essential feature of a multitasking operating system.

When a context switch is performed which of the following information is stored Mcq?

Explanation: When a context switch is performed, the current program or task is interrupted, so the processor's registers are saved in a special table which is known as task control block.

What is Linux an example of?

Linux® is an open source operating system (OS). An operating system is the software that directly manages a system's hardware and resources, like CPU, memory, and storage. The OS sits between applications and hardware and makes the connections between all of your software and the physical resources that do the work.

What is context switching in OS with example?

For example, in the Linux kernel, context switching involves switching registers, stack pointer (it's typical stack-pointer register), program counter, flushing the translation lookaside buffer (TLB) and loading the page table of the next process to run (unless the old process shares the memory with the new).

Why context switching is overhead?

Context Switching leads to an overhead cost because of TLB flushes, sharing the cache between multiple tasks, running the task scheduler etc. Context switching between two threads of the same process is faster than between two different processes as threads have the same virtual memory maps.

What is operating system Mcq?

What is an operating system? Explanation: An Operating System acts as an intermediary between user/user applications/application programs and hardware. It is a program that manages hardware resources. It provides services to application programs.

What causes context switching?

The most common reasons for a context switch are: The time slice has elapsed. A thread with a higher priority has become ready to run. A running thread needs to wait.

Where Linux is used?

Linux is used as an embedded OS for a variety of applications, including household appliances, automotive entertainment systems and network file system appliances. Network OS for routers, switches, domain name system servers, home networking devices and more.

What is application software with example?

An application program (application or app for short) is a computer program designed to carry out a specific task other than one relating to the operation of the computer itself, typically to be used by end-users. Word processors, media players, and accounting software are examples.

What is Linux programming?

Linux, like its predecessor Unix, is an open-source operating system kernel. Since Linux is protected under the GNU Public License, many users have imitated and altered Linux source code. Linux programming is compatible with C++, Perl, Java, and other programming languages.

What is overhead in operating system?

In computers, overhead refers to the processing time required by system software, which includes the operating system and any utility that supports application programs. ... In telecommunications, overhead refers to the processing time required by codes for error checking and control of transmissions.

What is system calls in operating system?

In computing, a system call (commonly abbreviated to syscall) is the programmatic way in which a computer program requests a service from the kernel of the operating system on which it is executed. ... System calls provide an essential interface between a process and the operating system.

What is process OS?

In computing, a process is the instance of a computer program that is being executed by one or many threads. It contains the program code and its activity. Depending on the operating system (OS), a process may be made up of multiple threads of execution that execute instructions concurrently.

Is known as pure overhead '?

This task is known as a context switch. Context-switch time is pure overhead, because the system does no useful work while switching. ... Context switching is overhead because it is cycles (time) that the processor is being used but no user code is executing, so no directly productive computing is getting done.

What is thread context?

The thread context includes all the information the thread needs to seamlessly resume execution, including the thread's set of CPU registers and stack. Multiple threads can run in the context of a process. All threads of a process share its virtual address space.

What is process context and interrupt context?

When executing a interrupt handler or bottom half, the kernel is in interrupt context. Recall That process context is the mode of operation the kernel are in while it's executing on behalf of a process-- For example, executing a system call or running a kernel thread.