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#Describe the purpose and processing of captcha software code#

While in the User Mode, the CPU executes the processes that are given by the user in the User Space. For example, memory management should be done in Kernel-Mode only. So, the CPU executes these instructions in the Kernel Mode only.

There are certain instructions that need to be executed by Kernel only. So, the allocation of these devices is managed by the Kernel.

Device Management: The peripheral devices connected in the system are used by the processes.

All these memory management is done by a Kernel. So, memory must be allocated and deallocated for its execution.

Memory Management: Every process needs some memory space.

Resource Management: It is the duty of a Kernel to share the resources between various process in such a way that there is uniform access to the resources by every process.

It acts as a bridge between the user and the resources of the system.

Access Computer resource: A Kernel can access various computer resources like the CPU, I/O devices and other resources.

As these are two different spaces in the memory, so communication between them is a bit slower. Apart from this, the memory used by other applications is called the User Space.

#Describe the purpose and processing of captcha software code#

So, the code of the Kernel is loaded into this protected Kernel Space. When a process makes a request to the Kernel, then it is called System Call.Ī Kernel is provided with a protected Kernel Space which is a separate area of memory and this area is not accessible by other application programs. It provides an interface between the user and the hardware components of the system. The Kernel is responsible for low-level tasks such as disk management, memory management, task management, etc. The Kernel remains in the memory until the Operating System is shut-down. Whenever a system starts, the Kernel is the first program that is loaded after the bootloader because the Kernel has to handle the rest of the thing of the system for the Operating System. It is the most important part of an Operating System. Since the Operating System has control over the system so, the Kernel also has control over everything in the system. A Kernel is a computer program that is the heart and core of an Operating System.