Answer these questions based on DesktopBSD Operating System 1) What is the kerne

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Hardware requirements?

1. Minimum hardware your computer want to run a program and to work properly.
2. In order to utilize a given peripheral a computer need a minimum amount of RAM, Disk, Ports and DVD Drive.

Overall Size

1. Overall size means size of hard disk.
2. Total size of hard disk define the overall size of the computer.
3. For example 1 TB, 2 TB

Kernel Structure:

1. It is the core component of Operating system.

2. It acts like a interface between OS and hardware.

3. Main tasks of kernel are

a. I/O communcation

b. Device Manangement

c. Memory management

d. Process Management.

Virtual Memory:

1. Virtual memory is a memory capability of OS.
2. It uses hardware and software to compensatate RAM shortage by temporarily tranferring the data between RAM and Disk.
3. It is idea of using disk to extend RAM.

Process:
1. Process is an instance of program execution.
2. It means when we open two applications then OS will use two processes Even though it is same program.
3. Process is heavy weight and resource intensive
4. In multiple processing environments, each process execute same code but has its own memory.

Thread:

1. It is a process that execute different parts of the program.
2. It execute sam parts of the code at the same time but different execution state.
3. Thread is light weight and take lesser resources than a process.
4. All thread share same set of open files and child processes

Mode of operations:

They are two different mode of operations.

1. Kernel mode
2. User mode

1. OS will runs in kernel mode. It has complete access to all hardware components and control swiching between CPU.
2. The rest of the software runs in user mode

Application Compatibility

1. Application compatibility means software what we downloaded should have compatibility between OS and Hardware.
2. If their no compatibility they will be abnormal Situation where OS will crash.

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