Operating System Components :

introduction:

This part is very big issue of operating system all information here supports you to really work on environment of operating system.

These components reflect the services made available by the O.S.

1.     Process Management 

•  Process is a program in execution numerous processes to choose from in a multiprogrammed system, 

•  Process creation/deletion (bookkeeping) 

• Process suspension/resumption (scheduling, system vs. user) 

•   Process synchronization 

•   Process communication

•   Deadlock handling

2. Memory Management 

•    Maintain bookkeeping information 

•    Map processes to memory locations

•     Allocate/deallocate memory space as requested/required

3. I/O Device Management 

• Disk management functions such as free space management, storage allocation, fragmentation removal, head scheduling .

• Consistent, convenient software to I/O device interface through buffering/caching, custom drivers for each device.

4. File System

Built on top of disk management

•   File creation/deletion.
•    Support for hierarchical file systems 
•    Update/retrieval operations: read, write, append, seek
•    Mapping of files to secondary storage

5. Protection

Controlling access to the system

•    Resources --- CPU cycles, memory, files, devices
•    Users --- authentication, communication 
•    Mechanisms, not policies

6. Network Management

Often built on top of file system

•  TCP/IP, IPX, IPng
•    Connection/Routing strategies 
•     ``Circuit'' management --- circuit, message, packet switching
•     Communication mechanism
•    Data/Process migration

7. Network Services (Distributed Computing)

Built on top of networking

•  Email, messaging (GroupWise)
•  FTP
•  gopher, www
•   Distributed file systems --- NFS, AFS, LAN Manager
• Name service --- DNS, YP, NIS
•  Replication --- gossip, ISIS
•   Security --- kerberos

8. User Interface

•    Character-Oriented shell --- sh, csh, command.com ( User replaceable)
•   GUI --- X, Windows 95

This video learn you relation between operating system and hardware.

Question and answer

- What is the name given to the organized collection of software that controls the overall operation of a computer?

A.) Controlling system

B.) Peripheral system

C.) Operating system

D.) Working system

Correct Answer :  C

Now in your comments box down the code you must write five sentences about what did yuo learned With writing  yourname and academic number