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OS 1 - Coggle Diagram
OS 1
OS Services
User interface
Program execution
I/O Ops
File system manipulation
Communication
Error handling
Resource management
Protection
Types of OS
Batch operating system
Notes OS a Concept based approach Page 52
C Lack of ineraction
C CPU is often idle
C Difficult to provide desired priority
Time sharing OS
Scheduling
Multiprogramming
Quick response
Less CPU Idle time
C Problem of reliability
C Question of security
C Problem of data communication
Distributed operating system
Reduction of load
Reduction of delay
Better services
Spped up the exchange of data via email
Resource sharing facility
Network operating systems
Examples
Mac OS X
Microsoft windows server 2003 , 2008
Novell Netware
Stable
Secured
Easy integrations of updates
C High cost of buying
C Dependency on server
C Regular maintainence is required
Real time OS
Hard real time
Soft real time
OS Concepts
Process
Address types
2
32 to 2
64 bytes sized address spaces
If address spaces exceed the Main memory then virtual memory takes over
Files
I/O
Protection
System call types
Process control
File manipulation / Management
Device management
Information management
Communication
Introduction to system call
OS concepts Page 62
Usage of APIs
Portability
Ease of use
Introduction
OS Operations