THE INSTITUTE OF CHARTERED ACCOUNTANTS OF INDIA.(ICAI).
INTRODUCTION TO OPERATING SYSTEM. An operating system ( OS ) is system software that manages computer hardware, software resources, and provides common services for computer programs. An operating system is a program that acts as an interface between the user and the computer hardware and controls the execution of all kinds of programs..
COMPUTER SYSTEM AS USER FRIENDLY: -. Avoids direct dealing with Hardware..
Operating system as resource manager:. The second important objevctive of an os is to manage various resources of computer system . This involves performing such task as keeping track of ‘who is using which resource’ , granting resource request , accounting for resource usage , mediating conflicting request from different programs and users . Resource management includes multiplexing or sharing resources in two different ways: in time and in space. Resources such as CPU time ,memory space , I/O devices , and so on..
Functions of operating system:. Process management. Memory management. File management. Device management. Security Command interpretation..
TYPES OF OPERATING SYSTEM:. REAL TIME OPERATING SYSTEM.
REAL TIME OPERATING SYSTEM(RTOS). This operating system is based on time . That means the process or task should be completed in given time. There are two types of RTOS : 1) HARD RTOS 2) SOFT RTOS.
Rtos Continue…. PREPAID BY NIDHI PITHVA. HARD RTOS :.
RTOS continue…. The long history of video game wars as PlayStation 5 and Xbox Series X go head to head The journey of video games The Economic Times.
DISTRIBUTED OPERATING SYSTEM(DOS). A distributed operating system is system software over a collection of independent software, networked, communicating, and physically separate computational nodes. They handle jobs which are serviced by multiple CPUs. Each individual node holds a specific software subset of the global aggregate operating system..
DISTRIBUTED OPERATING SYSTEM CONTINUE….. PREPAID BY NIDHI PITHVA.
Personal computer operating system. They are widely used for personal use ..
Personal computer operating system continue….. Examples :.
MULTIPROCESSOR OPERATING SYSTEM. Multiprocessor system means, there are more than one processor which work parallel to perform the required operations..
Types of multiprocessing operating system. There are two types :.
Tightly Coupled Multiprocessor System:It is a type of multiprocessing system in which, There is shared memory. In tightly coupled multiprocessor system, data rate is high rather than loosely coupled multiprocessor system. In tightly coupled multiprocessor system, modules are connected through PMIN, IOPIN and ISIN networks..
MULTIPROCESSOR OPERATING SYSTEM CONTINUE…. PREPAID BY NIDHI PITHVA.
SERVER OPERATING SYSTEM. PREPAID BY NIDHI PITHVA.
SERVER OPERATING SYSTEM CONTINUE….. Some common examples of server OSs include:.
EMBEDED OPERATING SYSTEM. systems can be programmable or have a fixed funcThis type of system installed in various gadgets..
Embedded operating system continue…. Examples:. Windows CE.
Smart card operating system. Installed into a small chip and used in Credit card and Debit card for electronic payments..
Smart card operating system continue….. Examples:.
MAIN FRAME OPERATING SYSTEM. It offers three services:-.
MAIN FRAME OPERATING SYSTEM CONTINUE…. Examples:.
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