Page 20 - Computer Class 08
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Tasks of Operating System
Recognises and installs peripheral
devices
Handles inputs and Manages files
outputs and folders
Loads and runs
Shares out system
other software
memory
applications
Handles system
errors and alerts
user
Moves data to and Manages system
from the hard disk. security
Allows software to
communicate with
hardware
Classification of an Operating System
8 Time-Sharing : This type of operating system supports multiple user by dividing the CPU
time into slots and defining time slot/slice/quantum in the range of 10 to 100
millisecond for each user per job.
8 Batch Processing : In batch processing, all jobs to be processed are accepted as a group
called a batch and processed together at a pre-defined time slot. For example: Data
transfer and Data Updating in banks.
8 Multiprocessing : This type of an operating system supports more than one CPU at a
time increasing the processing speed.
8 Multitasking : It supports simultaneous execution of multiple tasks. For example: UNIX,
LINUX, Windows 2000.
Computer-8 20
