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Describe various services provided by operating systems

Describe various services provided by operating systems.

Answers

Chei
Services provided by operating systems.
a) PROGRAM EXECUTION;o.s handles many kinds of activities including user programs and system programs.
Major activities of operating sytems with respect to program execution.
• loads a program into memory .
• executes a program
• handles program execution.
• Provides program synchronization.
• Provides mechanism for process communication.
• Provides mechanism for deadlock handing.

b) I/O OPERATION;an i/o subsystem compromises of i/o devices and their corresponding driver software.
Major activities of operating sytems with respect to I/O operation.
• Drivers hide the peculiarities of specific hardware devices to the user.
• O.s manages the communication between the user and device drivers.
• i/o operation means read or write operation with any file or any specific i/o device.
• O.s provides the access to the required i/o device when required.

C) FILE SYSTEM MANIPULATION ;a file represents a collection of related information .
Note;a file system is a normally organized into directories(folder) for easy navigation.
Major activities of operating systems with respect to file system manipulation
• Programs needs to write and read a file .
• O.s give permission varies from read only,read write,denied and so on.
• O.s provides an interface to the user to create/delete files and directories.
• O.s provides an interface to create the backup of file system.

D)COMMUNICATION;operating systems manages communication between all the processes.
Multiple processes communicate with one another through communication lines known as network
o.s handles rooting and connection strategies and the problem of connection and security.
Major activities of operating systems with respect to communication.
• Transmission of data between communicating processes
• Link communicating processes via computer network.

e)ERROR HANDLING;error can occur anytime and anywhere either in cpu, in i/o devices or in the memory hardware.

Major activities of operating systems with respect to error handing.
• Operating systems constantly checks for possible errors.
• The operating systems take an appropriate action to ensure correct and consistent computing.
F) RESOURCE MANAGEMENT;incase of multi-user or mulititasking environment resources such as main memory ,cpu cycles and file storage are to be allocated to each user or job.

Major activities of operating systems with respect to resource management.
• Operating systems manages all kinds of resources using scheduling algorithm.
• Cpu scheduling algorithms are used for better utilization of cpu.

G)PROTECTION;protection refers to a mechanism or a way to control the access of programs,process or users to the resources defined by a computer system.

Major activities of operating systems with respect to protection.
• Operating systems ensures that all access to systems resources is controlled.
• Ensures that external i/o devices are protected from valid access attempts.
• The o.s provides Authentication features for each user by means of passwords.
Softwaretech answered the question on April 29, 2019 at 11:28

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