Operating sytems services

1. Program execution:

• The operating system Loads program into memory
• It Handles the program’s execution
• It Provides a mechanism for process synchronization
• It Provides a mechanism for process communication

2. I/O operations:

• OS manages the communication between the user and devices drivers.
• I/O operations are the read or write operations which are done with the help of input-output devices.
• Operating system give the access to the I/O devices when it required.

3. File system manipulation:

• The OS gives an access to the program for performing an operation on the file.
• The user can create/delete a file by using an interface provided by the OS.
• The backup of the file system can be created by using an interface provided by the OS.

4. Communication:

• The operating system manages communication between all the processes.

5. Error detection:

• The OS continuously checks for the possible errors.
• The OS takes an appropriate action to correct errors and consistent computing.

6. Resource allocation:

• The OS manages all kinds of resources using schedulers.
• CPU scheduling, Disk scheduling algorithm etc are used for better utilization.

7. Protection:

• The OS ensures that all access to system resources is controlled.
• The OS ensures that external I/O devices are protected from invalid access attempts.
• The OS provides authentication features for each user by means of passwords.