Chapter 2 operating system

How many services does operating system provide ?

• 8

• 7

• 6

• 5

The system must be able to load a program into memory and to run that program, end execution, either normally or abnormally (indicating error)

• Program execution

• I/O operations

• File-system manipulation

• Error detection

A running program may require I/O, which may involve a file or an I/O device

• Program execution

• I/O operations

• File-system manipulation

• Communications

File-system manipulation

• Programs need to read and write files and directories, create and delete them, search them, list file Information, permission management.

• A running program may require I/O, which may involve a file or an I/O device

• The system must be able to load a program into memory and to run that program, end execution, either normally or abnormally (indicating error)

• Processes may exchange information, on the same computer or between computers over a network

Processes may exchange information, on the same computer or between computers over a network

• Communications

• Error detection

• User interface

• Programming execution

Error may occur in the CPU, memory, I/O devices, or in user program

• True

• False

For each type of error, OS should take the ______ action to ensure correct and consistent computing

• same

• appropriate

which is not an OS function exists for ensuring the efficient operation of the system

• Recourse allocation

• Accounting

• Protection and security

• Error detection

When multiple users or multiple jobs running concurrently, resources must be allocated to each of them

• Accounting

• Communications

• Recourse allocation

• Protectoin

To keep track of which users use how much and what kinds of computer resources

• Accounting

• communication

• program execution

• Error detection