6: function of os

Question 1

6 main function of OS

Answer 1

• process
• storage
• I/O device
• User Interface
• security
• networks

Question 2

define process management

Answer 2

process is a program in execution
- OS control and schedule for execution by CPU

Question 3

5 stages in process management

Answer 3

1. New
2. running
3. waiting
4. ready
5. terminate

Question 4

4 activities in process management

Answer 4

• process synchronization
• process communication
• creating and deleting process
• suspending and resuming process

Question 5

3 activities in storage management

Answer 5

• allocate and deallocate storage
• keep track of storage in use and free storage
• transfer data between primary and secondary storage

Question 6

3 activities in I/O device management

Answer 6

• tracking the status of each device
• allocating and deallocating device
• schedule tasks for individual device

Question 7

function of User Interface management

Answer 7

• bring structure to interaction between user and computer

Question 8

two common types of UI

Answer 8

• icon based point-to-click (Microsoft)
• keyboard-enter command (UNIX)

Question 9

function of network management

Answer 9

to establish Internet connection

Question 10

function Security management

Answer 10

provide a protecting system to computer system resource such as CPU, memory, disk, software program and data stored in computer
- authentication
- one time password
- program threat
- program attack
- system threat

Question 11

two ways in authentication

Answer 11

• username/password
• user attribute (fingerprint)

Question 12

define program threat

Answer 12

user program ask process to do malicious task
- exp: program installed in computer store and send user credential via network to some hacker

Question 13

define system threat

Answer 13

misuse of system service and network connection

Question 14

program attack

Answer 14

system threat launch program threat on a complete network