operating systems

Question 1

operating system

Answer 1

provide an interface between the user and the hardware, allowing the user to interact with the system and run applications

Question 2

Resource management

Answer 2

They allocate resources (eg cpu) to specific tasks and ensure that they are used effectively
e.g. when a user opens multiple applications simultaneously, the operating system decides:
- How much memory to allocate to each application
- When and for how long each gets to use the CPU
- How to handle data being read from or written to the hard drive.

Question 3

File management

Answer 3

• Operating systems handle the storage, retrieval, and manipulation of data files
• When working with files, operating systems provide a GUI of the file system that allows a user to decide which directory a file should be saved in and what the file name will be

Question 4

Interrupt handling

Answer 4

Interrupt events require the immediate attention of the CPU
to maintain the smooth running of the system, interrupts need to be handled and processed in a timely manner

User clicks cancel→mouse sends signal→CPU interrupted→OS cancels process

Question 5

Security

Answer 5

provide various security features such as password-protected system accounts, a firewall, virus scanning and file encryption
Password-protected system accounts are a very common feature in operating systems

Question 6

Providing a platform for software to run

Answer 6

OS provides a platform on which application software can run, this is mainly by allowing software access to system resources
e.g. if a computer game has intensive graphics and online play, the operating system will grant it access to the GPU and the network card

Question 7

Providing a user interface

Answer 7

provides interaction through 2 ways: GUI and CLI
GUI = used for interaction and touch
CLI = text-based through a command-line interface. used for programmers