1.2 Role of the OS Flashcards
1
Q
What is the Operating System(OS) ?
A
Software that manages computers, and allows
humans to use them.
1
Q
How does the OS work ? (3 points)
A
- Held in permanent memory
- Loaded by the Basic Input Output System (BIOS)
- Manages the computer’s hardware.
2
Q
What are the 5 roles of the OS ?
A
- Memory management
- Interrupt service routines
- Processor scheduling
- Backing store management
- Peripheral management
3
Q
What is Backing store management ?
A
Allocating and tracking data on secondary
storage.
4
Q
How does Backing store management work ? (2 points)
A
- Allocating addresses in secondary memory.
- Modifying and deleting data in secondary memory.
5
Q
What are Drivers ?
A
Allow a computer system to interact with new hardware.
6
Q
What is Memory Management ?
A
- Allocating
- tracking
- deleting data on primary memory.
7
Q
What is Physical Location ?
A
A register on a hardware device.
8
Q
What is Logical Location ?
A
A position in an algorithm or process.
9
Q
How does Paging work ?
A
- Memory is divided into 4Kb sections.
- Processes can be stored across several pages.
- Pages can be loaded / dumped as needed.
10
Q
What is Segmentation
A
Dividing memory logically according to program needs.
11
Q
How does Segmentation work ?
A
- Memory is divided into sections of variable length.
- Sections can be loaded individually.
