100% satisfaction guarantee Immediately available after payment Both online and in PDF No strings attached
logo-home
Summary 9618 Chapter 5: System Software £3.49   Add to cart

Summary

Summary 9618 Chapter 5: System Software

 6 views  0 purchase

Chapter 5- paper 1 9618 Computer Science

Preview 2 out of 6  pages

  • No
  • Chapter 5: system software
  • September 10, 2024
  • 6
  • 2022/2023
  • Summary
book image

Book Title:

Author(s):

  • Edition:
  • ISBN:
  • Edition:
All documents for this subject (7)
avatar-seller
siennathompson1
5 System Software
System Software. https://drive.google.com/file/d/1zxVmXvfuviupJE9XzY9-sF3_T8UC5atf/view?
usp=drivesdk
pdf



5.1

What is an OS?
A software platform that provides facilities for programs to be run which
are of benefit to a user.
An operating system is a low-level piece of software that manages the
computer’s hardware & software, and provides an interface between the
user and the computer. The operating system is the software that
controls, manages and runs all of the applications on the computer.



Explain why a computer system requires an OS
The computer hardware is unusable without an OS
… because it provides the visual user interface

… which allows the user to communicate with the computer system.



Explain the key management tasks carried out by the OS : Memory
management

Memory management
There are two broad tasks to be accomplished when managing
memory :

1. Each process must have enough memory to execute, and it can
neither run into the memory space of another process nor be
run into by another process (fair memory allocation)

a. Ensuring that different processes cannot access the same
memory location at the same time

b. Managing virtual memory and page files




5 System Software 1

, 2. Different types of memory in the system must be used properly
so that each process can run most effectively.

a. Allocating memory locations to processes that are running
on the computer



File management
The operating system is responsible for maintaining the file system.
The tasks include:

1. File naming conventions

2. Directory (folder) structures

3. Access control mechanisms

This is done through:

1. Find, move, edit and delete files

2. Inspect files to find out their properties (e.g. creation date, size,
type)

3. Organise files into a series of folders and sub-folders

4. View directory trees

5. Formatting disks



Security management

Part of the role of the operating system is to manage security of the
devices, file system and memory. The management includes:

1. Provision for recovery when data is lost (backup)

2. Prevention of intrusion (user accounts)

3. Ensuring data privacy

This is done by :

1. Denying write access to protected files and folders (access
rights)

2. Scanning memory and hard drives to ensure file integrity




5 System Software 2

The benefits of buying summaries with Stuvia:

Guaranteed quality through customer reviews

Guaranteed quality through customer reviews

Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.

Quick and easy check-out

Quick and easy check-out

You can quickly pay through credit card for the summaries. There is no membership needed.

Focus on what matters

Focus on what matters

Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!

Frequently asked questions

What do I get when I buy this document?

You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.

Satisfaction guarantee: how does it work?

Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.

Who am I buying these notes from?

Stuvia is a marketplace, so you are not buying this document from us, but from seller siennathompson1. Stuvia facilitates payment to the seller.

Will I be stuck with a subscription?

No, you only buy these notes for £3.49. You're not tied to anything after your purchase.

Can Stuvia be trusted?

4.6 stars on Google & Trustpilot (+1000 reviews)

80461 documents were sold in the last 30 days

Founded in 2010, the go-to place to buy revision notes and other study material for 14 years now

Start selling
£3.49
  • (0)
  Add to cart