Summary
Summary IT Theory - Software
- Course
- Information Technology
- Institution
- 12th Grade
Full summary, according to SAGS document, of IEB Information Technology Theory - Software section.
[Show more]
Content preview
SOFTWARESystem software performs a task for the computer
When comp Switched on UEFI BIOS but better /used modern
systems)
.
=
,
in
↳ BIOS begins POST ↳
supports secure boot COS checked for to check for malware
validity
firmware on ROM conser friendly ,
can book ru n more faster
->
Get of HW from CMOS
inventory ↳
backed HW+ user
battery , non-volatile
memory that stores
settings
↳
Test HWr
↳> BIOS locates MBR
responsible for loading executing
+
OS +Kernel
OS (Operating System) -> provides UI
- loads truns
programs
->
manages resources
-> interface btwn HW+ application programs
:
↳
Types
↳
Desktop OS = MacOS , Windows Linux
,
↳ Mobile OS Android OS iOS limited resources
, uses of smartphone more
efficiently
↳ Embedded OS=> Traffic lights , cars ,
TVs
↳>
Application OS -D stand alone apps Crun wio need to interact w/other Sw , uses HW+OS(
-> network apps (run on multiple computers connected via network)
↳ Kermel core of OS (found in RAM)
->
responsible for I10 requests from SW+ for CPU
translating into instructions
-> handles peripherals
memory +
OS
management
↳
↳ File management -
allows user to delete , move , copy files into
create ,
save,
secondary storage
logical way of saving files
->
of diff .
types
↳ Device (I10 system) management OS controls manipulates HW devices wio user's
knowledge
and minimises time taken to transfer tol from slow devices
↳
Resource management -
manages
HW+ controls all activities taking place in the computer
Memory management
↳ - allocates space to
memory programs
->
S ensures each program has enough memory , no process uses
memory
allocated to another ,
and all diff types of
memory are used efficiently
↳ Process management - OS ensures each process
gets enough
CPU time +
resources +
that CPU
is used efficiently
OS
↳Processing techniques ->
multi-tasking - executes is process simultaneously
->
running at time
-o threads
multi-threading the same
-> executed
by multiple CPUs or
hyperthreading
↳ Scheduler= program in OS that determines which process to process next
The benefits of buying summaries with Stuvia:
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
You can quickly pay through EFT, credit card or Stuvia-credit for the summaries. There is no membership needed.
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 this summary from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller ricciwaksman. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy this summary for R100,00. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
67232 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy summaries for 14 years now