MOD 4 Flashcards
manages the basic operations of the computer.
These operations are: booting, housekeeping tasks, user interface, managing
computer resources, managing files, and managing tasks,
operating system (OS)
Functions of an operating system
Ø Booting
Ø Housekeeping tasks
Ø User Interface
Ø Managing computer resources
Ø Managing files
Ø Managing tasks
The process of getting the operating system to start in the computer’s main
memory
Booting
BIOS
basic-input-output-system
Boot Process
Power ON
BIOS
POST
BIOS Boot Sequence
MBR
POST
Power On Self Test
MBR
Master Boot Record
tasks include formatting, or initializing, which means preparing
a disk electronically so it can store data or programs. Others include file and
folder management tasks such as copying or moving of files from one disk to
another, erasing or removing disk files that are no longer useful, renaming of
files on disk, and creating folders.
Housekeeping
e is the shell or the part of the operating system that user’s see
on the computer’s display screen that allows him/her to communicate, or
interact, with the system
User Interface
3 types of interface
Command-driven
Menu-drive
Graphical User Interface
requires users to enter a command by
typing in codes or words at the cursor position following a prompt on
the display screen.
command-driven interface
allows users to choose a command from a
menu.
menu-driven interface
Two types of menu
menu bar
pull-down menu
The easiest interface to use utilizes images and icons to represent the
commands, options, or functions in the computer.
graphical-user interface
GUI
graphical-user interface
This is performed by the supervisor, the central component of the
operating system. The supervisor resides in main memory while the
computer is on and directs other programs to perform tasks to support
applications programs.
managing computer resources.
s is another important task of the operating system. Since files
of data and programs are located in many places in the hard disk and other
secondary-storage devices, when the user moves, renames, or deletes a file,
the operating system manages such changes and helps him locate and gain
access to it. In performing file management, the operating system also makes
directories (or folders) of files. These lists or indexes include the file names,
their sizes (in bytes), and the dates and times they were created
Managing Files
g is the execution of two or more
programs by one user concurrently on the same computer with one
central processor.
Multitasking or multiprogramming i
g is the processing, by a single computer, of the tasks of
several users at different stations in round-robin fashion.
Time-sharing
is the simultaneous processing of two or more
programs by multiple computers.
Multiprocessing
