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IT 112 > week 2 > Flashcards

week 2 Flashcards

1
Q

OS

A

manages computer hardware, and software resources, and provides common services for computer programs.

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2
Q

OS components

A

1_ the kernel
2_ the loader
3_ Device Manager
4file manager
5 command interpreter
6_ GUI (graphical user interface)

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3
Q

The kernal

A

core of computer’s Operating system

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4
Q

The loader

A

loaded at system boot time

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5
Q

Device manager

A

it’s allows user to view and control the hardware attached to the computer

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6
Q

File manager

A

manage all the files on th computer

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7
Q

command interpreter

A

understand and executes command

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8
Q

GUI (graphical user interface)

A

allows the user to interact with electronic devices through graphical icons and audio

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9
Q

types of OS

A

1_ Workstation OS (Microsoft windows, Mac OS, Linux)
2_ Server OS (windows server, linux, unix)
3_ Mobile Device OS( android, iOS)

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10
Q

3 types of Workstation OS

A

1_ Enterprise client: Client in business network

2_ network OS: run on servers in business network

3_ home client:

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11
Q

3 main types of SW licensees

A

1_ proprietary: windows PC
2freeware: linux PC
3 shareware

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12
Q

proprietary SW license

A

the user have to buy a license to allow the user to use the SW
doesn’t transfer the ownership to the user
(windows, Mac OS, Adobe)

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13
Q

Freeware SW license

A

the author retains the ownership
some author give away the machine code only or give away the High-level language source code
can be downloaded by various Web sites

(Linux, Android, unix)

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14
Q

shareware SW license

A

allow the user free use of the SW but if the user is satisfied they pay a small amount ($10-$50)
the author retains the ownership
can be downloaded from web sites
(win zip, download accelerator)

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15
Q

core tasks of an OS

A

1_ processor management
2_ memory management
3_ device management
4_ file management
5_ application interface
6_ user interface

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16
Q

processor management

A

the OS makes sure that each application gets it’s necessary attention required

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17
Q

Memory management types

A

1_ virtual memory: separate the memory address used by a process from actual physical address

2_ Garbage collections: automated allocation

18
Q

Memory management

A

each application has enough Private memory, applications do not run into other applications

19
Q

file management

A

the OS is responsible for maintaining the file system

20
Q

device management

A

OS talks to and manages devices through device driver or software driver

21
Q

Device driver

A

computer program allowing higher-level computer programs to interact with hardware device

22
Q

application interface

A

application developers do not need to know much about the hardware

23
Q

types of OS (according to type of computer and application they support)

A

1_ real-time operating system (RTOS)
2Single-user, single task
3 single-user, multi-tasking
4_ multi-user, multi-tasking

24
Q

RTOS ( Real Time OS)

A

run computer embedded in machinery, manages the computer so that particular operation executes in precisely the same amount of time every time it occurs
(QXN, Real time linux)

25
Q

Single user /Single tasking OS

A

user can do one thing at a time
(MS-DOS)

26
Q

Single user /Multitasking OS

A

user can interact with several programs at once
(Mac OS, Linux, windows xp)

27
Q

mulit user / multi tasking OS

A

many users connect to one computer Each user has a unique session
(UNIX, Linux, VMS)

28
Q

stand alone operating system

A

a complete functioning framework
(liux,unix,MacOS)

29
Q

network operating system (NOS)

A

is a specialized operating system for network device such as router switch or firewall
(netware)unixx,linux)

30
Q

embedded operating system

A

computer system designed for specific purpose and achieving a specific task

31
Q

management intrefaces

A

graphical command-line to perform aspects of a system configuration

32
Q

control panel

A

tool to configure various aspects of Windows it is a legacy interface

33
Q

management console

A

represent more technical systems configuration option

34
Q

task manager (taskmgr)

A

allow the user to shutdown processer that are not responding

35
Q

task scheduler

A

sets task is to run at particular time

36
Q

types of memory

A

1_ system memory
2_Mass storage

37
Q

system memory

A

it’s volatile in nature (RAM)

38
Q

Mass storage

A

preserve data when the system is turned off (hard disk or a solid state drive)

39
Q

access control and protection

A

a computing device can only be used by an authorised person

40
Q

Basic Troubleshooting
Methodology

A

Zero in on an area.
Build a foundation.
Work up to the problem.
Repair/Replace.

IT 112 (9 decks)

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