OPERATING SYSTEM
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ANDROID
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Programming Platform
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Android is Linux based operating system designed primarily for touchscreen mobile devices such as smartphones and tablet computers. The programming language used is C,C++ and Java.
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User Interface
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Android is an app-centric ,the home screen is simple and stripped down. All the app icons can be moved or deleted except dialer ,application tray and web app. There are four hard button for each menu , homescreen ,returning back and search. Overall the interface is simple and straight forward. A little rough on the edges.
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Apps Openness
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Android’s got an estimated apps of 100,000. Google has designed Android to be as open as possible. Open Android market can let you download with less restrictive policy.
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Updates
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Google provide major updates to Android every six to nine months which most device are capable of receiving over the air. The latest major updates is the android 4.2 jelly bean . Porting android to specific hardware is a time and resource consuming process for device manufacturers ;hence ,old smartphones are not frequently updated.
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Security and Privacy
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Android application runs in a sandbox , an isolated area of the system that does not have access to the rest of the system’s resources ,unless an access permissions are explicitly granted by the user when the application is installed. This lessens impact the vulnerabilities and bugs but routinely requesting unnecessary permissions ,reducing its effectiveness
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Web Browsers
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Android ships with Google Chrome as its default web browsers and loaded with several browsing features and security.
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Performance
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Android has better synchronization with touch input, increase frame rates with multiple home screens. It also equipped with Google cloud messaging.
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Features
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Android OS providing multitasking features , custom pattern to unlock ,flash support ,multitude of different keyboards ,custom ROM installation and many downloadable features.
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Versions Available
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*4.2.x – Jelly Bean
*4.1.x – Jelly Bean
*4.0.3 – 4.0.4 – Ice Cream Sandwich
* 3.2 – Honeycomb
* 3.1 – Honeycomb
* 2.3.3-2.3.7 – Gingerbread
*2.3-2.3.2 – Gingerbread
* 2.2 – Froyo
*2.0-2.1 – Eclair
*1.6 – Donut
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F2 GROUP5
Sunday, September 8, 2013
2. Nowadays, even smart phones have their own unique operating systems. Draw a table of comparison between the two most popular OS in smart phones, which are Android and Windows 8.
SCL: 3: 1. List down all the operating system used in a desktop/laptop today and find good descriptions of how operating systems work? Hence, state their advantages and disadvantages.
The operating system that usually used
in a dekstop/laptop today are:
Windows 7
How it work :
Windows 7 was intended to be more
focused incremental upgrade to the windows line, with the goal of being fully
compatible with applications and hardware with which windows vista is already
compatible. For example, one of the features of windows 7 is jumplist. Jumplist
gives the option to view a list of recently accessed files by application is
not open, by right clicking on the application’s icon in the taskbar. it is
also allow to quickly accesed a favourite playlist without opening media player.
Advantages
and disadvantages :
Advantages
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Disadvantages
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It is expensive than the previous Microsoft
operating systems.
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WordPad in Windows 7 has improved much better and look
similar to the Microsoft Office Word. It can be used to open, edit file names
with docx extension which was earlier introduced with MS-Office 2007. Word
prediction is the new feature in Word Pad. Realistic brush has been added in
Paint.
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some of the features like Start Menu user interface,
Windows Ultimate Extras, InkBall, Windows Photo Gallery, Windows Movie Maker,
Windows Calendar Windows Mail called Windows Live Essentials were included in
Vista are removed in Windows 7.
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Windows 7 supports Virtual Hard Disks with the support of
enhanced performances of multi core processors.
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some of the users have problems such as; their system hangs
after installing Windows 7
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. Windows 7 supports Virtual Hard Disks with the support of
enhanced performances of multi core processors.
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users have problems such as; their system hangs after
installing Windows 7
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2. Discuss different types of threats and malicious program (malware) that can damage a computer, mobile device or disrupt any system. Search for information on current known malware program. Based on the information that you have found, create a table to list different types of malware, what it does, and how it can be repaired or removed. These information is useful for you to prevent any malware from damage your computer system.
Type
of Malware
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Effect
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Ways
to treat it
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Phishing
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The phishing scam masquerades as a legitimate website or
link to a site, but what it’s really trying to do is “fish” for information.
By fooling you into thinking that you’re visiting your bank or a shopping or
government website, the scam gets you to divulge personal or financial
information, which the Bad Guys then exploit.
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* Check e-mail address from sender.
*Don’t not open e-mail from an unknown sender.
*Mark it as spam.
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Spyware
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Like
its name says, spyware monitors your movements on the Internet, sending
information back to a central computer that then targets you with
advertising. It sounds okay, but the category has broadened to include
programs you download to your computer that monitor your activities to the
point that your computer slows down to a useless state. Further, the spyware
itself becomes nearly impossible to remove.
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* Disconnect from the internet.
*Scan the computer.
*Uninstall unwanted software.
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Trojan Horse
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The Trojan program is malware that masquerades as a
legitimate program. The program may have a legitimate function, but it
carries ulterior motives. Trojans can delete data, compromise security, relay
spam or porn, and otherwise infect your computer.
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* Reboot the computer.
*Start with safe mode.
*Install an original anti-virus.
*Scan computer and remove virus.
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Virus
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Like
its living counterpart, a computer virus infects your computer, taking
control over some or all of its functions. The virus destroys data or looks
for things like passwords, credit card numbers, or other sensitive data. This
information is often sent to another computer. A virus can also use your
computer to relay spam email or pornography or to coordinate attacks against
websites on the Internet.
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*Scan computer with anti-virus software.
*Reboot computer.
*Remove
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Worm
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Officially, a worm is a virus that replicates itself over
a network. Worms often arrive via email, peruse your address book, and then
send a copy of themselves to others in your address book, masquerading the
message as though it’s from you. Worms are used to deliver viruses, or the
worm itself might be a virus, because the terms are interchangeable.
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*Best to format the computer.
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SCL 2: 1. What is open source software? In your opinion, why people prefer open source software over proprietary alternatives nowadays? Name top (fives) 5 most popular open source software and compare them with similar proprietary software (e.g. Open Office versus Microsoft Office).
COMPUTER SOFTWARE
Open-source software (OSS) is computer software with its source code made available to programmers who want to modify and improve the software and licensed.
2. Why people prefer open source software over proprietary software?
People prefer open source software over proprietary alternatives because the software can be used in any way and for any legal purposes and there is no restriction in a unilateral way on how the software could be used. People have more control over that kind of software. They can examine the code to make sure it’s not doing anything they don’t want it to do, and they can change parts of it they don’t’ like. Users who aren’t programmers also benefit from open source software, because they can use this software for any purpose they wish-not merely the way someone else thinks they should. Some people prefer open source software because they consider it more secure and stable than proprietary software. Because anyone can view and modify open source software, someone might spot and correct errors or omissions that a program's original authors might have missed. Many users prefer open source software to proprietary software for important, long-term projects. Because the source code for open source software is distributed publicly, users that rely on software for critical tasks can be sure their tools won’t disappear or fall into disrepair if their original creators stop working on them.
The top 5 most popular open source software:
2. Linux
3. PDF
4. Mozilla Firefox
5. GIMP (GNU Image Manipulation Program)
4. Mozilla Firefox
OPEN SOURCE
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TYPE OF SOFTWARE
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PROPRIETARY SOFTWARE
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Open Office :
ü Free to download and install.
ü Bug reporting.
ü Updates as the developers fix bugs and add new features.
ü More compatible.
ü Able to save files into PDF format without additional software or plug-ins.
ü Able to open new files from any of the Open Office programs.
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Office Suite
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Microsoft Office :
ü Commonly use word processor.
ü No corrupt and Auto recovery features.
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LINUX :
ü Its not that hard to use.
ü Less viruses.
ü No crashes.
ü Can get help support on online.
ü Free software.
ü Runs on old machines.
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OPERATING SYSTEM
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Microsoft Windows :
ü Easy to use.
ü Available software.
ü Backwards compatibility.
ü Support for new hardware.
ü The competition in the area Plug & Play support for PC hardware.
ü A plethora of gaming titles are available for Windows.
ü Compatibility with MS driven websites
.
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SAMBA :
ü Free.
ü Open source.
ü Portable across multiple platforms.
ü Allows for easier networking of Windows workstations to computers running other platforms.
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FILE AND PRINT SERVER
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PDF :
ü Standard for sharing documents electronically.
ü Free.
ü The file is viewable of virtually any screen and printable on virtually any printer.
ü Can be used for any page size.
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MOZILLA FIREFOX :
ü Ability to add certain features to the browser using the Plug-in.
ü Fast web page downloads.
ü Safe browsing.
ü Multi-tab feature.
ü Private browsing.
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WEB BROWSER
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INTERNET EXPLORER:
ü Comes installed on computer.
ü Faster with Windows computers because it is integrated.
ü Some websites can only be used with Internet Explorer.
ü Universal.
ü Some applications are optimized for IE.
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GIMP :
ü Free.
ü Powerful and versatile.
ü Can open Photoshop files in GIMP.
ü Compatible with most operating system.
ü Support is easy available.
ü Easiest way to learn for beginners.
ü Easy to learn with video tutorials.
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IMAGE EDITOR
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ADOBE PHOTOSHOP:
ü Friendly interface.
ü High – tech coding
ü Huge numbers of features.
ü Adobe products are transferable between the different programs in its Creative Suite.
ü Amount of free education and support is available online.
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