SCL 3 (Question 1)

1.        List down all the operating system use in a desktop/laptop today and find good descriptions of how operating system work? Hence,state that advantages and disadvantages.

Operating System	Description	Advantages	Disadvantages
Microsoft Windows	A friendly operating system	-Works with most kind of software and hardware.	-Easily to catch on virus and trojan
Mac OS	High quality software	-Not easily affected by the virus.	-Software on Mac OS is not so complete.
UNIX and Linux	The simplest term of an operating system.	-It is free and easy to use. -More stable and does not go down as often as windows does, therefore it require less administration and maintainence.	-It has no standard edition,which makes it difficult for beginners to use the system.
DOS	The first operating system used by IBM-Compatible computers.	-DOS is very lightweight and is allows direct access to most hardware. -DOS will run on a much smaller system. (Entire OS can be placed on a single modern ROM chip.)	-It’s a single user OS (One user can work at one time) -It’s a single tasking (One application can run at a time) -It does not support Graphics.
Handheld operating system	An operating system that can run various types of application software known as apps.	-Portable -Smaller than typical laptop. -Can replace nootbooks.	-Smaller keyboard, thus it is hard to type. -Too small, thus it makes it easily to be stolen.

By : Muhamed Danish
Luqman

SCL2 (Question 1)

What is open source software? 

                   

   

Open source  software is source code available to programmers who want to modify an improve the software.

 In your opinion, why people prefer open source software over proprietary alternatives nowadays?

In our opinion why people prefer open source software over proprietary alternatives nowadays because an open source code base is own asset. A proprietary code base is someone else's asset. Open source software is also can be updated for free. Moreover, we can have more control on the open software compare to proprietary software. Furthermore, open software are more stable and programmers can  make better software by studying the source code others have written. That is why we think that open source software is more preferred by people nowadays.

Name top (fives) 5 most popular open source software and compare them with similar proprietary software (e.g. Open Office versus Microsoft Office).

Open source software	Proprietary software
Open Office Impress Open OfficeImpress is a truly outstanding tool for creating effective multimedia presentations. Presentations will stand out with 2D and 3D clip art, special effects, animation, and high-impact drawing tools.	Ms PowerPoint Microsoft PowerPoint provides user with an interface to design multimedia slides to be displayed on projection system or personal computer. The software incorporate images, sounds,videos, texts and charts to create an interactive presentation.
Open Office Draw Draw - from a quick sketch to a complex plan, Draw gives you the tools to communicate with graphics and diagrams. With a maximum page size of 300cm by 300cm, Draw is powerful tool for technical or general posters,	Adobe Illustrator Adobe Illustrator is a program primarily used to create what is often called outline art. Examples of outline art are a typical company logo, or a technical drawing, or the customized lettering on virtually any commercial product.
Open Office Calc Open Office Calc is the spreadsheet program we are always wanted. Newcomers find it intuitive and easy to learn, professional data miners and number crunchers will appreciate the apprehensive range and advance  functions.	Microsoft Excel Microsoft Excel is a spreadsheet application developed by Microsoft. It consist of calculation, graphic tools, pivot table and many more. This using  agrid of cells arrange numbered rows and letter-named columns to organize data manipulations like arithmetic operations.
OpenOffice Writer Open Office Writer Writer has everything  that users would expect from a modern, fully equipped word processor or desktop publisher. It's simple enough for a quick memo, powerful enough to create complete books with contents, diagrams, indexes,  and many more.	Microsoft Word Microsoft Word is a word processing software application that enables you do easily create both simple and complex documents, such as memos or reports. Microsoft Word provides tools to enable you to check spelling of your document, create merge letters and add graphics to enhance your written information.
Amaya Amaya is a Web editor, i.e. a tool used to create and update documents directly on the Web. Browsing features are seamlessly integrated with the editing and remote access features in a uniform environment. This follows the original vision of the Web as a space for collaboration and not just a one-way publishing medium.	Adobe Dreamweaver Adobe Dreamweaver is a site building and publishing tool appropriate for intermediate to advanced users that allows you to create and edit web pages and applications using a graphical interface and built-in advanced design and coding features directly on web.

By : Nur Ain Asilah

       Dalila Shahirah

SCL 2 (Question 2)

2) Threats and malicious program that can damage a computer, mobile device or disrupt any system.

Types of malware	What it does
1.      Computer virus	·         Set of program instruction that attaches itself to a file, reproduce itself and spread to other files. ·         A small software program that spread from one computer to another and interferes with computer operation. ·         It might corrupt or delete data on a computer use an email program to spread the virus to other computers or even delete everything on the hard disk. ·         Current known computer virus spread by attachment in email messages or by instant messaging messages. ·         Virus can be disguised as attachment of funny images, greeting cards, or video files. ·         It also spread through download in the internet.
2.      Computer worm	·         A worm is a computer code that spreads without user interaction. ·         Most worm begin as email attachment that infected the computer when they are open. ·         Worms usually cause computer and network performance and stability problems. ·         Example: mass-mailing worm
3.      Trojan horse	·         A Trojan horse hides inside other program. ·         It enters a legitimate program such as screen saver then it puts code into the operating system that enables a hacker to access the infected computer. ·         It usually spread by viruses, worms or download software. ·         Example: keylogger-stealing password ; Rmote Access Trojan (RAT)
4.      Bot	·         Bot is actually a short for ‘robot’. ·         Bot sneak onto a person’s computer and spread themselves across the Internet by searching for vulnerable, unprotected computers to infect. ·         When they found one, they quickly infect the machine and report to their master. ·         The bot is then awoken  by their master to perform a task. ·         They do not work alone, but are a network of an infected machines called a ‘botnet’. ·         Example are zombie and botnet.
5.      Spyware	·         Secretly gathers personal information without the victim’s knowledge. ·         They also can change the computer’s configuration or collect advertising data and personal information. ·         They also redirect the web browser of one’s computer to a different website that we intend to go.

How to remove a Trojan, Virus, Worm, or other Malware

1.	Download and extract the Autoruns program by Sysinternals to C:\Autoruns
2.	Reboot into Safe Mode so that the malware is not started when you are doing these steps. Many malware monitor the keys that allow them to start and if they notice they have been removed, will automatically replace that start up key. For this reason booting into safe mode allows us to get past that defence in most cases.
3.	Navigate to the C:\Autoruns folder you created in Step 1 and double-click on autoruns.exe.
4.	When the program starts, click on the Options menu and enable the following options by clicking on them. This will place a checkmark next to each of these options: ·         Include empty locations ·         Verify Code Signatures ·         Hide Signed Microsoft Entries
5.	Then press the F5 key on your keyboard to refresh the start ups list using these new settings. * The program shows information about your start up entries in 8 different tabs. For the most part, the filename you are looking for will be found under the Logon or the Services tabs, but you should check all the other tabs to make sure they are not loading elsewhere as well. Click on each tab and look through the list for the filename that you want to remove. The filename will be found under the Image Path column. There may be more than one entry associated with the same file as it is common for malware to create multiple start up entries. It is important to note that many malware programs disguise themselves by using the same filenames as valid Microsoft files. it is therefore important to know exactly which file, and the folder they are in, that you want to remove. You can check our Start up Database for that information or ask for help in our computer help forums.
6.	Once you find the entry that is associated with the malware, you want to delete that entry so it will not start again on the next reboot. To do that right click on the entry and select delete. This startup entry will now be removed from the Registry.
7.	Now that we made it so it will not start on boot up, you should delete the file using My Computer or Windows Explorer. If you cannot see the file, it may be hidden. To allow you to see hidden files you can follow the steps for your operating system.
8.	When you are finished removing the malware entries from the Registry and deleting the                 files, reboot into normal mode as you will now be clean from the infection.

By   : Siti norfaridatul binti Sulaiman

         Ferlicia anak Rasin

         Nurul Sarah binti Jalaluddin

SCL 3 (Question 2)

2. Nowadays, even smart phones have their own unique operating systems. Draw a table of comparison between the most popular OS in the smart phones, which are Android and Windows 8.

Android 4.2 (latest)	Features	Windows 8
-Yes -Android 4.2 have a central control centre -Varies as per the phone manifacturer	Control centre	-No -Does not have provision for a control centre -Users need to go to the setting menu for this
-Yes -Android 4.2 boassts of detailed notification including (toggles, music control etc)	Notifications centre	-Does not have central notification centre -Users can access control from the home screen via Live Tiles
-Users can switch between apps via Recents list	Multiasking preview	-Allows users to move between active apps via the multiasking preview features
-Android Beam is the NFC-based feature that allows people to share data wirelessly	Peer-to-peer sharing	-Users can share data with others via the NFC-based Tap+Share features
-Images are grouped by albums, dates and other tags	Photo grouping	-Photos are segregated as per album and date
-Only Samsung Galaxy S4 has the provinsion to share such photo streams	Shared photo stream	-Users can only share images one by one in Windows Phone 8 OS
-Apps do not update automatically -Users can select the option while downloading them	Automatic app updates	-Yes -Does have an Update All option for apps
-Driving mode allows In-car integration for smartphones and tablets	In-car integration	-Nokia Drive is avaible for in-dash integration
-Jelly bean	Code name	-Apollo
-12	Tentpole	- 8

By Syafiqah Binti Sejali

SCL1 (Question 1)

SPECIFICATION	TYPE	EXPLANATION
CPU	2.4-GHz Intel Core i7-3630QM processor	Intel Core i7 is the latest and best processor for student to do their work and play game (Multi-tasking).Besides, this processor is more advance than i5
Operating System	Windows 8	Windows 8 is the latest version operating system and has new features such as touch screen, windows apps store, new and higher security features such as built-in antivirus capabilities. Windows 8 also has faster start-up function rather than the previous windows.
RAM	16GB	With the 16GB RAM, students can open more application in one time without any interruption. This can help student doing their assignment and can save more time.
Hard Drive Size	1TB + 16GB SSD	Can save more data and software
Graphics Card	Dual Nvidia GeForce GT 650M	With high graphics card, students can have a high resolution image or video editing and nice graphic game resolution without flickering.
Interphase	6-1 card reader, 3 USB port	Can use many accessories in one time and it is a friendly user.
Size	15.2 x 10.2 x 0.6~1.4 inches	It is a standard size for an ideal laptop and it is easy to bring to anywhere.
Weight	2.8 Kg	It is a moderate weight and suitable for everyone especially for student.