SCL 3 (Question 1)

Windows 8	Specifications	Android
an operating system developed by Microsoft which for use on personal computers, including home and business desktops, laptops, tablets, and home theater PCs.	Definition	a Linux-based operating system designed primarily for touchscreen mobile devices such as smartphones and tablet computers. Initially developed by Android, Inc., which Google backed financially and later bought in 2005,
The web browser available in Android is based on the open-source WebKit layout engine, coupled with Chrome's V8 JavaScript engine. The browser scores 100/100 on the Acid3 test on Android 4.0.	Web browser	Internet Explorer 10 is the default browser in Windows Phone 8 and carries over key improvements also found in the desktop version. The navigation interface has been simplified down to a single customizable button (defaults to stop / refresh) and the address bar. While users can change the button to a 'Back' button, there is no way to add a 'Forward' button.
A user can switch between "active" tasks by pressing and holding the Back button, but any application listed may be suspended or terminated [28] under certain conditions, such as a network connection being established or battery power running low. An app running in the background may also automatically suspend if the user has not opened it for a long duration of time. The user can force quit an application by pressing the "back" button repeatedly, which flips through and closes each open app.	Multi-tasking	Multitasking of applications, with unique handling of memory allocation, is available
20 (approx.)	Total devices	Hundreds (approx.)
Sky Drive	Cloud integration	Google Drive

SCL 3 (Question 1)

Operating system used in a desktop/laptop nowadays are Windows 8,Windows 7 and Windows Vista . An operating system (OS) is a collection of software that manages computer hardware resources and provides common services for computer programs. Operating Systems have started to pop up in a smaller computers as well. An operating system provides for basic interface and control of all the components of your computer, it builds on the very rudimentary controls established by the system BIOS.

Windows 8 

Advantages :

•  Enhanced search function.
•  Windows Live Syncing.
•  Speedy Boot Time.

Disadvantage :

•  It is difficult to move between screens.
•  The smallest size of the tiles, zoom is still too big.
•  Switching from Metro applications and desktop applications is very difficult.

Windows 7

Advantage :

•  Faster than its predecessors.
•  Allows the user to make the best use of graphic cards from the different vendors.
•  Allows the user to overcome the clutter in the desktop by introducing three new features Aero Peek, Aero shake and snap.

Disadvantage :

•  The user need to buy out additional resources such as RAM, etc to make use of them.
•  The user needs to go to the new HP solution Center if the user has got an HP multifunction printer, and its driver being  upgraded to the Windows 7, then the printer don’t response to the print commands. 

Windows Vista

Advantage :

•  Manage your knotty kids, using parental controls
•  The user will get the search result as and when the user type some letters of a particular word.
•  It has got an inbuilt tool called as Photo Gallery to manage digital photos.

Disadvantage :

•  The window appearance underwent lot of unwanted changes.
•  The price of Windows Vista Ultimate edition seems to be too high.

SCL 1 (Question 2)

NO	MALICIOUS PROGRAM	DESCRIPTIONS
1	WORMS	DESIGNED TO TUNNEL INTO SYSTEM AND ALLOW MALICIOUS USERS TO CONTROL COMPUTER REMOTELY EXAMPLE : SILLY FDC
2	TRICKY TROJANS	USUALLY OPERATES BY TRICKING USERS INTO DOWNLOADING AND RUNNING THE BOGUS SOFTWARE ON THEIR COMPUTER SYSTEM CAUSES SERIOUS DAMAGE DURING FILE DELETING DESTROYS INFORMATION IN COMPUTER DOES NOT INFECT OTHER FILES STRIKES BY DISPLAYING ANNOYING POP-UP WINDOWS

3	BAD BOTS	USE INFECTED COMPUTERS TO SEND SPAM  AND HOST PHASING WEBSITES THEY ARE REFERRED AND ZOMBIES ATTATCHED TO A COMPUTER TO GAIN COMPLETE CONTROL OVER IT
4	SPYWARE	PROGRAM INSTALLED WITHOUT USER’S PERMISSION SOME IRRITATING YET HARMLESS SPYWARE MAY STEAL COMPUTER’S MEMORY AND POWER IT IS MOST DANGEROUS CAUSE IT CAN  STEAL OUT PERSONAL INFORMATION OR FINANCIAL DATA USUALLY USED BY SCAMMERS TO GET CONFIDENTIAL INFORMATION OF OTHER PEOPLE
5	WABBIT	WABBIT IS A SELF REPLICATING-THREAT ITS NOT VERY HARMFUL BECAUSE IT DOES NOT WORKING LIKE VIRUS EXAMPLE : DDOS ATTACK
6	KEYLOGGER	KEYSTROKE LOGGING IS THE ACTION OF TRACKING THE KEYS STRUCK ON KEYBOARD. TYPICALLY CONVERT MANNER SO THAT THE PERSON USING KEYBOARD IS UNAWARE THAT THEIR ACTIONS ARE BEING MONITORED.
7	SCAREWARE	PLANTED IN COMPUTER SYSTEM AND SUDDENLY TELLS THE USER THAT THEIR COMPUTER IS INFECTED BADLY TENDS TO SCARE USERS ABOUT THE VIRUSES THAT  ATTACK THEIR COMPUTER
8	COMPUTER VIRUS	THEY CANNOT BE SRPEAD WITHOUT HUMAN ACTIONS THEY CAN DAMAGE FILES, SOFTWARE AND HARDWARE THEY WILL SPREAD TO ONE ANOTHER

SCL 2. (Question 1)

SCL 2. (Question 1)

What is open source software?

Open-source software is computer software that is distributed along with its source code, a code which is used to create the software under a special software license. The license allowed the copyright holder to provide the right to study, change and distribute the software to anyone and for any purpose either before or after it has been modified.

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

The advantages of open source are the low costs, the freedom to modify the software, open standards that support collaborative development, and freedom to upgrade as needed. People have their rights to control the software's code. Open Source software provides further flexibility through freedom from a single vendor and freedom to modify the software. Besides, there are no license fees for an open source software, reducing annual license fees cost to zero, free of royalties and fees,  and commonly it is known as free software.

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
Firefox: It offers features such as tabbed browsing, incremental find, spell checking, live bookmarking, a download manager, private browsing, and location-aware browsing. It is also an exceptional product that expands its use with add-ons created by avid users. We can choose from over a thousand add-ons to personalize and make it our own.	Internet Explorer: It only works with Windows and not compatible with other operating systems. IE systems are slow when it comes to rendering pages and it has been a constant target for malicious coders and lacks in security. The newest version of IE 9 offers features such as faster responses, tracking protection, pinned site for favourite sites, location capabilities, one search box and more viewing spaces.
VLC: VLC is a powerful open source application that can play numerous video and audio formats with no codec packs required and can also do media conversion and streaming. VLC supports practically every audio/video codec and file format. The most recent VLC release also offers live recording of streaming video, frame-by-frame advancement and superb speed controls.	Windows Media Player: It comes with Windows operating systems and it offers intuitive navigation of the audio and video library. However, it often does not stream video properly, especially over slow DSL connections and it is limited as to which portable devices it can sync to.
Pidgin: Pidgin is a multiprotocol Instant Messaging client that allows us to use all of our IM accounts at once. (AIM, Bonjour, Gadu-Gadu, Google Talk, Grouowise, ICQ, IRC, MSN, QQ, SILC, SIMPLE, Sametime, XMPP, Yahoo!, Zephyr).	Google Talk: Google Talk is an Instant Messaging service, which is integrated with Gmail or available as a separate download. It is a functional app needed when it comes to staying in contact with our Gmail friends.
Thunderbird: It can help us to better manage our unruly inbox, scales to the most sophisticated organizational needs while making it easy to find what we need. It is more flexible, contains vast collection of themes and extensions available, and it provides security protection firewalls, spam filters and anti virus properties.	Microsoft Outlook: It does not allow us to create folders, flags, or rules that learn by example. It lacks of useful message templates, not flexible and does not give a choice to anti-spam engine full of security features.
Winpooch: It is an open source protection from spyware and the like. By scanning files in real-time on our computer, it detects malware and makes sure they do not infiltrate our system. It also sees and prevents all attacks from viruses, spyware, trojan programs and others.	Kaspersky Anti-virus Personal: It is well known for its outstanding detection rates. It commits to multiple tasks as it protects against viruses, script viruses, checks file archives and removes viruses from mail.