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QUESTION1.1.5 Identify various product of operating system

a. Closed source system b. Open source system

What is closed source system? Closed source system means that the source

code is held by the developer of a development, and only they can make any changes or study it.

Closed source system don’t reveal their source code, as the result the only people who can debug the source code are some of those who work in the company of a development.

Full support from vendor if any problem occurs.

Advantages and disadvantages of closed source systemADVANTAGES DISADVANTAGES

1. Direct vendor technical support which means when system support is needed, in case of problem or upgrade, the actual person or team who created the system can work on it.2. Support is obligatory rather than optional as when something goes wrong, the owner of the system is responsible to sort it out.3. These system more secure since the code isn’t public – take time for a cracker to break the system.

1. You cannot edit the code or make customized changes to it. 2. Cost great amounts of money to pay for the OS, the other upgrades and also for all the add-ons.

What is open source system? Open source means the source code is

available (under a copyright license) to the user means the source readability. The user can modify and change it.

Everyone who knows enough programming skills and is willing to read the source code, can debug it. They will be debugged by a much larger number of people because of the source code is open.

No one is responsible for support if any problem occurs.

Advantages and Disadvantages of open source systemADVANTAGES DISADVANTAGES

1. Open source system is free to use, free to distribute, and free to modify.2. It has lower costs than closed source system.3. Also usually the more secured as the code is accessible to everyone.4. Many people have access to the code as there are a large number of sources for support.

1. Open source operating system like Linux cannot be learned in a day as they require effort and possibly training before you are able to master them.2. So many developments are going on at the same time it is hard to keep track of which version is the most up to date. 3. There may also be less support available for when things go wrong open source system tends to rely on its community of users to respond to and fix problems.

Source Code• Source code contains variable declarations,

instructions, functions, loops and other statement that tell the program how to function.

• Code written by a programmer in a high-level language and readable by people but not for computer, so must be converted to object code/machine language by compiler, assembler or interpreter before a computer can read and execute the program.

C++ Program example code

Various product of operating

system a. Closed source system

b. Open source system

a. closed source operating system

b. Open source operating system

Microsoft Windowsis an operating environment created by Microsoft that provides an interface known as Graphical User Interface (GUI) for computers. 

ADVANTAGES OF WINDOWS

1. Microsoft has made several advancements and changes that have made it a much easier to use Operating System, and although arguably it may not be the easiest Operating System, it is still Easier than Linux.2. Because of the large amount of Microsoft Windows users, there is a much larger selection of available software programs, utilities, and games for Windows.3. Microsoft Windows includes its own help section, has vast amount of available online documentation and help, as well as books on each of the versions of Windows.

DISADVANTAGE OF WINDOWS 1. Although Microsoft Windows has made great improvements in reliability over the last few versions of Windows, it still cannot match the reliability of Linux.2. Although Microsoft has made great improvements over the years with security on their Operating System, their Operating System continues to be the most vulnerable to viruses and other attacks.3. Microsoft Windows is not open source and the majority of Windows programs are not open source.

Example of Microsoft Windows Source code

iOSOn mobile or tablet system

Apple's mobile operating system for its iPhone, iPod touch, iPad, Apple TV and similar devices. iOS was originally called the iPhone OS but was renamed in 2010 to reflect the operating system’s evolving support for additional Apple devices. Closed source, with open source components.

Advantages of iOS Performance is awesome Generates less heat when compared to Android Best gaming experience Vast number of applications Suits for business and gaming Excellent security Multitasking Excellent for media entertainment Multilanguage support Quick settings in notification bar Metal and shiny coating is ultimate for Apple devices Many cases and covers makes it waterproof Sapphire glass which is hard Finger print scanning gives tough security Excellent camera quality even though mega pixels are less

Disadvantages of iOS Not flexible, only supports iOS devices Not open source The main disadvantages of using iOS is

costly Apps and no widget support Devices are very pricey Applications are very large when compared

to other mobile platforms Supports only single SIM Battery performance is very poor on 3G

Example of iOS Source Code

Various product of operating

system b. Open source system

Linux

It is the software on a computer that enables applications and the computer operator to access the devices on the computer to perform desired functions.. 

ADVANTAGES OF LINUX 1. The majority of Linux variants are available for free or at a much lower price than Microsoft Windows.2. Linux is and has always been a very secure Operating System. Although it still can be attacked when compared to Windows, it much more secure.3. The majority of Linux variants and versions are notoriously reliable and can often run for months and years without needing to be rebooted.4. Many of the Linux variants and many Linux programs are

open source and enable users to customize or modify the code as they choose.

DISADVANTAGES OF LINUX 1. Although the majority Linux variants have improved dramatically in ease of use, Windows is still much easier to use for new computer users.2. Linux has a large variety of available software programs, utilities, and games. However, Windows has a much larger selection of available software.3. Linux companies and hardware manufacturers have made great advancements in hardware support for Linux and today Linux will support most hardware devices. However, many companies still do not offer drivers or support for their hardware in Linux.

Example of Linux Source Code

AndroidOn mobile or tablet system

Android is an open source operating system with a Linux-based platform for mobile phones which is developed by Google.

Advantages of Android1. Multitasking – Android phones can run many applications, it means you can browse, Facebook while listened to the song.2. Ease of Notification – Any SMS, Email there will always be a notification on the Home Screen Android phone, do not miss the LED indicator is blinking, so you will not miss a single SMS, Email or even Misscall .3. Easy access to thousands of applications via the Google Android App Market – When you love to  install applications or games, through Google’s Android App Market, you can download applications for free. There are many thousands of applications and games that are ready for download on Android phones You.4. Widget – with the widgets on the homescreen, You can easily access a variety of settings quickly and easily.

Disadvantages of Android

1. Advertising - Application in the Android phones can indeed be obtained

easily and for free, but the consequences in each of these applications, will always be ads on display, either the top or bottom of the application2. Wasteful Battery 

- Android more wasteful than any other operating system, because this operating system is a lot of "process" in the background that lead to the battery quickly drains.3. Many applications contain virus 

- the virus inserted android applications contain virus which also present in the Android Market.

Example of Android Source Code

That allThank you.