COMPUTER FUNDAMENTALS

Detailed explanation-1: -Which of the following operating systems can you freely modify if you choose? 2. D. Linux is the only open-source OS discussed in this book.

Detailed explanation-2: -Linux is a free, open source operating system, released under the GNU General Public License (GPL). Anyone can run, study, modify, and redistribute the source code, or even sell copies of their modified code, as long as they do so under the same license.

Detailed explanation-3: -Popular Linux distributions include Debian, Fedora Linux, and Ubuntu, the latter of which itself consists of many different distributions and modifications, including Lubuntu and Xubuntu. Commercial distributions include Red Hat Enterprise Linux and SUSE Linux Enterprise.

Detailed explanation-4: -Linux is considered a highly secure system, and bugs and vulnerabilities can be fixed easily due to its open-source platform, while it is not the case in terms of Windows.