Which of the following is NOT an open-source operating system?
- A.Windows
- B.Ubuntu
- C.Android
- D.Linux
Correct answer
Explanation
The correct answer is A, Windows. Windows is proprietary, or closed-source: Microsoft keeps its source code private and sells it under a licence that does not let users study, change or redistribute the code. An open-source operating system publishes its source code under a licence that allows anyone to read it, modify it and share it, usually free of cost. Option B is wrong because Ubuntu is a free Linux distribution released by Canonical under open-source licences, widely used on desktops and servers. Option C is wrong because Android is built on the Linux kernel and its core is released as the Android Open Source Project, which is why phone makers can adapt it. Option D is wrong because Linux is the classic example: Linus Torvalds released the kernel in 1991 under the GNU General Public License, and Fedora, Debian and Red Hat all grew from it. Exam tip: closed-source - Windows, macOS and iOS; open-source - Linux, Ubuntu, Fedora and Android.
Practice Questions
View allWhich language uses the symbolic representation of machine codes needed to program a particular processor or processor family?
- A.Machine Language
- B.Assembly Language
- C.High-Level Language
- D.All of the above
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Assembly language replaces the binary machine codes of a processor with short symbols called mnemonics, such as MOV, ADD and JMP.
Read the full explanation →Which one of the following is the characteristic of Artificial Intelligence ?
- A.Replicates human decision making
- B.Stores relevant information
- C.Stores similar kind of data for a specific purpose
- D.Allows user to interact with media
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Artificial Intelligence is the ability of a machine to perform tasks that normally need human intelligence, such as reasoning, learning and taking decisions.
Read the full explanation →What is an interactive combination of text, graphics, video, audio and images termed as ?
- A.JPEG
- B.Multimedia
- C.AVA
- D.PNG
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Multimedia means using several forms of media, such as text, graphics, audio, video, images and animation, together, often in a way the user can interact with.
Read the full explanation →Which among the following is a malicious software?
- A.Hacking
- B.Password Cracking
- C.Trojan Horse
- D.Firewall
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A Trojan is a program that looks useful or harmless but secretly carries harmful code, so it is a piece of malicious software, or malware.
Read the full explanation →Which one of the following is not an application software?
- A.Spreadsheet
- B.AutoCAD
- C.MS PowerPoint
- D.Linker
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A linker is system software, a programming tool that joins compiled pieces of code into one program that can run; it does not do a task for the end user.
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