15 extra multiple-choice questions for Open Source Concepts (12th Standard Computer Applications, Samacheer Kalvi), beyond the ones printed in the textbook — each with the correct option highlighted and a clear, worked explanation. Free to read in English and Tamil.
Q1
Which researcher from MIT defined the four freedoms of free software in the 1980s?
- A. Richard StallmanCorrect
- B. Linus Torvalds
- C. Bob Metcalfe
- D. Paul Mockapetris
Explanation. Richard Stallman defined the four freedoms of free software in the 1980s while working at MIT, which led to the establishment of the Free Software Foundation.
Q2
Which of the following is not listed as a primary practice or benefit of Open Source Hardware?
- A. Remake
- B. Proprietary lockingCorrect
- C. Remanufacture
- D. Study and Learn
Explanation. Open source hardware emphasizes sharing and modifying design, including practices like remake, remanufacture, redistribute, resell, and learning, rather than proprietary lock-in.
Q3
What is the full form of C-DAC, the Indian institution that developed the BOSS operating system?
- A. Computer Division of Advanced Coding
- B. Centre for Development of Advanced ComputingCorrect
- C. Council of Digital and Advanced Communication
- D. Core Department of Applied Computing
Explanation. C-DAC stands for Centre for Development of Advanced Computing. It is an Indian government institution that developed BOSS to promote open source software in India.
Q4
Which government institution in India helps in the development and promotion of Free and Open Source Software (FOSS)?
- A. NRCFOSSCorrect
- B. ICANN
- C. IANA
- D. SCERT
Explanation. NRCFOSS stands for National Resource Centre for Free and Open Source Software. It is an Indian government institution dedicated to promoting open-source tools.
Q5
If an enterprise requires stability and long-term support for its network monitoring, which version of OpenNMS should it choose?
- A. Horizon
- B. MeridianCorrect
- C. Apex
- D. Zenith
Explanation. OpenNMS has two versions: Meridian is recommended for enterprises needing stability and long-term support, while Horizon is used for frequent innovations.
Q6
In which programming language is the enterprise-grade network monitoring platform OpenNMS written?
- A. C++
- B. Python
- C. JavaCorrect
- D. PHP
Explanation. OpenNMS is written in Java and can run on any platform that supports Java, making it highly scalable and cross-platform.
Q7
OpenNMS aims to manage the FCAPS network management model. What does the letter C represent in the acronym FCAPS?
- A. Connection
- B. Compression
- C. ConfigurationCorrect
- D. Computation
Explanation. FCAPS stands for Fault, Configuration, Accounting, Performance, and Security. Thus, the letter C represents Configuration management.
Q8
In the NS2 network simulator, which software tool is used to link together C++ and Object-oriented Tool Command Language (OTcl)?
- A. TclCLCorrect
- B. TclLink
- C. OTclConnect
- D. NS-Linker
Explanation. NS2 uses C++ for detail and OTcl for setup. These two languages are linked together using TclCL (Tcl with C++ classes).
Q9
Which of the following is an example of a permissive three-clause open-source license?
- A. Apache License 2.0
- B. BSD 3-Clause "New" or "Revised" licenseCorrect
- C. GNU General Public License (GPL)
- D. Microsoft Public License
Explanation. The BSD 3-Clause "New" or "Revised" license is a prominent open-source license mentioned alongside the BSD 2-Clause and Apache licenses.
Q10
Which of the following terms refers to proprietary software that can be downloaded at no cost but does not allow users to modify its source code?
- A. FreewareCorrect
- B. Free Software
- C. Open Source Software
- D. Shareware
Explanation. Freeware is proprietary software that is distributed at no cost, but its source code remains hidden and cannot be altered by users.
Q11
In which year was the first version of the OpenNMS network monitoring software released?
- A. 1995
- B. 1999Correct
- C. 2004
- D. 2008
Explanation. OpenNMS was originally released in 1999, making it the world's first enterprise-grade open-source network monitoring application.
Q12
In which year was the OpenNMS Group created to provide services, training, and support for the platform?
- A. 1999
- B. 2001
- C. 2004Correct
- D. 2010
Explanation. The OpenNMS Group was officially created in 2004 to offer professional services, training, and commercial support for the open-source platform.
Q13
Which of the following is considered an advantage of proprietary software over open source software?
- A. Free availability of source code
- B. No licensing fees or restrictions
- C. Dedicated corporate support, training, and stabilityCorrect
- D. Unlimited freedom to redistribute modified versions
Explanation. Proprietary software provides users and organizations with structured support, specialized training, and product stability, making it reliable for commercial environments.
Q14
Which of the following is commonly cited as a challenge or disadvantage of open source software?
- A. High initial purchase cost
- B. Potential difficulty for beginners to learn and useCorrect
- C. Inability to run on multiple operating systems
- D. Highly restrictive licensing terms
Explanation. Open source software can sometimes be difficult for beginners to learn, and might suffer from compatibility issues or a lack of direct support.
Q15
Why do network administrators need network simulation and monitoring software like NS2 or OpenNMS?
- A. To visually design slides and documents
- B. To manage and edit database tables
- C. To control, analyze traffic flow, and identify network faultsCorrect
- D. To compile server-side web scripting languages
Explanation. Network simulation and monitoring software are essential to manage complex setups, analyze traffic, and quickly report and fix faults.
