Every Book Back multiple-choice question from Open Source Concepts (12th Standard Computer Applications, Samacheer Kalvi) — each with the correct option highlighted and a clear, worked explanation. Free to read in English and Tamil.
Q1
If the source code of a software is freely accessible by the public, then it is known as
- A. freeware
- B. Firmware
- C. Open sourceCorrect
- D. Public source
Explanation. Open source software refers to programs whose source code is made freely available to the public, allowing users and other developers to view, modify, and distribute the code.
Q2
Which of the following is a software program that replicates the functioning of a computer network?
- A. Network software
- B. Network simulationCorrect
- C. Network testing
- D. Network calculator
Explanation. Network simulation software models the behavior of computer networks over time, allowing researchers to evaluate network performance and protocols.
Q3
Which of the following can document every incident that happened in the simulation and are used for examination?
- A. Net Exam
- B. Network hardware
- C. Trace fileCorrect
- D. Net document
Explanation. Trace files are generated during network simulations to log and record every event, packet transmission, and link state change for subsequent analysis.
Q4
Which is an example of network simulator?
- A. simulator
- B. TCL
- C. Ns2Correct
- D. C++
Explanation. NS2 stands for Network Simulator version 2, which is a widely used open-source, event-driven network simulation tool.
Q5
Choose the Correct Pair from the following to build NS2
- A. UNIX & TCL
- B. UNIX & a. C++
- C. C++ & OTclCorrect
- D. C++ & NS2
Explanation. NS2 is constructed using dual languages: C++ for backend packet processing and OTcl (Object-oriented Tool Command Language) for frontend scripting.
Q6
Which of the following is not a network simulation software?
- A. Ns2
- B. OPNET
- C. SSFNet
- D. C++Correct
Explanation. C++ is a general-purpose programming language used to construct simulation tools, but it is not itself a dedicated network simulation software package.
Q7
Which of the following is a open source network monitoring software?
- A. C++
- B. OPNET
- C. Open NMSCorrect
- D. OMNet++
Explanation. OpenNMS is a free, enterprise-grade, open-source network management system primarily used for comprehensive network fault and performance monitoring.
Q8
Open NMS was released in …………………
- A. 1999Correct
- B. 2000
- C. 2003
- D. 2004
Explanation. OpenNMS was originally launched as an open-source project in 1999, prior to the establishment of the OpenNMS Group in 2004.
About these Open Source Concepts questions
These are the Book Back multiple-choice questions for Open Source Concepts from the Tamil Nadu State Board (Samacheer Kalvi) 12th Standard Computer Applications syllabus. Each question shows the correct option and an original, step-by-step explanation so you understand the method, not just the answer. Use the answer key above to jump to any question, then take the practice test to check yourself under exam-like conditions.
Frequently asked questions
How many MCQs are there in Open Source Concepts?
This chapter has 8 book-back multiple-choice questions, each with the correct answer and a step-by-step explanation.
Are these 12th Standard Computer Applications MCQs free to practise online?
Yes. Every question, answer and explanation here is free, and you can also take them as a timed practice test.
Where can I find the Open Source Concepts book-back answers?
The correct option for each question is highlighted on this page with a worked explanation, plus a quick answer-key summary at the top.
