An open-source operating system is one where the source code is publicly available, allowing users to study, change, and distribute the software for any purpose.
Open-source licenses typically grant the freedom to:
Conclusion for ‘a’: Generally correct.
The availability of source code enables developers to modify the OS to meet specific needs. This makes open-source systems highly customizable.
Conclusion for ‘b’: Generally correct.
Technical support for open-source OSes can vary:
Conclusion for ‘c’: Not universally true or guaranteed for all open-source OSes.
Correct Answer: Option (2) – Open-source OSes are free to use and distribute, and easy to customize.
Quick Tip: Open-source software offers freedom and flexibility, but support quality may vary by distribution and user skill level.
Consider the following lists:
Identify the correct match.

| List-I | List-II |
|---|---|
| a. BCD code | iv. Code used to represent decimal digits in binary form |
| b. EBCDIC | i. Code used for encoding characters in IBM mainframe systems |
| c. ASCII | ii. Codes widely used for character encoding standard for electronic communication |
| d. Unicode | iii. Universal character encoding standard that can represent virtually all written languages |
A sum of Rs. 800 amounts to Rs. 920 in 3 years at simple interest. What would be the amount, if the interest rate is increased by 3%?
In what ratio must water be mixed with milk to gain 20% by selling the mixture at cost price?