Sample Exam Questions

From the objective of OSS-DB Exam Silver
- General Knowledge - License

Sample Question


Choose two appropriate descriptions about the PostgreSQL license.

  1. The source code of PostgreSQL has been released, and anyone can download it.
  2. If you modify the source code of PostgreSQL, you have an obligation to disclose it.  
  3. When redistributing PostgreSQL source code by modifying it, there is no need to display the copyright. 
  4. PostgreSQL developers are obligated to correct fatal bugs.
  5. PostgreSQL can be used for free without user registration.

※This sample exam is different from those that appear in the actual OSS-DB Exam.

Answer and Explanation

Open source software has common features such as source code available, redistributable. However, there are several kinds of licenses, and conditions of source modification and redistribution are different. For this reason, you need to be careful as to what kind of license the software you use is.

The license of PostgreSQL is based on the BSD license, there is no obligation to disclose the code when the source is modified, and it can also be used commercially.‍