Sample Exam Questions

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

Sample Question

2.04

Choose two descriptions out of the following that are
true about the PostgreSQL license.

  1. The same GPL-based license as the Linux kernel is used.
  2. A BSD-based license named ‘PostgreSQL license’ is used.
  3. You are not permitted to sell software for a fee that has been created by modifying the PostgreSQL source code.
  4. Selling software for a fee that has been created by modifying the PostgreSQL source code carries no obligation to disclose the modified parts.
  5. Selling software for a fee that has been created by modifying the PostgreSQL source code carries no obligation to disclose the modified parts.

※This sample exam is different from those that appear in the actual OSS-DB Exam.
2018/04/02

Answer and Explanation

PostgreSQL employs a license based on BSD called the ‘PostgreSQL license’. There are many kinds of licenses based on BSD, but a common feature, unlike GPL's copy left clause, for the use of secondary works (for example, programs created by modifying source code) there is no need. For example, you may sell secondary works for a fee and not publish their source code.

Therefore, the correct answer are B and E.