As part of the main syllabus changes for the 2013 civil services test, the GS paper-4, titled Ethics, Integrity, and Aptitude, was introduced. The primary intent of the UPSC in including this as a part of the curriculum was to test the student's aptitude, attitude, and evaluation of their approach to some issues relating to integrity, probity in public life, as well as their approach to problem-solving for a variety of issues and conflicts they encountered while dealing with the society.
For more info visit: https://posts.gle/cmeBPE