There are no negative markings for incorrect answers in the Civil Engineering Optional Subject of the UPSC exam. Unlike some other competitive exams, the UPSC does not deduct marks for wrong answers. Therefore, candidates are encouraged to attempt all questions, even if they are unsure of the correct answer. This policy is followed by the UPSC to ensure that candidates have a fair chance and are not penalized for guessing or making mistakes.

However, it is important to note that there is no provision for negative marking in the Civil Engineering Optional Subject. This means that candidates will not lose marks for incorrect answers. The marking scheme for the optional subject is based on the total number of correct answers provided by the candidate. Each correct answer carries a certain number of marks, which are added up at the end to calculate the candidate's score.

It is advisable for candidates to attempt all questions in the optional subject, as leaving any question unanswered will result in zero marks for that particular question. By attempting all questions, candidates have a chance to score marks even if they are unsure of the correct answer. This strategy can potentially increase the candidate's overall score and improve their chances of success in the UPSC exam.

In conclusion, there are no negative markings for incorrect answers in the Civil Engineering Optional Subject of the UPSC exam. Candidates are encouraged to attempt all questions and provide their best possible answers to maximize their chances of scoring well in the exam.