Yes, you should participate in online history quizzes and mock tests to assess your knowledge. Here are the reasons:

1. Enhances Learning: Participating in online history quizzes and mock tests helps you to actively engage with the subject matter and reinforces your learning. It allows you to test your knowledge and recall information from memory, which aids in better retention of historical facts and concepts.

2. Identifies Knowledge Gaps: Taking quizzes and mock tests can help you identify areas where you lack understanding or have knowledge gaps. By analyzing your performance and reviewing the correct answers, you can focus on strengthening those specific areas to improve your overall knowledge in history.

3. Improves Time Management Skills: Online quizzes and mock tests are often timed, which helps in developing effective time management skills. By practicing under time constraints, you learn to allocate your time wisely and answer questions efficiently. This skill is crucial when it comes to competitive exams like UPSC, where time is limited.

4. Builds Exam Confidence: Regularly participating in quizzes and mock tests builds your confidence in tackling examination-style questions. It familiarizes you with the format and structure of the actual exams, reducing anxiety and allowing you to perform better under pressure.

5. Provides Real Exam Experience: Mock tests simulate the actual exam environment, providing you with a realistic experience. This experience helps you become accustomed to the exam format, question types, and time constraints. It also allows you to practice your exam strategies, such as managing time, prioritizing questions, and eliminating wrong answer choices.

6. Assesses Progress: Online history quizzes and mock tests provide a measurable way to track your progress over time. By comparing your results from previous attempts, you can gauge your improvement and identify areas that still need more attention. This information enables you to adjust your study plan and focus on weaker areas.

7. Offers Immediate Feedback: Online quizzes and mock tests typically provide immediate feedback on your performance. This feedback helps you understand your strengths and weaknesses, allowing you to address any misconceptions or gaps in knowledge promptly.

In conclusion, participating in online history quizzes and mock tests is an effective way to assess your knowledge, identify areas for improvement, and enhance your overall understanding of the subject. It helps in building exam confidence, improving time management skills, and providing a realistic exam experience. Regular practice and analysis of your performance will ultimately contribute to your success in competitive exams like UPSC.