Introduction:
The UPSC Law Optional subject is a vast and comprehensive subject that requires a thorough understanding of important judgments and landmark cases in order to excel in the exam. While attempting mock tests can be a helpful strategy for exam preparation, it is advisable to revise the important judgments and landmark cases before attempting the mock tests. This will ensure a better understanding of the subject matter and improve performance in the mock tests.

Importance of revising important judgments and landmark cases:
1. Comprehensive understanding: Revising important judgments and landmark cases helps in developing a comprehensive understanding of the subject. It allows candidates to grasp the nuances of legal principles, interpretations, and precedents set by the judiciary.

2. Application of legal principles: Revising important judgments and landmark cases enables candidates to apply legal principles to various scenarios and case studies. It helps in developing analytical and problem-solving skills, which are crucial for the UPSC Law Optional subject.

3. Answer writing: A thorough understanding of important judgments and landmark cases facilitates effective answer writing. It enables candidates to provide relevant examples and references in their answers, which can significantly enhance their scores in the exam.

Benefits of attempting mock tests:
1. Assessment of knowledge: Mock tests provide an opportunity to assess one's knowledge and understanding of the subject. They help candidates identify their strengths and weaknesses, enabling them to focus on areas that require improvement.

2. Time management: Mock tests help candidates develop effective time management skills. They provide a simulated exam environment, allowing candidates to practice answering questions within the given time frame.

3. Exam strategy: Attempting mock tests helps candidates formulate an effective exam strategy. It allows them to understand the exam pattern, identify important topics, and prioritize their preparation accordingly.

The ideal approach:
While it is possible to attempt mock tests without revising important judgments and landmark cases, it is not advisable. To make the most of mock tests and maximize their benefits, it is recommended to follow these steps:

1. Thorough revision: Before attempting mock tests, dedicate sufficient time to revise important judgments and landmark cases. Make comprehensive notes, summarize key points, and ensure a clear understanding of the legal principles involved.

2. Analyzing previous year questions: Analyze the previous year's question papers to identify the recurring themes and areas of focus. This will help in directing your revision and mock test practice.

3. Attempt sectional tests: Start by attempting sectional tests that focus on specific topics or areas. This will help in assessing your understanding and retention of important judgments and landmark cases related to those topics.

4. Full-length mock tests: Once you have revised the important judgments and landmark cases, attempt full-length mock tests to simulate the actual exam scenario. Analyze your performance, identify areas that need improvement, and focus on strengthening your knowledge and understanding accordingly.

In conclusion, while attempting mock tests can be a valuable strategy for UPSC Law Optional subject preparation, it is advisable to revise the important judgments and landmark cases before attempting them. This will ensure a better understanding of the subject matter and improve performance in the mock tests, ultimately enhancing the chances of success in the UPSC exam.