Introduction:
When preparing for any competitive exam, solving previous year papers is an effective strategy to enhance one's preparation. However, it is important to determine whether it is more beneficial to solve the entire previous year paper or focus on specific sections/topics.

Benefits of solving the entire previous year paper:
1. Comprehensive coverage: Solving the entire previous year paper allows you to cover all the topics and sections that are typically included in the exam. This helps in gaining a thorough understanding of the entire syllabus and identifying any knowledge gaps.

2. Familiarity with exam pattern: By solving the entire paper, you become familiar with the exam pattern, question types, and the level of difficulty. This can help you develop a strategy to manage time effectively during the actual exam.

3. Practice under exam conditions: Solving the entire previous year paper simulates the actual exam experience. It helps you get accustomed to the time constraints, pressure, and the overall environment, which can boost your confidence and reduce exam anxiety.

Benefits of focusing on specific sections/topics:
1. Targeted preparation: By focusing on specific sections/topics, you can allocate more time and effort to areas where you feel less confident or need more practice. This approach ensures that you strengthen your weak areas and maximize your overall score.

2. Time management: Competitive exams often have time constraints, and focusing on specific sections/topics allows you to optimize your time by dedicating more hours to areas that carry higher weightage or are more challenging. This helps in improving your efficiency and accuracy during the actual exam.

3. Revision and reinforcement: Repeatedly solving specific sections/topics helps in revision and reinforcement of concepts. By practicing these areas extensively, you can improve your understanding, retention, and application of knowledge, which are crucial for performing well in the exam.

Conclusion:
In conclusion, while solving the entire previous year paper provides comprehensive coverage and familiarity with the exam pattern, focusing on specific sections/topics allows for targeted preparation, efficient time management, and better revision. It is advisable to strike a balance between the two approaches based on your strengths, weaknesses, and overall exam strategy. Regular practice, along with analyzing and learning from mistakes, is key to achieving success in competitive exams.