Introduction:
Solving previous year papers is an effective strategy for UPSC exam preparation. It helps candidates understand the exam pattern, identify important topics, and improve time management skills. However, when it comes to attempting all questions or prioritizing certain question types, candidates should consider a balanced approach for better accuracy and score.

Attempt all questions:
Attempting all questions can be a viable approach for candidates who have a strong understanding of the subject matter and are confident in their problem-solving skills. This strategy has certain advantages:

1. Comprehensive coverage: Solving all questions ensures comprehensive coverage of the syllabus and helps identify any knowledge gaps.

2. Time management: It allows candidates to practice managing their time effectively, as the UPSC exam is known for its time constraints.

3. Familiarity with question types: Attempting all questions exposes candidates to different question types, helping them become familiar with the variety of questions that may be asked in the exam.

Prioritizing certain question types:
On the other hand, prioritizing certain question types can be beneficial for candidates who want to maximize their accuracy and score. This strategy has the following advantages:

1. Focus on strengths: Candidates can prioritize question types that align with their strengths and areas of expertise. This approach increases the chances of answering correctly and earning more marks.

2. Time optimization: By prioritizing certain question types, candidates can allocate more time to questions they are confident about, thereby maximizing their score potential.

3. Risk management: Certain question types may carry higher risks, such as lengthy calculations or subjective answers. By prioritizing other question types, candidates can minimize the risk of losing marks on challenging questions.

Conclusion:
In conclusion, the choice between attempting all questions or prioritizing certain question types depends on individual strengths, weaknesses, and confidence levels. A balanced approach can be adopted, where candidates aim to attempt all questions while giving more time and attention to the question types they are comfortable with. This strategy ensures comprehensive coverage, efficient time management, and increased accuracy, ultimately leading to a better score in the UPSC exam.