Yes, there is a provision for a descriptive section in the SBI PO Mains Exam. The descriptive section is designed to test the candidate's proficiency in writing skills and their ability to express their thoughts clearly and effectively in English.

Format of the Descriptive Section:
The descriptive section consists of two questions: an essay writing question and a letter writing question. Candidates are required to choose one topic from each section and write an essay and a letter within the specified word limit.

Essay Writing:
In the essay writing question, candidates are provided with a topic and they need to write an essay on it. The topics can be related to current affairs, social issues, or any other relevant topic. The word limit for the essay is usually around 250-300 words. Candidates are expected to present their arguments, provide examples, and express their opinions in a coherent manner.

Letter Writing:
In the letter writing question, candidates are given a situation or a scenario and they need to write a formal or informal letter based on it. The topics can be related to official communication, complaints, suggestions, or any other relevant topic. The word limit for the letter is usually around 150-200 words. Candidates are expected to follow the correct format and structure of a formal or informal letter.

Evaluation Criteria:
The descriptive section is evaluated based on various factors such as content, coherence, language skills, grammar, and overall presentation. Candidates are expected to write in a clear and concise manner, with proper grammar and punctuation. The essay and letter should be well-structured and organized, with a logical flow of ideas. The content should be relevant and supported by examples or arguments wherever necessary.

Preparation Tips:
To prepare for the descriptive section, candidates should practice writing essays and letters on various topics. They should read newspapers, magazines, and other relevant sources to stay updated with current affairs and social issues. It is also important to improve vocabulary, grammar, and sentence construction skills. Candidates can refer to previous years' question papers and sample essays to get an idea of the format and style of writing.

In conclusion, the descriptive section in the SBI PO Mains Exam tests the candidate's writing skills and ability to express their thoughts clearly and effectively. It is important for candidates to practice writing essays and letters on various topics and improve their language skills to perform well in this section.