IIT Madras Data Science diploma is a one-year online program designed for working professionals who are interested in acquiring skills in data science. The program covers various topics such as data exploration and visualization, statistics and probability, machine learning, deep learning, natural language processing, and big data processing.

Since you have a background in mathematics, you may find the program's content familiar and useful for your career. The program also includes hands-on projects and case studies, which will help you apply the concepts you learn to real-world problems.

Regarding placements, IIT Madras does not provide any guarantees or assurances of placements after completing the course. However, the institute has a strong reputation in the industry, and the course content is designed to meet the current demands of the data science job market. Completing this program may increase your chances of getting hired by top companies in the field.

Your success in finding a job after completing the course will depend on various factors, such as your skills, experience, and current job market conditions. You may also need to actively apply to job postings and network with professionals in the field to increase your chances of getting hired.