Everything You Need to Know About the NIOS On-Demand Examination (ODE) — Dates, Process & Preparation. For thousands of students across India, flexibility matters more than anything—especially when it comes to board exams. Not every learner fits into the rigid academic timeline of traditional boards. That is where the NIOS On-Demand Examination (ODE)  becomes a life-changing opportunity, allowing students to appear for exams whenever they feel prepared. Whether you are in Cla