IIT

The Indian Institutes of Technology (IITs) and National Institutes of Technology (NITs) are India's the finest technical colleges, but they differ in important ways. IITs are autonomous national institutes with a global reputation for excellent academic standards, cutting-edge research, and a very competitive entrance exam. NITs, while also prominent, have a slightly different focus, emphasising regional development and a broader admissions process via JEE Main. IITs often have stronger facilities, finance, and global recognition than NITs. While both provide excellent technical education and opportunity, IITs are frequently regarded as more prominent due to their tough selection procedure and large alumni network.

No, you cannot take a correspondence course (also known as distance education) for a BTech degree at IITs or NITs  (or any other reputable institute in India) because the Supreme Court of India has ruled that BTech programs require extensive practical training, which is difficult to achieve effectively through pure distance learning. Therefore, accredited institutions offering B.Tech degrees must have a significant in-person component.

Alternatives to Consider:

• B.Tech Distance Education from Accredited Universities: While IITs and NITs don't offer distance B.Tech, some universities do. Ensure the programme is accredited by UGC (University Grants Commission) or AICTE (All India Council for Technical Education) for wider recognition. However, be aware of the limitations of distance education as discussed previously.
• Online Courses: Online platforms like NPTEL and Coursera offer high-quality engineering courses that can supplement your learning or provide specialised knowledge in specific areas.
• M.Tech Programs (for working professionals): Some IITs and NITs offer M.Tech programs through distance education, but these are typically for working professionals who already hold a B.Tech degree.