Which units have to be studied for NIELIT A/B/C level exam?

Yes, definitely the NIELIT certificates, especially for O, A, B, and C levels, hold significant value in India and is recognised by the government for employment and promotions.

The eligibility criteria of NIELIT exam varies as per the course. To be eligible for the NIELIT exam candidates must have minimum 10+2, ITI, Diploma, or a B.E./B.Tech/M.Sc./MCA. 
There is no minimum percentages. For higher courses, students must have relevant post-qualification experience like S

The objective of the NIELIT entrance test is to shortlist candidates for recruitment on various posts for its own projects or for other government departments, often on a contract basis. 

Yes, NIELIT is government job because the National Institute of Electronics & Information Technology is an autonomous scientific society which comes under the administrative control of India's Ministry of Electronics & Information Technology (MeitY).

The National Institute of Electronics & Information Technology (in short known was the NIELIT) is an annual entrance exam which is conducted for various certification and level-based exams (like O/A/B/C levels) for IT and electronics training. The objective of the exam is to also recruits for techni