Hey Srishti,

So the NTPC selection process is divided into 5 stages:

1. Preliminary Exam

- General Awareness, basic reasoning and math skills are assessed

2. Mains Exam

- A 90 minutes exam carrying 120 marks with negative marking

- Tests the candidate in same domains as prelims 

3. Skill Test

Aims to assess two basic skills:-

a) Computer - Based Aptitude

b) Typing Skill

4. Document Verification

5. Medical Examination and Fitness Test