Hey Aspirant!
For getting into ISRO, you have to clear the examination conducted by ICRB(ISRO centralized recruitment board) for the post of scientist/engineer ‘SC'(MECHANICAL).
From past 2 years, ICRB is conducting exam twice in a year, one is during April and second in December. Please check website'ISRO Careers’ for further information. The notifications for the exam generally get out in the month of January/February for the exam in the month of April and in September/October for exam in December.
Phase 1: Written examination consists of 80 questions for 240 marks, each question carry 3 marks and 1 mark will be deducted for every wrong answer. It's a 2 hour exam. Those students qualify this phase will be called for interview. Generally number of Candidates called for interview depends on number of vacancies. For every vacancy, they call almost 8 candidates. (Ex: 40 vacancies, then they will call around 320 candidates for interview).
Phase 2: Personal interview is of around 20–30 minutes. They generally ask you about your favorite subjects (at least 4).The interview is fully technical and illustrative. You are asked to explain things on board. (With a black marker and white board). Questions are not too difficult to answer, if you have prepared well, you can answer 60–70 % questions.
All the Best
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