As per the official notification, candidates will be selected based on a Written Test and a Skill Test. The written test will be of 90 minutes duration and will be conducted first. It will consist of 80 multiple-choice questions carrying one mark for each correct answer. 📝 ISRO Recruitment 2023: Vacancies Notified for 35 Technician 'B' and Draughtsman 'B' Posts, Apply Online at isro.gov.in.