Hey,

Following is the application process for isro exam-

Step 1: Visit the official website of ISRO: isro.gov.in.
Step 2: Scroll down and click on “Career” in the bottom right side the page.
Step 3: Click on “Centralised Recruitment (ICRB), All location.”
Step 4: Now click on “Recruitment of Scientist/Engineer ‘SC’.”
Step 5: Next, click on “Click here to apply.”
Step 6: Click on the link for the post you want to apply for.
Step 7: Register for the exam by entering your “Personal” or “Contact”details.
Step 8: You will receive your Registration ID and Password on the given email ID and mobile number. Now use the Registration ID and Password to login.
Step 9: Enter your “Personal”,  “Educational”  and “Residential”information.
Step 10: Upload your scanned  “Photograph”  and “Signature.”
Step 11: Now proceed to pay the application fees.
Step 12: Take a print out of the form for future reference.

Hope this helps.