The Indian Space Research Organisation (ISRO) has released the ISRO Assistant & UDC Final Answer Key 2026 for candidates who appeared in the Computer-Based Test (CBT) conducted on 21 September 2026. The revised answer key is available on the official ISRO recruitment website under Advertisement No. ISRO:ICRB:01(A-JPA):2026.
Candidates can download the Assistant/Upper Division Clerk (UDC) revised answer key PDF to check the changes made to the provisional answers. ISRO has also activated the final/revised response sheet facility through its candidate login portal. According to the official notice, the response sheet link will remain available from 27 October 2026 at 1:00 PM until 2 November 2026 at 1:00 PM.
Candidates should note that ISRO has stated that no further objections or queries will be entertained regarding the final/revised answer key and response sheet. Candidates shortlisted for the next stage should also check the official skill test and document-verification instructions.
ISRO Assistant & UDC Final Answer Key 2026 – Overview
| Particulars | Details |
|---|---|
| Organisation | Indian Space Research Organisation (ISRO) |
| Recruitment Board | ISRO Centralised Recruitment Board (ICRB) |
| Post Names | Assistant and Upper Division Clerk (UDC) |
| Advertisement Number | ISRO:ICRB:01(A-JPA):2026 |
| Examination Mode | Computer-Based Test (CBT) |
| Exam Date | 21 September 2026 |
| Answer Key Type | Final/Revised Answer Key |
| Answer Key Status | Released |
| Notice Date | 27 October 2026 |
| Response Sheet Status | Available during the notified window |
| Response Sheet Window Opens | 27 October 2026, 1:00 PM |
| Response Sheet Window Closes | 2 November 2026, 1:00 PM |
| Further Objections | Not accepted |
| Next Stage | Skill Test and document verification, as applicable |
| Skill Test Date | 1 November 2026 |
| Official Website | https://www.isro.gov.in/ |
ISRO Assistant & UDC Final Answer Key 2026 PDF Download Link
ISRO has published the revised answer key in PDF format. Candidates can use the direct official link below to open the Assistant/UDC document.
| Resource | Link |
|---|---|
| Assistant/UDC Revised Answer Key PDF | Download Answer Key PDF |
| Final/Revised Response Sheet Login | Open Candidate Login Portal |
| Official ISRO Recruitment Notice | Visit ISRO Assistant & UDC Recruitment Page |
| ISRO Careers Page | Visit Official Careers Website |
Important: The public revised answer key PDF and the individual response sheet are different. The PDF displays revised answers, while the response sheet facility allows candidates to access their individual examination records through the login portal.
ISRO Assistant & UDC Revised Answer Key 2026 – Latest Update
The revised answer key notice relates to the Computer-Based Test held on 21 September 2026 for the Assistant, UDC, Junior Personal Assistant and Stenographer recruitment under the same advertisement.
The Assistant/UDC document contains the provisional answers alongside the revised answers. It also identifies questions for which the answer key has been revised or the question has been excluded.
Candidates should open the PDF and compare the relevant entries carefully. Do not assume that every answer has changed or that the revised key necessarily increases every candidate’s score.
Important points to remember
- The revised answer key was published on the official ISRO website.
- The Assistant/UDC PDF is separate from the JPA/Stenographer PDF.
- The CBT was conducted on 21 September 2026.
- The final/revised response sheet facility has a limited access window.
- ISRO has stated that further objections or queries about the final/revised key and response sheet will not be entertained.
- Candidates should check the separate skill-test shortlist and zone-wise instructions if they are eligible for the next stage.
ISRO Assistant & UDC Final Answer Key 2026 – Important Dates
| Event | Date |
|---|---|
| Computer-Based Test | 21 September 2026 |
| Initial response sheet and objection portal | 25–28 September 2026 |
| Revised answer key notice | 27 October 2026 |
| Final/revised response sheet access begins | 27 October 2026, 1:00 PM |
| Final/revised response sheet access closes | 2 November 2026, 1:00 PM |
| Skill Test | 1 November 2026 |
Candidates should follow the dates and instructions displayed on the official ISRO recruitment page. The response sheet access window and skill-test date overlap, so candidates should not delay checking the portal or preparing for the next stage.
How to Download ISRO Assistant & UDC Final Answer Key 2026
Follow these steps to download the revised answer key PDF:
- Visit the official ISRO recruitment page at https://www.isro.gov.in/ICRB_Recruitment11.html.
- Locate the recruitment notice for Assistant, Junior Personal Assistant, Upper Division Clerk and Stenographer posts.
- Find the section titled REVISED ANSWER KEYS.
- Click the Assistant/UDC PDF link.
- Open the PDF in your browser or PDF reader.
- Check the revised answers against the question numbers shown in the document.
- Download or save a copy of the PDF for your records.
Candidates can also use the direct official PDF link provided in the Important Links section above.
How to Download ISRO Final/Revised Response Sheet 2026
The response sheet is accessed separately through the candidate login portal. Follow these steps:
- Open the official candidate portal: https://cdn.digialm.com/EForms/configuredHtml/1258/101396/login.html.
- Enter the credentials requested by the portal.
- Sign in and locate the final/revised response sheet facility.
- Open the response sheet available for your examination.
- Review the recorded responses and the information displayed on the portal.
- Download or save a copy if the portal provides the option.
- Keep the document for your recruitment records.
The official notice specifies that the portal will remain live from 27 October 2026 at 1:00 PM to 2 November 2026 at 1:00 PM. Candidates should access it within this period.
Difference Between the Revised Answer Key and Response Sheet
Candidates should understand the difference between these two documents before checking their examination records.
| Document | What It Contains |
|---|---|
| Revised Answer Key | The revised official answers, including changes or excluded questions where applicable |
| Individual Response Sheet | The candidate’s recorded responses and other examination details made available through the login portal |
| Skill Test Shortlist | The list of candidates shortlisted for the next stage, usually organised by post or zone |
| Final Selection Result | The outcome issued after the applicable selection and verification process |
Downloading the revised answer key does not automatically mean a candidate has qualified for the skill test or received final selection.
Can Candidates Raise Objections Against the ISRO Final Answer Key 2026?
No further objections or queries regarding the final/revised answer key and response sheet will be entertained, according to ISRO’s official notice.
The initial response sheet and objection portal was open from 25 September 2026 to 28 September 2026. The current notice concerns the final/revised key and response sheets after consideration of the objections received.
Candidates should read the official notice for the precise conditions and should not pay unofficial websites or agents claiming to provide another objection opportunity.
ISRO Assistant & UDC Skill Test 2026
ISRO’s recruitment page lists 1 November 2026 as the skill-test date for this recruitment. Candidates shortlisted through the CBT should check the relevant post-wise and zone-wise shortlist.
The official notice also contains updated document-verification arrangements. For zones other than Hassan and New Delhi, verification is arranged before the skill test on 31 October 2026 and/or after the test on 1 November 2026.
Candidates who cannot complete document verification on 31 October may be allowed to attend the skill test on 1 November after submitting the prescribed undertaking, subject to the official conditions. Verification in those cases is to be taken up after the skill test.
Candidates must read the instructions applicable to their own zone before travelling. Do not assume that the same verification arrangement applies to every location.
How to Check the ISRO Assistant & UDC Skill Test Shortlist
Candidates can follow these steps:
- Visit https://www.isro.gov.in/ICRB_Recruitment11.html.
- Find the section titled “List of candidates short-listed for Skill Test”.
- Locate the PDF matching your post and zone.
- Open the relevant PDF.
- Search for your roll number using Ctrl + F on a computer or the PDF search option on a mobile device.
- Read the document-verification and skill-test instructions carefully.
- Download the relevant notice and keep it for future reference.
A candidate should confirm both the post and zone before relying on any shortlist.
Important Instructions for Candidates
- Download the Assistant/UDC answer key rather than the separate JPA/Stenographer document.
- Use the official ISRO website for recruitment notices and updates.
- Access the individual response sheet through the official candidate portal within the specified period.
- Remember that no further objections or queries will be accepted regarding the final/revised key and response sheet.
- Check the skill-test shortlist separately from the answer key.
- Follow the document-verification instructions for your particular zone.
- Keep copies of the answer key, response sheet and any applicable recruitment documents.
- Do not rely on unofficial claims that the final result or appointment is guaranteed by appearing in a shortlist.
ISRO Assistant & UDC Final Answer Key 2026 – Frequently Asked Questions (FAQs)
1. Has ISRO released the Assistant & UDC Final Answer Key 2026?
Yes. ISRO has published the revised answer key for Assistant/UDC under Advertisement No. ISRO:ICRB:01(A-JPA):2026.
2. Where can I download the ISRO Assistant & UDC answer key PDF?
You can download it from the official PDF link: https://www.isro.gov.in/media_isro/pdf/recruitmentNotice/2026/Oct/Assistant_UDC_Revised_answer_key_27102026.pdf
3. What was the ISRO Assistant and UDC exam date?
The Computer-Based Test was held on 21 September 2026.
4. When was the revised answer key released?
The official recruitment page lists the revised answer key notice dated 27 October 2026.
5. What is the advertisement number for this recruitment?
The advertisement number is ISRO:ICRB:01(A-JPA):2026.
6. Is the final answer key available in PDF format?
Yes. The Assistant/UDC revised answer key is available as a PDF on the official ISRO website.
7. How can I check my individual response sheet?
Open the official candidate login portal, sign in using the requested credentials and follow the instructions for the final/revised response sheet.
8. What is the last date to access the final/revised response sheet?
The notified access period ends on 2 November 2026 at 1:00 PM.
9. When did the final/revised response sheet link open?
The official notice gives 27 October 2026 at 1:00 PM as the opening time.
10. Can I raise a new objection against the revised answer key?
No. ISRO’s notice states that no further objections or queries regarding the final/revised answer key and response sheet will be entertained.
11. Is the Assistant/UDC answer key the same as the JPA/Stenographer answer key?
No. ISRO provides separate revised answer key PDFs for Assistant/UDC and JPA/Stenographer posts.
12. Does the revised answer key include changes to answers?
The PDF lists provisional answers alongside revised answers and identifies questions that have been excluded where applicable.
13. Does downloading the answer key mean I have qualified?
No. The answer key is for checking revised answers. Candidates should consult the official skill-test shortlist and recruitment instructions to determine their status.
14. When is the ISRO skill test scheduled?
The recruitment page lists 1 November 2026 as the skill-test date.
15. Where can I check the skill-test shortlist?
Visit the official ISRO recruitment page and find the zone-wise list of candidates shortlisted for the skill test.
16. Is document verification required?
Candidates should follow the document-verification instructions applicable to their post and zone. The official notice explains the revised verification arrangements.
17. What should I do if I cannot open the response sheet portal?
Check the official notice, confirm that you are accessing the portal during the notified window and use the credentials requested by the system. If access problems continue, consult the official recruitment page for assistance or updates.
18. Can I download the answer key on a mobile phone?
Yes. Open the official PDF link in your mobile browser and use the download or save option available on your device.
19. Where can I find the latest ISRO Assistant and UDC recruitment updates?
Visit https://www.isro.gov.in/ICRB_Recruitment11.html for official answer keys, response-sheet information, skill-test shortlists and other recruitment notices.
20. Has ISRO declared the final appointment result through the answer key notice?
The revised answer key notice is not itself a final appointment result. Candidates should monitor the official recruitment page for further selection-stage updates.