ISRO Scientist Engineer Answer Key 2026 Out – Download & Raise Objections

The Indian Space Research Organisation (ISRO) has officially released the ISRO Scientist Engineer Answer Key 2026 on 12 November 2026 at 1:00 PM through its candidate login portal. Candidates who appeared for the Computer Based Test conducted on 29 October 2026 for 175 Scientist/Engineer 'SC' vacancies under Advertisement No. ISRO:ICRB:03(EMC):2026 can now access the provisional Answer Key 2026, review their marked responses, and compare them against the official Solution Key online.

Verifying your answers through the ISRO Scientist Engineer Answer Key 2026 is a decisive step for every aspirant seeking a seat in India's premier space organisation. It enables you to cross-check every response, calculate your expected score with precision, and flag any question where the published solution may be inaccurate. If you discover an error, you have a critical window — until 15 November 2026, 1:00 PM — to raise a formal objection exclusively through the official portal. Objections submitted after this deadline or via any alternative channel will be summarily rejected. Download your response sheet now, verify each answer against the Solution Key, estimate your score, and challenge any disputed entries promptly to safeguard your rightful position in the ISRO Scientist Engineer selection process.

ISRO Scientist Engineer Answer Key 2026 – Key Details at a Glance

Below is a consolidated overview of every essential detail related to the ISRO Scientist Engineer Answer Key 2026 release and the associated objection process:

Vacancy Breakdown Covered by the Answer Key

The ISRO Scientist Engineer Answer Key 2026 covers the CBT conducted for all 175 Scientist/Engineer 'SC' posts across three engineering disciplines:

Direct Download Links for ISRO Scientist Engineer Answer Key 2026

Candidates can use the official links below to access the ISRO Scientist Engineer Answer Key 2026, download their response sheet, and raise objections. Always use these official links to avoid phishing or fraudulent websites:

Note: The login portal requires your User ID and Password along with a captcha displayed on screen. These credentials are the same ones used during the CBT registration process.

How to Download the ISRO Scientist Engineer Answer Key 2026

Follow these straightforward steps to download the ISRO Scientist Engineer Answer Key 2026 and your response sheet:

1. Visit the official ISRO website, isro.gov.in.
2. Open the Careers section from the homepage.
3. Locate the recruitment notice for Advertisement No. ISRO:ICRB:03(EMC):2026.
4. Click on the link titled "Answer Keys and Objections to the Answer Keys".
5. On the login page, enter your User ID, Password, and the captcha code shown on screen.
6. Click Submit to view your question paper, marked responses, and the official answer key side by side.
7. Download and save the response sheet as a PDF for future reference and score calculation.

Pro Tip: Take a screenshot or print of the response sheet immediately. Access to the portal may be restricted after 15 November 2026, 1:00 PM.

How to Calculate Your Score Using the ISRO Scientist Engineer Answer Key 2026

Once you have downloaded the ISRO Scientist Engineer Answer Key 2026, you can calculate your expected score by comparing each of your marked responses with the official Solution Key. Follow this step-by-step method for accurate score estimation:

1. Open your downloaded response sheet alongside the official answer key.
2. Go through every question one by one and mark each as Correct, Incorrect, or Unattempted.
3. Count the total number of correct responses.
4. Count the total number of incorrect responses.
5. Apply the ISRO CBT marking scheme to determine your raw score — refer to the official ISRO CBT guidelines for exact marks per correct answer and any applicable negative marking for this specific advertisement.
6. Compare your estimated score with previous year cut-offs to gauge your qualification chances.

Important: The exact marking scheme (marks per correct answer and negative marking) is specified in the official ISRO recruitment notification for Advertisement No. ISRO:ICRB:03(EMC):2026. Candidates are advised to refer to the original advertisement PDF on the ISRO Careers page for precise scoring details. Always cross-check your self-calculated score with the key before the objection deadline.

How to Raise an Objection Against the ISRO Scientist Engineer Answer Key 2026

If you find any answer in the provisional ISRO Scientist Engineer Answer Key 2026 to be incorrect or misleading, you have the right to challenge it through the official objection window. The objection portal is open from 12 November 2026, 1:00 PM and closes on 15 November 2026, 1:00 PM. Objections must be submitted only through the official online portal.

Step-by-Step Objection Procedure

1. Log in to the official ISRO Answer Key and Objection Portal using your User ID and Password.
2. Open your question paper and the corresponding answer key.
3. Select the specific question number that you believe has an incorrect answer in the key.
4. Enter the answer that you consider correct in the provided field.
5. Attach or cite valid proof — such as a reference textbook, standard engineering handbook, or an authentic document — wherever the portal requires supporting evidence.
6. Review your objection, complete the submission, and save the acknowledgement receipt for your records.

Objection Window Timeline

Important Instructions for Candidates Raising Objections

• Use only the official login link or the ISRO Careers page to access the answer key and objection portal.
• Objections sent via email, post, or any mode other than the official portal will not be accepted.
• Any objection raised after 15 November 2026, 1:00 PM will be rejected outright.
• Download your response sheet before the window closes, as access may be permanently revoked after the deadline.
• Each challenged question must be supported by valid proof or reference as requested by the portal.
• Keep your login credentials safe and never share them with anyone.
• Save the acknowledgement receipt after every submission as proof of your objection.

What's Next After the ISRO Scientist Engineer Answer Key 2026?

After the objection window closes on 15 November 2026, 1:00 PM, ISRO's evaluation cell will review all submitted challenges. If any objections are found valid, the final revised answer key will be published, and scores will be recalculated accordingly. Once the final answer key is confirmed, ISRO will proceed with the following stages:

• Declaration of Results: The ISRO Scientist Engineer CBT result is expected to be released shortly after the final answer key is finalised — candidates should monitor the official ISRO Careers page for updates.
• Shortlisting for Interview: Based on the final answer key and cut-off scores, qualified candidates will be shortlisted for the next round of selection.
• Interview/Personal Interaction: Shortlisted candidates will be called for the interview stage as part of the final selection process.
• Medical Fitness Test: Candidates selected after the interview will undergo a medical examination as per ISRO standards.
• Final Merit List: The final merit list will be prepared based on combined CBT and interview performance.

Keep your login credentials handy and bookmark this page for instant updates on the ISRO Scientist Engineer result, cut-off marks, and interview schedule.

ISRO Scientist Engineer Answer Key 2026 – Important Links

FAQs – ISRO Scientist Engineer Answer Key 2026

1. When was the ISRO Scientist Engineer Answer Key 2026 released?

The ISRO Scientist Engineer Answer Key 2026 was released on 12 November 2026 at 1:00 PM through the official candidate login portal on the ISRO website.

2. How can I download my ISRO Scientist Engineer Response Sheet 2026?

You can download the ISRO Scientist Engineer Response Sheet 2026 by visiting isro.gov.in, navigating to the Careers section, finding Advertisement No. ISRO:ICRB:03(EMC):2026, clicking the Answer Key link, and logging in with your User ID and Password.

3. What is the last date to raise objections against the ISRO Answer Key 2026?

The deadline to raise objections against the ISRO Scientist Engineer Answer Key 2026 is 15 November 2026, 1:00 PM. Objections submitted after this time through any mode will not be accepted.

4. How many vacancies does the ISRO Scientist Engineer Answer Key 2026 cover?

The answer key covers 175 Scientist/Engineer 'SC' vacancies across three disciplines — Electronics (100), Mechanical (53), and Computer Science (22).

5. Is there a fee for challenging the ISRO Scientist Engineer Answer Key 2026?

Any applicable objection fee details are specified in the official recruitment notification for Advertisement No. ISRO:ICRB:03(EMC):2026. Candidates are advised to check the official ISRO Careers page or the objection portal for the exact fee structure before submitting challenges.

6. What credentials are needed to access the ISRO Answer Key 2026?

To access the ISRO Scientist Engineer Answer Key 2026, candidates need their User ID and Password — the same credentials used during CBT registration — along with a captcha code displayed on the login screen.

7. Will I get access to the response sheet after the objection window closes?

Access to the response sheet and answer key may be restricted or permanently revoked after 15 November 2026, 1:00 PM. It is strongly recommended to download and save your response sheet as a PDF before the deadline.

8. What happens after objections are submitted for the ISRO Answer Key 2026?

After the objection window closes on 15 November 2026, ISRO will review all valid challenges. If any objections are accepted, a revised/final answer key will be published, after which results will be declared and shortlisted candidates will proceed to the interview stage.