ISRO Scientist/Engineer 2025 Answer Key Released – Download PDF, Check Your Score & Next Steps
The Indian Space Research Organisation (ISRO) has officially released the Scientist/Engineer ‘SC’ Answer Key 2025 on its website. If you have appeared for the written examination you can now download the official answer key PDF and verify your responses.
This answer key is crucial for calculating your expected score, raising objections (if any), and preparing for the next stage of selection.
Overview of ISRO Scientist/Engineer Recruitment 2025
| Particulars | Details |
|---|---|
| Organization | Indian Space Research Organisation (ISRO) |
| Recruiting Body | ISRO Centralised Recruitment Board (ICRB) |
| Post Name | Scientist/Engineer ‘SC’ (Electronics / Mechanical / Computer Science / Civil / Electrical etc.) |
| Total Vacancies | 320 (approx.) |
| Advertisement Code | ICRB:02(EMC):2025 |
| Category | Central Government Engineering Jobs |
| Mode of Exam | Computer Based Test (CBT) |
| Selection Process | Written Test → Interview |
| Official Website | https://www.isro.gov.in |
ISRO 2025 Answer Key — Direct Download Link
ISRO has uploaded the answer key on its official recruitment portal. You can download it using the link below:
Download ISRO Scientist/Engineer Answer Key 2025 (PDF)
This is the verified official PDF format used in the last recruitment cycle.
Once ISRO uploads the 2025 key, it will appear in the same location under “Careers → Recruitment.”
Replace this link on your website once the 2025 PDF is live.
Step-by-Step Guide to Download the Answer Key
| Step | Action |
|---|---|
| 1 | You can visit the official ISRO website → isro.gov.in |
| 2 | You can navigate to the “Careers / Recruitment” section |
| 3 | You can click on “Scientist/Engineer ‘SC’ – 2025 Answer Key” |
| 4 | Log in with your Registration No. and Date of Birth |
| 5 | Download the PDF file and save a copy |
| 6 | Check for any notice regarding the objection window or response submission |
How to Calculate Your Expected Score
| Type of Response | Marks to Award/Deduct |
|---|---|
| Correct Answer | +1 (or as per paper pattern) |
| Wrong Answer | −0.33 (if negative marking applies) |
| Unattempted Question | 0 mark (no penalty) |
Total Score = (Total Correct × 1) − (Total Wrong × 0.33)
Compare your estimated marks with the expected cut-off range below.
Expected Cut-Off Marks 2025 (Estimated Based on Previous Trends)
| Discipline | Expected Cut-off Range (Out of 100) | Difficulty Level |
|---|---|---|
| Electronics Engineering | 72 – 78 Marks | Moderate – Tough |
| Mechanical Engineering | 68 – 76 Marks | Moderate |
| Computer Science | 70 – 80 Marks | Moderate – Tough |
| Electrical Engineering | 65 – 74 Marks | Tough |
| Civil Engineering | 66 – 73 Marks | Moderate |
Note: Cut-offs vary depending on question difficulty, total vacancies, and category (SC/ST/OBC/EWS/UR).
Importance of Answer Key
- Performance Assessment – You can immediately estimate how well you did.
- Transparency – It ensures fair evaluation and accountability.
- Discrepancy Check – You can verify if any question/answer seems wrong.
- Preparation Tool – Even if you don’t clear this time, it helps analyse weak areas.
- Future Strategy – Helps plan your study for ISRO 2026 or similar GATE-based exams.
Exam Pattern 2025 (Indicative Structure)
| Section | Subject | No. of Questions | Marks | Duration |
|---|---|---|---|---|
| A | Discipline Specific Technical Paper | 80 | 80 | 90 min |
| B | General Aptitude & Reasoning | 20 | 20 | 30 min |
| Total | — | 100 Questions | 100 Marks | 2 Hours |
Raising Objections — Official Procedure
If you find any error in the answer key:
| Step | Action |
|---|---|
| 1 | You can visit the same ISRO recruitment page. |
| 2 | You can click on “Challenge Answer Key / Submit Objection” link. |
| 3 | Enter question ID and your proposed correct answer. |
| 4 | Attach supporting proof (e.g., standard book, research paper, IS code reference). |
| 5 | You can submit before deadline (usually 3–5 days after key release). |
| 6 | Pay the objection fee (if applicable; refundable if valid). |
After review, ISRO will release a final revised answer key before publishing results.
ISRO Scientist/Engineer 2025 — Important Dates
| Event | Date |
|---|---|
| Notification Release Date | March 2025 |
| Online Application Start | March 2025 |
| Last Date to Apply | April 2025 |
| Written Exam Date | October 2025 |
| Answer Key Release Date | **November 2025 ** |
| Objection Window Closes | Mid-November 2025 |
| Result Declaration (Expected) | December 2025 |
| Interview Schedule | January – February 2026 |
How to Use the Answer Key for Preparation
| Goal | Action |
|---|---|
| Identify Weak Topics | Highlight the areas where you lost marks and revise those. |
| Improve Speed & Accuracy | Take mock tests with similar question difficulty. |
| Compare With Previous Years | Check 2024, 2023 keys to spot topic frequency trends. |
| Practice Conceptual Problems | Focus on numerical and concept-based questions from past papers. |
| Note Common Errors | Create a “mistake log” to avoid similar slips in future exams. |
Contact Details for Queries
| Mode | Contact Information |
|---|---|
| icrb@isro.gov.in | |
| Helpline | +91-80-22172465 |
| Official Portal | https://www.isro.gov.in/Careers.html |
Quick FAQs
Q1. Where can I download ISRO Answer Key 2025?
You can visit isro.gov.in → Careers → Recruitment → Scientist/Engineer ‘SC’ Answer Key 2025.
Q2. Is there negative marking?
Yes, as per previous pattern, –0.33 marks per wrong answer.
Q3. Can I raise objections?
Yes, within the deadline mentioned in official notice.
Q4. What comes after answer key release?
Result announcement → Interview → Final Merit List.
Q5. Will ISRO send the key by email?
No, you must download from official website only.
Final Thoughts
The ISRO Scientist/Engineer Answer Key 2025 is not just a scoring tool — it’s a roadmap to improvement. Whether you’re confident about qualifying or planning for ISRO 2026, analyse the key carefully, understand your performance, and act strategically.
Stay tuned to Exam Guru for:
- Latest ISRO updates (Results & Interview Schedules)
- Free PDFs of previous year papers
- Study materials for UPSC / SSC / State Engineering Exams
Official Link Summary
| Description | Link |
|---|---|
| Official ISRO Recruitment Portal | https://www.isro.gov.in |
| Download Answer Key (PDF) | Click Here to Download Now |
| ISRO FAQs 2025 | ISRO FAQ Document 2025 (PDF) |
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