Academic snapshot
Marks: 65% or 6.5 CGPA throughout 10th, 12th, graduation
Degree: B.E. / B.Tech / M.E. / M.Tech / M.Sc as listed
Backlogs: None active on most ads
Age: Per notification (often ~35 + relaxations)
ISRO Placement Papers 2026
ISRO is India’s national space agency, founded in 1969 and headquartered in Bengaluru, responsible for satellite launches and space exploration missions. Fresh engineering graduates typically join as Scientist/Engineer SC through the ICRB recruitment exam, working on rockets, satellites, and deep space programs.
Explore: Online Assessment · Download PDF · Placement Process · Interview Experience · Preparation Guide · Certifications & Career
ISRO fresher eligibility for campus drives
ISRO is not a campus HackerRank drive. The printed floor is often 65% throughout. The real cut is a hard discipline written, then a multi-member panel.
Who this hub is for
- For: Students targeting Scientist/Engineer SC (and related engineer posts) on official notifications.
- Not the same track: JRF/RA fellowships (separate ads), technician/draughtsman posts, experienced scientist lateral hires.
- CSE vs ECE vs Mech: All appear when listed. CSE panels still grill OS/DBMS/networks and a project. ECE still sits signals/comms/control. A space hobby does not replace that.
On-campus vs ICRB vs fellowships
| Route | What usually changes | What stays the same |
|---|---|---|
| ICRB SC notification | National written + interview | Core depth |
| Campus talk / MoU | Awareness only on most colleges | You still sit the national paper |
| JRF / RA | GATE/NET/PhD rules | Different pay and tenure |
Off-campus here means the official website, not Naukri easy-apply. A college PPT is not an offer.
Degree, 6.5, and “is 6.5 enough?”
Is 6.5 CGPA enough? It matches the commonly reported floor. Selection still hinges on written rank and the panel. A 6.7 who can derive on a board beats a 9.2 who only memorised Chandrayaan dates.
Branches: As listed: Electronics, Mechanical, CS, Electrical, Civil, Aerospace, some science degrees. The PDF is the list.
Age: Often up to 35 with relaxations. Read the ad.
Gaps and backlogs: Active backlogs are a usual blocker. Medicals exist.
What helps: GATE-depth notes, one project with a diagram, mission literacy you can defend. See certifications after the written syllabus, not instead of it.
Skills they actually filter
Written: Discipline technical + some aptitude/space
Panel: Derivations, project, fundamentals
Coding: Role-dependent, not the SC default bar
Tools: C/Python/MATLAB helpful
Academic floor students usually see
| Item | Typical expectation (candidate-reported) | Reality check |
|---|---|---|
| Graduation | 65% or 6.5 | Notification wins |
| 10th & 12th | Often same throughout rule | Keep scans |
| Discipline | As advertised | No “any branch” fantasy |
| Backlogs | None active | Confirm ad |
| PhD | Research posts, not default SC | Separate ad |
Who usually fits and who struggles
Good fit: You like hard fundamentals, you will relocate to a centre, and you will put months into a written paper.
Harder path: You only grind LeetCode; you recite missions you cannot explain; you want a 25 LPA product title; you refuse every centre except one city.
ISRO placement papers - last few years
Download 2026 ISRO placement papers
2026 in detail
2025 placement papers
2024 placement papers
Previous year question papers
Comments & Suggestions
What ISRO previous year papers actually train
ISRO publishes official notifications and, at times, previous question flavour through student memory. Papers on this site are pattern trainers. Official previous papers and GATE-depth core are the real volume.
| Round (typical) | What to practice |
|---|---|
| Written / CBT | Discipline MCQs, negative marking, some aptitude/space |
| Panel | Project + board derivations + fundamentals |
| HR slice | Why ISRO, centre, integrity |
| Medicals / docs | Throughout % and fitness |
Themes that keep repeating (2024-2026)
- Written as the volume filter: student maps of 80-100 questions, ~90 minutes, 0.25 negative, ~15-20% written pass rumours.
- Scientist/Engineer SC Bengaluru (GFG, Aug 2024): DV on 11 August, interview 12 August. “Approximately 30 students were called for the interview on that day.” One interview started 12:30 and lasted about 25 minutes. Multi-member panel: OS/DBMS/networks/security, B.Tech project grill, whiteboard derivations.
- 2024-2025 question colour: recent missions (Chandrayaan-3, Aditya-L1) appear as awareness, not as a replacement for core.
- 2026 prep expectation: Gaganyaan literacy at fresher depth is fine. A fake human-spaceflight internship is not. Core written still decides whether you see the panel.
How to use one paper set in a single sitting
- Timed: 90 minutes, negative-marking rules, no phone.
- Untimed: rewrite every guessed core item with a one-line reason.
- One 20-minute project board (block diagram + one equation).
- Five mission facts you can explain, not list.
- One aptitude sectional if your paper includes it.
Related drills
| Theme | Drill next | Why ISRO asks it |
|---|---|---|
| GATE-depth core | Official PYQs in your paper | Written |
| OS/DBMS/CN (CS) | Board explanations | 2024 Bengaluru panel |
| Signals/control (ECE) | One derivation | Electronics SC |
| Thermo/structures (Mech) | Sketch + assumption | Mechanical SC |
| Mission literacy | PSLV vs GSLV in your words | Panel curiosity |
ISRO placement process, round by round
ISRO hires through isro.gov.in notifications, not a standing campus OA. After eligibility, the shape is government science: written, panel, medicals.
Application methods
Official notification
Apply on isro.gov.in. Download the PDF. Note exam city and discipline code.
Campus awareness
Useful for dates. Not a backdoor.
Research fellowships
JRF/RA have different bars and pay. Do not mix with SC prep.
1. Eligibility / application
65% / 6.5 throughout when printed, listed discipline, age, nationality rules. Gate.
2. Written examination (~90 min on many maps)
Student-reported working map:
| Section (typical) | Questions (reported range) | Time feel | Focus |
|---|---|---|---|
| Technical (discipline) | 50-60 | ~60 min | Core engineering |
| General aptitude | 20-25 | ~20 min | Quant, logic, verbal |
| Space awareness (some) | 10-15 | ~10 min | Missions, launchers, satellites |
Pass habit: 0.25 negative means skip guesses that are worse than 25%. Student rumours: 15-20% written pass. Your notification wins.
3. Technical panel (~25-45 min)
Multi-member. Project first. Then fundamentals on a board. CS example: OS, DBMS, networks, security. ECE/Mech: branch core + application. They grade whether you think, not whether you memorised a mission list.
Pass habit: derive. If you forget, say the next equation you would write. Fake confidence on a wrong Kepler number is worse than “I will set it up this way.”
4. HR / personality (often same day, shorter)
Why ISRO, centre, joining, integrity. Know Level 10 basics. Do not quote a 30 LPA product CTC.
5. Medicals and offer
As per ad. Centre on the letter.
Timeline from application to offer
| Phase | Typical duration | Notes |
|---|---|---|
| Application window | Weeks | Official site |
| Written | 1 day | Centres or CBT |
| Result | 1-3 weeks (varies) | Shortlist for interview |
| Panel | 1 day (slots) | ~30 called in one Bengaluru note |
| Offer / medicals | Weeks | Letter wins |
| End to end | Often 4-8+ weeks after written | Not a 2-week IT OA |
Board habit (the explanation people skip)
A project is not “I used Python.” Say: input → processing → output → what breaks. Interviewers want the chain. Silent “it worked in the lab” is the fail.
CS example: web app → sessions → SQL injection risk → what you actually sanitised. ECE example: filter → transfer function → one pole you can sketch. Mech example: heat sink → conduction path → one assumption.
Weekend mock
Saturday 10:00: 90-minute discipline paper with negative marking.
Saturday 12:00: rewrite five concept misses.
Saturday 16:00: 25-minute board project.
Sunday 11:00: five mission explanations in your words.
Sunday 12:00: why-ISRO and centre yes/no.
Two weekends of that beat a mission-trivia binge.
Documents pack
10th, 12th, degree, ID, category certificates if any. Throughout 65% means the 12th PDF matters.
How interviews get scheduled
Written result → slot mail → DV morning, panel afternoon (as in the 2024 Bengaluru note) or similar. Screenshot the admit card. If the ad never mentioned coding contests, do not panic-build LeetCode 300. If it named Electronics, do Electronics.
After a written mock, the only review that matters
Pick the five technical items you guessed. Rewrite the assumption. Speak one derivation to a wall. Re-reading 40 mission FAQs you already “know” is how people feel busy and still fail networks or thermo.
Whiteboard starter kit
Carry a habit, not a marker. Every mock, start with:
- Restate the question in one line.
- Draw the diagram or write the knowns.
- Write the first equation or the first API.
- Check units or complexity.
- State the limitation.
That sequence is what a 25-minute panel can grade. A speech about “passion for space” cannot.
JRF vs SC (do not mix the PDFs)
SC is a regular scientist/engineer post with Level 10 pay. JRF is a fellowship with a stipend and usually a GATE/NET/PhD bar. Preparing a JRF statement of purpose for an SC written is wasted motion. Read the post name twice.
How “research” actually shows up for B.Tech SC
They are not hiring you as a PI. They are hiring someone who can learn a subsystem and not freeze on fundamentals. A B.Tech project with a measurement is enough. A fake arXiv paper is worse than none. If you have a conference poster, say what you personally did.
Funnel: 30 called in a day
One Bengaluru note: about 30 students interviewed that day, 25 minutes each. You cannot charm the written cutoff. You can make sure a board story exists before the 30 become offers without you.
Written week plan if the admit card is already out
Day 1-3: only your weakest core subject, timed 30-minute slices.
Day 4-5: full 90-minute mixed paper, negative marking on.
Day 6: project board + five mission sentences.
Day 7: light formula sheet, sleep, travel plan for the centre.
Do not start a new textbook on day 6. Do not debate exam-city politics on Telegram until 1 a.m. The written does not care. The 15-20% who pass mostly slept.
What not to tell the panel
- That you will leave for a 30 LPA product job in 18 months
- That you “don’t like hardware” when applying Electronics SC
- That you copied the project and cannot derive it
- That you will only join Bengaluru
Any one of those can end a 25-minute slot early. Honesty about a gap or a weak elective is recoverable. Integrity fails are not.
Travel and DV day
Admit card, photo ID, and the certificates the PDF listed. Reach the city the night before if the centre is not local. A 25-minute panel after an overnight bus is how people blank a handshake they have drawn ten times. Eat. Carry a print of the project block diagram if it helps you start writing faster. Do not carry a cheat sheet you would be embarrassed to have fall out. If DV is the morning before the panel, keep copies ordered: 10th, 12th, degree, ID, category if any. A missing 12th marksheet is a dumber fail than a hard networks question.
Where to practise for ISRO
Pair them with official papers.
Online assessment
Written/OA format, timing, and question types.
Coding questions
C/Python practice for CS-flavoured panels.
Aptitude / mock quiz
Quant, logic, and timed mock quiz.
Interview experiences
Candidate stories and round notes.
HR interview questions
Common HR questions, sample answers, STAR tips.
Week-by-week prep
Study plan and round-by-round strategy.
Where your ISRO prep time should go
If a ISRO invite is 3-8 weeks out, treat this hub as the map and the linked practice pages as the drills. Do not reread eligibility ten times. Check the JD once, then spend hours on the filter that actually rejects people.
Typical fresher CTC chatter for ISRO sits around ₹8-12 LPA (candidate-reported - confirm the letter). Languages students mention most often: C++, Python, C, Go. Pick one and stay with it in OA and interviews.
Eligibility reminder (from student reports): Candidate-reported floor is often 65% or 6.5 CGPA across 10th, 12th, and graduation. Degrees commonly listed: B.E./B.Tech/M.E./M.Tech/M.Sc in the advertised discipline (Electronics, Mechanical, Computer Science, Electrical, Civil, Aerospace, and sometimes Physics/Chemistry). Age typically 18-35 with GoI relaxations. No active backlogs. Research fellow posts may need NET/GATE/PhD as per that ad. Verify isro.gov.in.
What you are training for: Scientist/Engineer SC usually: apply on the official notification → written/CBT (discipline paper, often with negative marking) → interview (multi-member panel, ~25-45 min) → medicals and offer. Some notes mention a short HR/personality slice the same day. Timeline is often weeks to months, not a 2-week campus OA. Campus awareness sessions do not replace ICRB.
Short version of the prep split: Split time roughly 50% core engineering (GATE depth), 20% ISRO/space literacy at fresher level, 15% aptitude if the paper includes it, 15% panel talk (project + derivations on a board). Full plan: /isro/preparation-guide/.
A four-week plan that actually gets used
Week 1 - pattern, not vibes. Language fluency: rewrite 10 old solutions in one language until you stop hunting syntax. Open the ISRO previous-year sets on this site and mark which sections ate your time. Write the timing on a sticky note. That number is more useful than a 200-problem LeetCode streak you never timed.
Week 2 - the steep filter. Most ISRO drives fail people on the first timed paper or OA. Do three timed sits this week. After each one, log every miss in a two-column note: topic and why (slow, wrong formula, bad edge case, panic). The next sit should only add problems from that log.
Week 3 - talk tracks. Technical interviews at ISRO usually want a clean project story, one or two CS fundamentals, and (if the process has it) a behavioral or values round. Write STAR stories on paper, not in your head. Practise “Why ISRO?” with one concrete product, lab, or business line - not a slogan.
Week 4 - mocks and logistics. Sleep, id photocopies, and a dry run of the oa platform if the invite names one. If you still have energy, redo only the questions you failed in week 2.
Where the hours should go
| Slice | Share of weekly hours | What “done” looks like |
|---|---|---|
| Timed papers / OA | ~40% | You finish a ISRO-style sit without guessing the clock |
| Coding / role technical | ~30% | You can explain a solution out loud in your chosen language |
| Fundamentals / domain | ~20% | You can teach one OS/DBMS/networks (or domain) topic to a friend |
| Stories + HR | ~10% | Two STAR stories and a specific Why-this-company answer |
If you only have 10 days, keep the same ratios and cut volume, not the timed sits.
Practice pages to open this week
- OA / assessment notes
- aptitude mock quiz
- coding question bank
- interview experiences
- HR question bank
- week-by-week guide
- previous year papers
- 2026 paper page
Use this hub for the ISRO story (eligibility, rounds, salary). Use those pages for timed reps and interview notes.
Common ways students waste a month
- Collecting 12 ISRO PDFs and never sitting one under a timer.
- Switching languages every weekend because a senior used a different one.
- Memorising HR answers before they can finish the OA.
- Ignoring the company-specific quirk on this page (unique round, exam name, or role band) and preparing like a generic service-company drive.
If you do one thing after reading this: schedule three timed ISRO papers on three different days, then interview prep on the leftovers.
How to train for ISRO written and scientist panels
Week calendars live on the preparation guide. This H2 is the focus split.
Time split
| Bucket | Share | What “done” looks like |
|---|---|---|
| Core written | ~50% | Timed papers, error log |
| Space literacy | ~20% | Five missions you can explain |
| Aptitude (if in paper) | ~15% | Accuracy under negative marking |
| Panel + centre | ~15% | 25-minute board + city yes |
If you are CSE who only codes, stop LeetCode for two weeks and sit OS/DBMS/CN at GATE depth. If you are ECE who only reads ISRO tweets, add control systems and communications PYQs.
This week
- One timed written mock.
- Five concept rewrites.
- One project board.
- Three mission explanations in your words.
- Centre yes/no on paper.
What not to waste time on
- Memorising 100 mission dates without a mechanism
- Staff-level orbital mechanics the night before an Electronics paper
- Quoting 30 LPA in the panel
- A fake ISRO internship
- Ignoring negative marking
Two-week focus if the interview call is out
Week A: daily 45-minute core; one board session.
Week B: two full 30-minute mocks with a friend who interrupts; why-ISRO recorded twice; documents scanned.
How to say “why ISRO” without a brochure
You want to apply your discipline to launchers, satellites, or applications. You will go to the centre on the letter. You know Level 10 is not a product ESOP. That is enough. “I have always dreamt of the stars since childhood” only works if you can also derive.
Written types worth a month, not a lifetime
You do not need every elective. You need representatives:
- Your GATE core four subjects
- One numerical type you always miss
- Aptitude accuracy
- Five space items (launcher classes, one orbiter, remote sensing vs comms)
- One security or reliability idea for CS/ECE
For each type, do three timed, then explain one to a roommate in 90 seconds.
Night-before checklist (panel day)
- Certificates, ID, project printout
- One derivation you can restart from zero
- Five honest mission sentences
- Centre yes
- Sleep. Morning freeze on a board is how a 25-minute slot ends at minute eight
What ISRO hiring means
ISRO is not trying to be TCS and not trying to be Google. The written brand is real. The 25-minute Bengaluru panel is also real. You can be CS or Mechanical; both still have to derive. You cannot outsource fundamentals to a dump PDF. You cannot skip the written because a senior said “they only care about passion.” Read your advertisement. Then practise both.
If ISRO, DRDO, and NTPC all land the same season, compare centre vs plant vs lab, exam path, and the letter. Do not pick on brand memory from a 2014 news clip.
Negative-marking habit
If 0.25 is printed, a random guess among four options is negative EV. Skip when you cannot eliminate two choices. Students who “attempt all 100” to look hardworking donate marks. Mark for review only if the interface allows going back. Some CBTs do not.
How to use GATE notes without sitting the wrong exam
ISRO written is not GATE. It often rhymes. Use GATE PYQs for depth. Then sit ISRO-style timed papers for flavour and negative marking. Do not skip ISRO space-awareness items because “GATE does not ask them.” Do not skip GATE-depth control systems because “ISRO only asks missions.”
Centre list you should already have thought about
Bengaluru, Thiruvananthapuram (VSSC), Sriharikota (SHAR), Ahmedabad (SAC), and others appear in student talk. You will not pick like a private-job location preference form. You will say whether you will join the centre on the letter. If you cannot leave your state, this may not be your organisation. Decide before the written fee, not after a 25-minute panel you are proud of.
ISRO compensation & benefits
Figures below mix pay-matrix facts and candidate-reported all-in totals (as of August 2026).
| Track | Typical pay | Notes |
|---|---|---|
| Scientist/Engineer SC | Level 10 basic ₹56,100; ₹8-12 LPA all-in in student notes | DA/HRA extra |
| Junior Research Fellow | ₹31,000-35,000 / month | Separate ad |
| Research Associate | ₹47,000-54,000 / month | Usually PhD |
| Technician / SA (indicative) | Lower bands | Diploma/B.Sc posts |
Confirm the written offer. Centre HRA changes the take-home.
Benefits students actually care about
Medical, leave, pension/NPS as applicable, training, mission work, government stability. Ask HR about centre. Do not assume only Bengaluru.
How to talk pay in the panel
Know Level 10 exists. Do not negotiate like a startup. One calm question on posting beats a CTC argument.
Offer-stage discipline
- Read centre
- 10th/12th/degree % must match
- Written shortlist is not an offer PDF
- Medicals can still stop a joining
ISRO hiring updates for 2026
- Written remains the door. Online vs pen-paper varies by drive.
- Panels still grill fundamentals (2024 CS note: OS/DBMS/CN + project + board).
- Mission literacy updated (Chandrayaan-3, Aditya-L1, Gaganyaan) but does not replace core.
- Level 10 pay is the SC story; confirm allowances on the letter.
- Timeline is slower than IT OAs. Plan months, not a weekend crash.
Net for 2026: do not prepare as if this were Infosys or a marketplace SDE loop. Sit the paper. Own a board.
Centres (why the letter wins)
Bengaluru is HQ and a common interview city. Joining can be another centre. Write a yes/no this week. Students who “will decide after the offer” stall joining.
How to read an ISRO advertisement in 15 minutes
- Post code (SC vs technician vs JRF).
- Discipline and essential qualification.
- % / CGPA / age / nationality.
- Exam mode, marks, negative marking.
- Interview city vs joining centre (they can differ).
- Medicals and bond if named.
If the PDF and a coaching poster disagree, the PDF wins. Students who prepare “ISRO GK” from 2018 booklets and skip their branch paper are the 80% who never see the 25-minute slot.
What “Scientist/Engineer SC” actually means on day one
You will not command a launch. You will join a division, learn a subsystem, write notes, test, and sit reviews. The panel is checking whether you can learn. A B.Tech who can derive is more useful than a brochure reciter. That is why OS/DBMS showed up for a CS candidate in Bengaluru. Space literacy is the seasoning. Fundamentals are the meal.
Aptitude without stealing technical time
If the paper has 20 aptitude items, they are a bonus you should not fail, not a section to “max.” Spend your first 60 minutes on technical. Come back. Guessing the last five verbal items under 0.25 is how people donate marks they earned on control systems. Practise a 15-minute aptitude sectional once a week, not a 3-hour CAT course.
Board mock with a friend who is not in your branch
Explain your project to a Mechanical friend if you are CS (or the reverse). If they cannot follow the diagram, the panel will not either. Jargon that only your lab partner knows is a fail. Plain boxes and one equation are a pass. Do this twice before the slot. It is cheaper than a paid mock and closer to a multi-member room. Record one 25-minute session on your phone. Watch where you stall. Those stalls are the only syllabus that matters the night before. If you stall on the first equation, write the knowns anyway. A panel can coach a started derivation. They cannot coach a blank board and a speech about missions.
ISRO placement FAQs
Papers & process
Can I download ISRO placement papers PDF for free?
Yes. Start with the 2026 PDF or the archive. Pair with official previous papers.
What is the ISRO placement process for freshers?
Typical SC path: official apply → written/CBT → panel interview → medicals. Often 4-8+ weeks after the written, not a 2-week campus OA.
How many rounds does ISRO usually have?
Written plus one substantial panel (HR often same day). Count the notification.
What is the exam pattern?
Student-reported ~90 minutes, 80-100 items, heavy technical, some aptitude/space, often 0.25 negative. Details: online assessment.
Eligibility & offer
What eligibility / CGPA do fresher drives usually expect?
Commonly 65% or 6.5 throughout; advertised discipline; age per ad; no active backlogs. Your PDF wins.
What is ISRO fresher salary in India?
SC is Level 10 (₹56,100 basic). Student-reported all-in often ₹8-12 LPA (as of August 2026). The written offer is the only number that matters.
Which branches are eligible?
Those listed on the advertisement: often ECE, Mech, CS, EE, Civil, Aerospace, some M.Sc. Not “any branch.”
Prep & ISRO-specific
How should I prepare?
Roughly 50% core written, 20% space literacy, 15% aptitude, 15% panel. Guide: preparation guide.
Do I need a space project?
No. You need a real B.Tech project you can derive, plus honest mission literacy.
What languages help?
C/C++, Python, MATLAB depending on role. Core written still comes first.
ISRO vs DRDO vs NTPC?
ISRO is space centres via ICRB. DRDO is defence labs. NTPC is plant ET via GATE. Compare posting and the letter.
Any pro tip that actually changes outcomes?
Sit the written like GATE. Then own a 25-minute board. Do not memorise a mission brochure you cannot defend.
Where can I read real interview experiences?
ISRO interview experience plus the GFG note in the stories section.
Will I be posted only in Bengaluru?
No. The letter names the centre. Say yes or no before you celebrate a written shortlist.
Real ISRO interview notes from candidates
Scientist/Engineer SC, Bengaluru (GFG)
DV 11 August 2024, interview 12 August. “Approximately 30 students were called for the interview on that day.” One slot started 12:30 and lasted about 25 minutes. Multi-member panel on OS/DBMS/networks/security, B.Tech project, whiteboard derivations. Source: GeeksforGeeks ISRO Scientist SC Bengaluru.
Takeaway: 25 minutes is short. Lead with the project. Derive, do not speechify.
Composite notes students repeated
What helped: GATE-depth notes, a board sketch, honest “I have not flown a satellite” plus a real lab project.
What hurt: mission trivia without mechanism; fake internships; arguing CTC; refusing every centre.
After you clear written
- Two 30-minute board mocks.
- Rewrite weak core topics from the paper you sat.
- Five mission explanations in your words.
- Documents.
- Sleep. Do not open a new optional subject.
Mini panel close you should be able to run cold
Explain your B.Tech project in five minutes.
- Problem in one sentence.
- Block diagram.
- One equation or complexity.
- What broke and what you changed.
- What you would rebuild with more time.
That is an SC-level close. A 12-slide “vision for Indian space” pastiche is not.
25-minute CS panel (from the 2024 Bengaluru note)
You will not cover all of OS, DBMS, CN, and security. Lead with the project. When they pick OS, pick one process vs thread plus one scheduling or deadlock example you can finish. When they pick DBMS, pick normalisation or a join plus one integrity idea. When they pick networks, pick TCP vs UDP or a 3-way handshake you can draw. When they pick security, pick one real control you used (hashing passwords, sanitising input), not a movie hacker story.
If they ask a derivation, start writing. Silence while you “think of the best answer” eats the slot. A messy correct setup beats a polished wrong slogan.
Electronics / Mechanical cousins
ECE: one communications block, one control sketch, one circuit you can analyse. Mech: one thermo or structures sketch, one manufacturing or materials sentence tied to launchers only if you actually studied it. Do not volunteer propulsion trivia you cannot defend.
Mission literacy that is enough
You should be able to say, in your words:
- PSLV vs GSLV (which missions, roughly why two families exist)
- Chandrayaan-3 as a landing success, not a Wikipedia dump
- Aditya-L1 as a solar observatory at L1, one sentence on why L1
- Gaganyaan as a human-spaceflight programme still in progress, not “we already fly astronauts daily”
Five honest sentences beat fifty memorised dates.
More narratives: ISRO interview experience.