Download free ISRO placement papers 2025 PDF with previous year questions and solutions. Access exam pattern, eligibility criteria, interview process, and complete preparation guide.
ISRO (Indian Space Research Organisation) is India’s national space agency responsible for space research and applications. Founded in 1969, ISRO has achieved remarkable milestones including Mars Orbiter Mission, Chandrayaan missions, and satellite launches. ISRO recruits scientists and engineers for various space programs.
Headquarters: Bengaluru, India
Employees: 17,000+ globally
Industry: Space Research, Aerospace, Government
Type: Public Sector Undertaking (PSU)
Download free ISRO placement papers 2025 with previous year questions, detailed solutions, exam pattern, and complete preparation guide. Access ISRO last 5 years placement papers with solutions PDF download and practice with solved questions covering all sections.
Academic Requirements
Marks: 65% or 6.5+ CGPA in 10th, 12th, and graduation
Degree: B.E./B.Tech/M.E./M.Tech/M.Sc in relevant engineering or science disciplines
Year of Study: Final year students and recent graduates
Backlogs: No active backlogs at the time of application
Branch Eligibility
Eligible Branches: Aerospace, Electronics, Mechanical, Computer Science, Electrical, Civil, Physics, Chemistry
Specialization: Space technology, satellite systems, rocket propulsion
Research Roles: PhD required for research positions
Additional Criteria
Age Limit: Varies by position (typically 18-35 years)
Gap Years: Maximum 2 years gap allowed with valid reason
Course Type: Full-time regular courses only
Nationality: Indian citizens and eligible candidates
Scientist/Engineer (SC) Role
Primary Role: Scientist/Engineer (SC) - Level 10
Salary Package: ₹56,100-1,77,500 per month (plus allowances) for freshers
Selection: Through ISRO placement process (3 rounds)
Focus: Technical knowledge, space technology awareness, aptitude
Access free ISRO placement papers PDF and ISRO previous year question paper with detailed solutions. Download ISRO last year question paper and ISRO question paper PDF from previous years with comprehensive question banks covering technical questions, aptitude, and space technology.
2024 Placement Papers PDF
Download ISRO placement papers 2024 PDF with previous year technical questions, aptitude questions, solutions, and exam pattern analysis.
2025 Placement Papers PDF
Download latest ISRO placement papers 2025 PDF with current year technical questions, aptitude questions, solutions, and updated exam patterns.
2026 Preparation Guide
Prepare for ISRO placement 2026 with expected exam pattern, technical questions, aptitude questions, and comprehensive preparation strategy.
What's Included
Complete ISRO placement papers (2024-2026) with technical questions, aptitude questions, detailed solutions, answer keys, exam pattern analysis, and topic-wise organization.
Official Website
Primary Method: Apply through ISRO official website (www.isro.gov.in) when recruitment notifications are published
Direct Recruitment
Campus Recruitment: Some positions may be filled through campus recruitment drives at select institutions
Research Positions
Research Fellowships: Junior Research Fellow (JRF) and Research Associate positions through separate notifications
The ISRO placement process focuses on technical depth and space technology awareness. Understanding the detailed exam pattern is crucial for effective preparation.
Written Examination - 90 minutes
Total Duration: 90 minutes Total Questions: 80-100 questions (varies by discipline) Format: Pen-paper based or online (depending on recruitment drive) Negative Marking: Yes (typically 0.25 marks deducted per wrong answer) Platform: ISRO examination centers or online platform
Section-wise Breakdown:
| Section | Questions | Time | Difficulty | Focus Areas |
|---|---|---|---|---|
| Technical (Discipline-Specific) | 50-60 | 60 min | Medium-Hard | Core engineering subjects, space technology basics |
| General Aptitude | 20-25 | 20 min | Easy-Medium | Quantitative, Logical Reasoning, Verbal Ability |
| Space Technology | 10-15 | 10 min | Medium | ISRO missions, satellite systems, rocket propulsion |
Section Details:
Important Notes:
Success Rate: ~15-20% of candidates clear this round
Technical Interview - 60 minutes
Format: Face-to-face or virtual (depending on situation)
Evaluation:
Success Rate: ~40-50% of written exam qualifiers advance
HR/Personality Round - 30 minutes
Format: Face-to-face discussion
Success Rate: ~70-80% of technical interview candidates get offers
| Phase | Duration | Key Activities |
|---|---|---|
| Application Submission | 2-3 weeks | Submit application through ISRO website, document verification |
| Written Examination | 1 day | Written test at designated centers or online |
| Result Declaration | 1-2 weeks | Written exam results published, shortlisted candidates notified |
| Technical Interview | 1 day | Technical interview for shortlisted candidates |
| HR Interview | Same day | HR/Personality round (may be combined with technical) |
| Final Selection | 1-2 weeks | Final results published, offer letters sent to selected candidates |
Practice with sample ISRO placement paper questions covering technical concepts, aptitude, and space technology.
Q1: What is the specific impulse of a rocket engine and how does it affect rocket performance?
Problem: Explain specific impulse (Isp) and its significance in rocket propulsion.
Solution: Specific impulse (Isp) is defined as the thrust produced per unit weight flow rate of propellant. It is measured in seconds and represents the efficiency of a rocket engine.
Explanation:
Answer: Specific impulse measures rocket engine efficiency. Higher Isp allows more payload or longer missions with same propellant mass.
Q2: Explain the difference between geostationary and geosynchronous orbits.
Problem: Distinguish between geostationary and geosynchronous orbits with examples.
Solution: Geosynchronous orbit: Orbital period equals Earth’s rotation period (24 hours), can be inclined Geostationary orbit: Special case of geosynchronous with 0° inclination, appears fixed above equator
Explanation:
Answer: Geostationary is a special geosynchronous orbit with 0° inclination, appearing fixed above equator. ISRO’s INSAT satellites use geostationary orbit.
Q3: A satellite orbits Earth at an altitude where its orbital period is 2 hours. What is the approximate altitude? (Earth radius = 6371 km)
Problem: Calculate satellite altitude given orbital period.
Solution: Using Kepler’s third law: T² ∝ a³ For Earth: T² = (4π²/GM) × a³ Geostationary period = 24 hours, altitude = 35,786 km
Explanation:
Answer: Approximately 329 km altitude (Low Earth Orbit)
Q4: If a rocket’s mass ratio is 10:1 and exhaust velocity is 3000 m/s, what is the delta-v?
Problem: Calculate delta-v using Tsiolkovsky rocket equation.
Solution: Delta-v = v_e × ln(m₀/m_f) Where v_e = exhaust velocity, m₀ = initial mass, m_f = final mass
Explanation:
Answer: Delta-v = 6,909 m/s (approximately 6.9 km/s)
Q5: What are the main components of a satellite communication system?
Problem: List and explain main components of satellite communication.
Solution: Main components: Space segment, Ground segment, User segment
Explanation:
Answer: Three main components: Space segment (satellite), Ground segment (earth stations), and User segment (terminals). ISRO’s INSAT satellites provide communication services.
Learn from real ISRO placement interview experiences shared by candidates who successfully cleared the placement process. These authentic stories help you understand what to expect and how to prepare effectively.
Key Insights from Interview Experiences:
Complete Interview Experiences
Read detailed ISRO placement interview experiences including:
Space Technology
Satellite Systems: Communication satellites, remote sensing, navigation (GPS)
Rocket Propulsion: Chemical propulsion, electric propulsion, solid/liquid fuels
Orbital Mechanics: Kepler’s laws, orbital transfers, Hohmann transfers
Space Environment: Vacuum, radiation, thermal management
Mission Design: Launch vehicles (PSLV, GSLV), payload design, mission planning
Core Engineering
Aerospace: Aerodynamics, propulsion, structures, flight mechanics
Electronics: Circuits, signals, communication systems, control systems
Mechanical: Thermodynamics, mechanics, design, manufacturing
Computer Science: Algorithms, data structures, programming, software engineering
Electrical: Power systems, control systems, electronics, instrumentation
Mathematics & Physics
Mathematics: Calculus, linear algebra, differential equations, numerical methods
Physics: Mechanics, thermodynamics, electromagnetism, optics
Applied Math: Statistics, probability, optimization, numerical analysis
Engineering Math: Complex analysis, transform methods, matrix algebra
Prepare for ISRO placement HR interview with common questions and effective strategies. ISRO HR interview is typically conversational and focuses on motivation, interest in space technology, and alignment with ISRO’s mission.
Common HR Interview Topics:
Complete HR Interview Guide
Access complete guide to ISRO HR interview questions including:
Key Preparation Principles:
Preparation Approaches:
Complete Preparation Guide
Access comprehensive ISRO placement paper preparation guide including:
| Level | Experience | Basic Pay | Total Package (Annual) | Typical Background |
|---|---|---|---|---|
| Scientist/Engineer (SC) | Freshers | ₹56,100-1,77,500 | ₹8-12 LPA | B.Tech/M.Tech graduates |
| Junior Research Fellow | Freshers | ₹31,000-35,000 | ₹4-5 LPA | M.Tech/PhD students |
| Research Associate | 1-2 years | ₹47,000-54,000 | ₹7-8 LPA | PhD holders |
| Role | Level | Total Package (Annual) | Requirements |
|---|---|---|---|
| Technician | Entry | ₹4-6 LPA | Diploma holders |
| Scientific Assistant | Entry | ₹5-7 LPA | B.Sc/M.Sc graduates |
Hiring Trends 2025
Increased Recruitment: ISRO is expanding recruitment across multiple disciplines
Focus Areas: Gaganyaan mission, Chandrayaan-4, Aditya-L1 operations, satellite development
New Centers: Expansion of ISRO facilities creating more opportunities
Process Changes
Online Examinations: Gradual shift towards online examination platforms
Streamlined Process: Faster result declaration and interview scheduling
Virtual Interviews: Option for virtual technical interviews in some cases
New Initiatives
Gaganyaan Program: Human spaceflight program creating new roles
Space Station: Planning for Indian space station creating future opportunities
International Collaborations: Joint missions creating diverse opportunities
Company Growth
Mission Expansion: More frequent launches and missions
Technology Development: Focus on reusable launch vehicles, advanced propulsion
Commercial Space: Growing commercial space sector opportunities
ISRO placement papers are previous year question papers from ISRO recruitment tests and interview rounds. These papers contain technical questions (discipline-specific), aptitude questions, space technology questions, and interview questions that help students understand the exam pattern and prepare effectively for ISRO placement process.
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Yes, you can access ISRO placement papers online with previous year technical questions, aptitude questions, and interview questions. Our website provides ISRO placement papers PDF download, ISRO previous year questions with solutions, ISRO technical exam questions, and ISRO interview questions. All papers are completely free and require no registration.
We provide ISRO placement papers from recent years including 2024 and 2025. Our collection is regularly updated with the latest questions and exam patterns. We also provide preparation guides for 2026.
ISRO placement papers cover: Technical questions (discipline-specific based on your branch - Aerospace, Electronics, Mechanical, CS, etc.), General Aptitude (quantitative, logical reasoning, verbal ability), Space Technology (satellite systems, rocket propulsion, ISRO missions), and Interview questions (technical and HR).
ISRO placement process includes: 1. Written Examination (90 minutes) - Technical questions based on discipline, General Aptitude (Quantitative, Logical Reasoning, Verbal Ability), Space Technology questions, 2. Technical Interview (60 minutes) - Deep dive into engineering subjects, space technology questions, project discussions, 3. HR/Personality Round (30 minutes) - Motivation, interest in space technology, behavioral questions. Total duration: 4-6 weeks from application to offer.
ISRO exam pattern includes: Written Examination (90 minutes) with Technical Questions (50-60 questions, discipline-specific), General Aptitude (20-25 questions covering quantitative, logical reasoning, verbal ability), and Space Technology (10-15 questions on satellite systems, rocket propulsion, ISRO missions). The exam has negative marking (typically 0.25 marks per wrong answer).
The ISRO placement process typically takes 4-6 weeks from application submission to offer letter. This includes: Application review (2-3 weeks), Written examination (1 day), Result declaration (1-2 weeks), Technical and HR interviews (1 day), Final selection (1-2 weeks).
ISRO interview process consists of 3 rounds: 1. Written Examination (90 minutes), 2. Technical Interview (60 minutes), 3. HR/Personality Round (30 minutes). Total duration: 4-6 weeks from application to offer letter. Some specialized roles may have additional technical rounds.
ISRO interview questions include: Technical Concepts (core engineering subjects, space technology basics), Project Discussion (academic and research projects, technologies used), Space Technology (ISRO projects, satellite systems, rocket propulsion), Problem-Solving (engineering problems, analytical reasoning), General Awareness (ISRO missions, space science), and Behavioral Questions (motivation, teamwork, dedication). All questions focus on technical depth and passion for space technology.
Success rates vary by round: Written Examination (~15-20% clear), Technical Interview (~40-50% of written qualifiers advance), HR Round (~70-80% of technical interview candidates get offers). Overall, approximately 5-8% of applicants receive final offers.
ISRO eligibility criteria for freshers 2025: Minimum 65% or 6.5+ CGPA in 10th, 12th, and graduation. Degree required: B.E./B.Tech/M.E./M.Tech/M.Sc in relevant engineering or science disciplines (Aerospace, Electronics, Mechanical, Computer Science, Electrical, Civil, Physics, Chemistry). Final year students and recent graduates are eligible. Age limit typically 18-35 years. No active backlogs at the time of application.
ISRO eligibility criteria for freshers 2026 are the same as 2025: Minimum 65% or 6.5+ CGPA across all academic levels, B.E./B.Tech/M.E./M.Tech/M.Sc in relevant engineering or science disciplines, final year students or recent graduates, age limit typically 18-35 years, and no active backlogs.
The minimum CGPA required for ISRO is 6.5 CGPA (65%) across 10th, 12th, and graduation. However, candidates with higher CGPA (7.5+ or 75%+) have better chances of selection. The CGPA requirement is consistent across all roles for freshers, though research positions may have higher requirements.
Eligible branches for ISRO include: Aerospace Engineering, Electronics Engineering, Mechanical Engineering, Computer Science Engineering, Electrical Engineering, Civil Engineering, Physics, Chemistry, and related engineering or science disciplines. Research positions may require specific specializations or PhD.
ISRO salary for freshers (2025): Scientist/Engineer (SC): ₹56,100-1,77,500 per month (Level 10 pay matrix), total annual compensation ₹8-12 LPA including allowances. Junior Research Fellow: ₹31,000-35,000 per month (₹4-5 LPA). Research Associate: ₹47,000-54,000 per month (₹7-8 LPA). All figures include basic pay plus HRA, DA, and other allowances.
ISRO offers excellent career growth opportunities: Progression from Scientist/Engineer (SC) to higher levels, opportunities to work on prestigious missions (Chandrayaan, Mars Orbiter, Gaganyaan), research and development opportunities, training and skill development programs, and potential for international collaborations and assignments.
To prepare for ISRO placement: 1. Core Engineering Subjects (40% time) - Master your discipline-specific knowledge, 2. Space Technology Basics (25%) - Learn satellite systems, rocket propulsion, orbital mechanics, ISRO missions, 3. Aptitude & Reasoning (20%) - Practice quantitative aptitude, logical reasoning, verbal ability, 4. Technical Interview Prep (10%) - Project discussions, space technology awareness, 5. General Awareness (5%) - ISRO missions, recent achievements, space science. Focus on strong fundamentals in your engineering discipline.
Focus on: Core engineering subjects in your discipline (Aerospace, Electronics, Mechanical, CS, etc.), Space technology basics (satellite systems, rocket propulsion, orbital mechanics), ISRO missions and achievements (Chandrayaan, Mars Orbiter, Gaganyaan), Aptitude and reasoning (quantitative, logical, verbal), and Technical interview preparation (projects, problem-solving). See the preparation strategy section for detailed topic breakdown.
Preparation time depends on your background: Strong fundamentals (3 months intensive preparation), Average background (4-6 months comprehensive preparation), Weak areas (6+ months extended preparation). Focus on consistent daily practice, especially in core engineering subjects and space technology awareness.
ISRO offers: Opportunity to work on prestigious space missions (Chandrayaan, Mars Orbiter, Gaganyaan), Job security as a government PSU, Excellent work-life balance, Research and development opportunities, Access to cutting-edge space technology, Professional growth and skill development, Contribution to India’s space program, and Competitive compensation with government benefits.
ISRO’s work culture emphasizes: Scientific excellence and innovation, Teamwork and collaboration, Commitment to India’s space program, Research-oriented environment, Professional development opportunities, Work-life balance, and Pride in contributing to national space missions.
ISRO: Space research and applications, prestigious missions, ₹8-12 LPA for freshers, excellent job security, research opportunities
DRDO: Defense research and development, defense technology, similar salary ranges, research focus, national security
BHEL: Power and heavy engineering, industrial applications, similar PSU benefits, manufacturing focus, diverse engineering roles
Choose ISRO if you’re interested in space technology and prestigious missions. Choose DRDO if you prefer defense technology. Choose BHEL if you prefer industrial/manufacturing applications.
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Ready to start your ISRO preparation? Practice with our placement papers and focus on strong fundamentals in your engineering discipline and space technology awareness.
Pro Tip: Stay updated with ISRO’s latest missions and achievements. Understanding ISRO’s work shows genuine interest and helps in both written exam and interviews.
Last updated: November 2025
