ISRO SAC Scientist/Engineer Recruitment 2026: Apply Online for 49 Vacancies

ISRO SAC Scientist / Engineer Exam Preparation Overview

Preparing for the Space Applications Centre (SAC) ISRO Scientist/Engineer ‘SC’ and ‘SD’ examination requires a disciplined approach, strong mastery over core technical fundamentals, and intense practice of problem-solving techniques. Since ISRO focuses heavily on core conceptual clarity and application-based questions, candidates must organize their final revision efficiently before entering the exam center.

Comprehensive Exam Pattern and Selection Details

The selection process for ISRO SAC Scientist/Engineer posts comprises an initial Computer-Based Test (CBT) followed by a rigorous Personal Interview stage for qualified candidates. Understanding the exam structure helps in managing time effectively during the actual exam.

• Exam Mode: Computer-Based Online Test (CBT).
• Question Type: Multiple Choice Questions (MCQs) focusing on core discipline fundamentals and advanced technical concepts.
• Technical Section: Tailored to the candidate’s core engineering branch (Electronics, Mechanical, Computer Science, Physics, etc.).
• Aptitude & Reasoning: Covers analytical reasoning, numerical ability, spatial reasoning, and comprehension.
• Negative Marking: Penalty for incorrect answers as specified in the official exam guidelines.

Key Syllabus Topics for Technical Revision

Candidates should focus their last-minute preparation on key subjects pertinent to their specific engineering discipline:

• Electronics & Communication: Network Theory, Signal & Systems, Electromagnetic Theory, Analog & Digital Circuits, Communication Systems, Microwave Engineering, and VLSI Design.
• Mechanical Engineering: Engineering Mechanics, Strength of Materials, Thermodynamics, Fluid Mechanics, Heat Transfer, Machine Design, and Manufacturing Technology.
• Computer Science & IT: Data Structures & Algorithms, Operating Systems, Computer Networks, Database Management Systems (DBMS), Theory of Computation, and Computer Architecture.
• General Engineering & Aptitude: Linear Algebra, Calculus, Differential Equations, Probability & Statistics, Data Interpretation, and Logical Reasoning.

Strategic Preparation and Last-Minute Revision Tips

To maximize scores in the competitive ISRO SAC recruitment test, candidates should implement the following targeted preparation strategies:

• Prioritize Core Formulas and Concepts: Revisit key mathematical formulas, physical principles, and standard equations across all core subjects. Maintain a quick-formula handbook for rapid revision.
• Analyze Previous ISRO Question Papers: Review past ISRO Scientist/Engineer exam question papers to identify recurring patterns, standard question formats, and highly weighted topics.
• Take Timed Mock Tests: Practice online mock tests to improve speed and accuracy. Time management is critical in CBTs to ensure all technical problems are tackled smoothly.
• Focus on Accuracy over Quantity: Avoid wild guessing due to negative marking. Select questions wisely and attempt high-confidence questions first.
• Manage Exam Stress and Logistics: Ensure all logistical arrangements are made in advance. Download your hall ticket early, verify the test center venue, and assemble necessary original ID proofs.

Exam Hall Guidelines and Necessary Precautions

Candidates must carefully review all instructions printed on their ISRO SAC Hall Ticket. Arrive at the examination venue at least 45 minutes prior to the reporting time. Electronic gadgets, calculators, smartwatches, and study materials are strictly prohibited inside the center. Follow the invigilator’s instructions carefully during the CBT process.