AS per your concern I will let you know DRDO Scientist Entry Test (SET) eligibility and further details.

Eligibility
Required Qualification
Appliers must be first class Bachelor Degree Holder In Engineering / technology / electronics / communication / mechanical engineering or computer science from any recognized university or institutions.

Age limitation
Candidate’s age should not above maximum 28 years.

Exam Pattern
DRDO SET exam is of three hours duration consisting of two sections section A and Section B.

Section ‘A’ is of 100 questions to test the candidate’s knowledge in the subject of their BE / B.Tech (for Engg discipline) or M.Sc (for Science Discipline).

Section ‘B’ is of 50 questions to test the candidate’s ability in analytical and qualitative skills, current affairs and general awareness to test the aptitude and scientific knowledge required for Applied Research & Development.

Syllabus
Chemical Engineering:
Process Calculations and Thermodynamics
Fluid Mechanics and Mechanical Operations
Heat Transfer
Mass Transfer
Chemical Reaction Engineering
Instrumentation and Process Control
Plant Design and Economics
Chemical Technology

Computer Science and Engineering:
Theory of Computation
Digital Logic
Computer Organization and Architecture
Programming and Data Structures
Algorithms
Compiler Design
Operating System
Databases
Computer Networks

Electronics and Communication Engineering:
Networks
Electronic Devices
Analog Circuits
Digital Circuits
Signals and Systems
Control Systems
Communications
Electromagnetic

Electrical Engineering:
Electric Circuits and Fields
Signals and Systems
Electrical Machines
Power Systems
Control Systems
Electrical and Electronic Measurements
Analog and Digital Electronics
Power Electronics and Drives

Instrumentation Engineering:
Basics of Circuits and Measurement Systems
Transducers, Mechanical Measurement and Industrial Instrumentation
Analog Electronics
Digital Electronics
Signals, Systems and Communications
Electrical and Electronic Measurements
Control Systems and Process Control
Analytical, Optical and Biomedical Instrumentation

Mechanical Engineering:
Engineering Mechanics
Strength of Materials
Theory of Machines
Vibrations
Design
Fluid Mechanics
Heat-Transfer
Thermodynamics
Applications
Engineering Materials
Metal Casting
Forming
Joining
Machining and Machine Tool Operations
Metrology and Inspection
Computer Integrated Manufacturing
Production Planning and Control
Inventory Control
Operations Research