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Defence Research & Development Organisation Scientist Interview Questions and Answers

Updated 29 Jun 2015

Defence Research & Development Organisation Scientist Interview Experiences

2 interviews found

Scientist Interview Questions & Answers

user image Anonymous

posted on 29 Jun 2015

Interview Preparation Tips

Round: Test
Experience: After filling a bio-data form mentioning the details regarding projects/papers published and BTP/DDP, shortlisting is done based on the following points:CG cut-off 6.75. Shortlisted after comparing the test scores of all the students.
Objective type test is conducted on the basis of aptitude and core questions.
Duration: 90 minutes

Round: Technical Interview
Experience: It was a Skype interview with a panel of 8 and questions were asked about core engineering,internship and projects.Additional questions were asked regarding the branch one is interested in.Questions were asked about the work DRDO has done and is doing and about BTP.

General Tips: One need to be thorough with core subjects,at least the one you are interested in.Be confident while answering questions and avoid talking about something of which you have no knowledge.
College Name: IIT MADRAS

Scientist Interview Questions & Answers

user image Anonymous

posted on 7 Jan 2015

Interview Preparation Tips

Round: Interview
Tips: Concentrate on basic Naval architecture and Ocean engineering topics and Fluid mechanicsPrepare well on your project as they tend to focus on DDP/BTPAdvantage if your project matches with DRDO interests

College Name: IIT Madras

Scientist Interview Questions Asked at Other Companies

Q1. What is the minimum temperature of any substance that we could re ... read more
Q2. Waste water treatment technologies, options of Reverse osmosis tr ... read more
Q3. What would you like to do? ( Design of rockets or design of elect ... read more
Q4. Humidity ratio- how is it measured? ( Two types) What does 1 ton ... read more
Q5. IC engines- Spark plug, how combustion takes place, what is dtsi, ... read more

Interview questions from similar companies

Interview experience
4
Good
Difficulty level
Moderate
Process Duration
Less than 2 weeks
Result
Selected Selected

I applied via Campus Placement and was interviewed before Apr 2023. There was 1 interview round.

Round 1 - Technical 

(2 Questions)

  • Q1. What is stability?
  • Ans. 

    Stability refers to the ability of a system to return to a steady state after being disturbed.

    • Stability is crucial in various fields such as engineering, economics, and ecology.

    • In engineering, stability is important for structures to withstand external forces without collapsing.

    • In economics, stable markets are characterized by consistent prices and low volatility.

    • In ecology, stable ecosystems have balanced populations ...

  • Answered by AI
  • Q2. Nyquist criterion?

Interview Preparation Tips

Interview preparation tips for other job seekers - Gets basics right

Skills evaluated in this interview

Interview Questionnaire 

12 Questions

  • Q1. Questions about fluid dynamics
  • Q2. Wind tunnels, materials & their properties
  • Ans. 

    Wind tunnels are used to study the effects of air on objects. Materials and their properties play a crucial role in wind tunnel experiments.

    • Wind tunnels are used to simulate the flow of air around objects, allowing scientists to study aerodynamics.

    • Different materials have different properties that can affect the results of wind tunnel experiments.

    • Materials with low drag coefficients, such as smooth metals, are often us...

  • Answered by AI
  • Q3. Solid Mechanics
  • Q4. Internship-based
  • Q5. Modes of vibrations of beans
  • Ans. 

    Modes of vibrations of beans refer to the different ways in which beans can oscillate or vibrate.

    • Beans can vibrate in different modes depending on their shape, size, and material properties.

    • Some common modes of vibrations in beans include bending, twisting, and radial vibrations.

    • The mode of vibration affects the frequency, amplitude, and pattern of the bean's oscillation.

    • Understanding the modes of vibrations in beans c...

  • Answered by AI
  • Q6. Friction + Lubrication
  • Q7. 4-R Linkages
  • Q8. Heat transfer, control systems
  • Q9. MOS, design of machine elements
  • Q10. Flight mechanics and structures
  • Q11. Semiconductors & digital electronics
  • Q12. Types of counters, to design a divide by 5 counters
  • Ans. 

    There are several types of counters that can be used to design a divide by 5 counter.

    • Ripple counter

    • Synchronous counter

    • Johnson counter

    • Ring counter

  • Answered by AI

Interview Preparation Tips

Round: Technical Interview
Experience: 30 minutes duration.

General Tips: Good command over
1. MOS & Fluid dynamics, Dynamics & Vibrations, Heat & Mass transfer, Theory of
mechanisms, propulsion1,2,Aero-D,flight mechanical. Structures 1,2, ME 359-IC
engine
2. ME-453-automation & control
3. ME-341-Heat & Mass transfer
4. ME-351-Theory of machines & mechanisms, Vibration & control, fluid dynamics &
turbo machinery
5. Don’t try to answer those question which you are not sure of because panel members
are very expert.
Skills: Automation & control, Mass transfer, Theory of machines & mechanisms, fluid dynamics, Heat transfer, turbo machinery, Vibration & control
College Name: IIT KANPUR

Interview Questionnaire 

6 Questions

  • Q1. How many laws of thermodynamics? Applications of each of them. What is dB Amp
  • Ans. 

    There are three laws of thermodynamics. Each law has specific applications. dB Amp is not related to thermodynamics.

    • The first law of thermodynamics, also known as the law of energy conservation, states that energy cannot be created or destroyed, only transferred or transformed.

    • The second law of thermodynamics states that the entropy of an isolated system always increases over time.

    • The third law of thermodynamics states...

  • Answered by AI
  • Q2. IC engines- Spark plug, how combustion takes place, what is dtsi, why is it used, Types of engines- 2 stroke vs 4 stroke
  • Ans. 

    Spark plug ignites fuel-air mixture in IC engines. DTSI improves combustion efficiency. 2-stroke and 4-stroke engines differ in number of strokes per cycle.

    • Spark plug ignites the fuel-air mixture in the combustion chamber

    • DTSI (Digital Twin Spark Ignition) is a technology used to improve combustion efficiency by using two spark plugs

    • 2-stroke engines complete one power stroke in two strokes of the piston, while 4-stroke ...

  • Answered by AI
  • Q3. Humidity ratio- how is it measured? ( Two types) What does 1 ton refrigerator mean? Parts of refrigeration cycle? Which is the smallest component?
  • Ans. 

    Humidity ratio is measured using two types of instruments: psychrometers and hygrometers.

    • Psychrometers measure humidity ratio by comparing the readings of two thermometers: a dry-bulb and a wet-bulb thermometer.

    • Hygrometers measure humidity ratio using various principles such as electrical resistance, capacitance, or condensation.

    • A 1 ton refrigerator refers to the cooling capacity of the refrigerator, which is equivalen...

  • Answered by AI
  • Q4. What would you like to do? ( Design of rockets or design of electronic components with heat transfer applications) Then
  • Ans. 

    I would like to design electronic components with heat transfer applications.

    • I have a strong interest in electronics and how heat can be managed in electronic systems.

    • I enjoy working on projects that involve designing and optimizing electronic components for efficient heat dissipation.

    • I have experience in conducting thermal analysis and simulations to ensure proper heat transfer in electronic devices.

    • I find it fascinat...

  • Answered by AI
  • Q5. What material will you choose Al or Mg for designing and why? What is concurrent engineering?
  • Ans. 

    The choice between Al and Mg for designing depends on the specific requirements and constraints of the project.

    • Aluminum (Al) is lightweight, corrosion-resistant, and has good thermal conductivity, making it suitable for applications where weight reduction is important, such as aerospace.

    • Magnesium (Mg) is even lighter than aluminum, but it has lower strength and is more prone to corrosion. It is commonly used in automot...

  • Answered by AI
  • Q6. What is difference between rocket and missile?
  • Ans. 

    A rocket is a vehicle that propels itself through the atmosphere or space, while a missile is a weapon that is guided towards a target.

    • Rockets are used for space exploration, satellite launches, and transportation, while missiles are used for military purposes.

    • Rockets are typically unmanned and used for peaceful purposes, while missiles are often armed and used for warfare.

    • Rockets are designed to carry payloads such as...

  • Answered by AI

Interview Preparation Tips

Round: Technical Interview
Experience: The interview was very technical and basic.
Tips: Try to smile as interviewers will be serious first to test your stress levels. Prepare subjects related to your project and be thorough in basics of any of three favorite subjects. You can pick maths as well :)

Skills:
College Name: IIT Kharagpur
Motivation: It is THE place for students looking for research in INDIA.

Skills evaluated in this interview

I applied via Campus Placement and was interviewed in Dec 2016. There were 3 interview rounds.

Interview Preparation Tips

Round: Resume Shortlist
Experience: The first round was just a resume shortlist, People with a CPI of >7 were shortlisted. It apparently appeared that CPI was not the only criteria but the projects done had also carried some weight.
Tips: If you are targeting ISRO, having some projects in the areas of IC design or Signal Processing or Communication can sharpen your chances

Round: Technical Interview
Experience: They looked at my Resume and came to a correct conclusion that I was interested in IC design, in general, which was indeed true. They have asked about the courses undertaken in the last 7 semesters. They indeed paid careful attention to every course I had mentioned before them. They enquired about my interest (Analog IC design) and started switching gears, followed by a stream of questions.
Tips: They keep extending the question, even if you answer them correctly. You just have to maintain your composure and carry on.
For further queries drop a mail to *****, Happy to help !!

College Name: IIT Guwahati

I was interviewed in Dec 2016.

Interview Questionnaire 

5 Questions

  • Q1. The panel comprised of 3 members. The interview panel was very cordial. They first asked me about my birthplace and some famous tourist locations in my state.
  • Q2. Then they started reading my resume line by line and asked in details about every project and internship that I have done.
  • Q3. It was my publication in IEEE that impressed then the most.
  • Q4. They asked me my favorite subjects and asked some questions from it.
  • Q5. Then they asked me solutions to some of the practical problems that they face. In this round they basically want to judge your approach to the problem.

Interview Preparation Tips

Round: Resume Shortlist
Experience: Was very lucky to get shortlisted. My projects and internship might have impressed them.
Tips: Try to make your resume very specific to their ongoing work.

Round: Technical + HR Interview
Experience: The interview went for around 40 minutes.

College Name: IIT Guwahati

I was interviewed in May 2021.

Interview Questionnaire 

1 Question

  • Q1. What is the minimum temperature of any substance that we could reach and use it for practical purposes?
  • Ans. 

    The minimum temperature of any substance that we could reach and use for practical purposes is absolute zero, which is -273.15 degrees Celsius or 0 Kelvin.

    • The minimum temperature is known as absolute zero.

    • It is the lowest possible temperature that can be reached.

    • At absolute zero, all molecular motion ceases.

    • Practical applications include cryogenics and superconductivity.

    • Examples of practical uses are in medical imaging

  • Answered by AI

Interview Preparation Tips

Interview preparation tips for other job seekers - Interview is purely technical and rigorous. Leave no stone unturned in your fav subjects.

I applied via Company Website and was interviewed before Sep 2021. There were 2 interview rounds.

Round 1 - Resume Shortlist 
Pro Tip by AmbitionBox:
Keep your resume crisp and to the point. A recruiter looks at your resume for an average of 6 seconds, make sure to leave the best impression.
View all tips
Round 2 - HR 

(2 Questions)

  • Q1. Where are you from coming ?
  • Q2. WHat is the last propulsion system that you have built ?
  • Ans. 

    The last propulsion system I built was a hybrid rocket engine for a small satellite.

    • Developed a hybrid rocket engine using a combination of solid fuel and liquid oxidizer

    • Tested the engine for efficiency and performance

    • Integrated the propulsion system into a small satellite for orbital maneuvers

  • Answered by AI

Interview Preparation Tips

Interview preparation tips for other job seekers - Awesome kjdg anldsnglkasndgla'nglankdgnaldgnas
Interview experience
5
Excellent
Difficulty level
-
Process Duration
-
Result
-
Round 1 - One-on-one 

(2 Questions)

  • Q1. How do you align to our proect
  • Ans. 

    I align with your project by understanding the goals, values, and expectations of the organization and ensuring my work contributes to its success.

    • Researching and familiarizing myself with the project goals and objectives

    • Communicating effectively with team members to ensure alignment

    • Adapting my skills and expertise to meet the project requirements

    • Seeking feedback and making adjustments as needed

    • Prioritizing tasks based

  • Answered by AI
  • Q2. Explain your previous experience
  • Ans. 

    I have 2 years of experience in marketing and social media management for a tech startup.

    • Managed social media accounts and created engaging content

    • Developed and implemented marketing strategies to increase brand awareness

    • Analyzed data to track the success of campaigns

  • Answered by AI

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