✅ My BEL Deputy Engineer Interview Experience

Location: BEL Officer’s Colony, Ghaziabad Unit
Panel: 5 Interviewers
Duration: ~15–20 minutes
Difficulty Level: Moderate

Interview Flow & Questions

1. Introduction
   • Tell me about yourself and your hometown.
2. Work Experience (for experienced candidates)
   • Detailed discussion on my past company and assigned role.
   • Specific technical questions from my domain (Microwave Antenna Commissioning):
     • How will you find the error if there is any?
     • What is RSSI (Received Signal Strength Indicator)?
     • How is your work experience relevant to BEL?
3. Final Year Project
   • They asked extensively about my final year project, even though I am experienced.
   • This included the concept, practical implementation, and key learnings.
4. College Practical Knowledge
   • What practical experiments did you perform in the lab?
   • Explain outputs, transfer characteristics, and instruments used.
   • Explain Diode characteristics in detail.
5. Additional Technical Question
   • What is an AM Modulator? (I tried but couldn’t recall the block diagram completely.)

Key Takeaways

✅ Be prepared with final year projects and hands-on practical knowledge, even if you are experienced.
✅ Expect in-depth questions from your work domain, and how it relates to BEL’s operations.
✅ The panel was helpful if you got stuck, so stay calm and think through your answers.

Result: Waiting for the merit list.

✅ BEL Interview Experience – ECE Discipline

I am from Electronics and Communication Engineering (ECE) and had appeared for a BEL interview at the BEL Ghaziabad unit.

The interview panel consisted of 4 members, and they were quite friendly throughout the process.

The session began with a request for a brief self-introduction, where I shared details about my academic background. From there, they asked a few personal questions related to my schooling, family, and hometown (Siliguri, West Bengal).

Next, one of the interviewers asked me to mention the topics I was most comfortable with. I responded with Radar, Antennas, and Communication Systems.

They then handed me two white sheets and a pen, and the technical round began with the following questions:

• Draw the basic block diagram of a Radar system.
• From the diagram, explain the Duplexer and its working principle.
• What is the full form of MTI?
• What is MTI, and how does it work?
• Uses of Optical Fiber Communication.
• Frequency range in which optical fiber communication is used.
• Frequency ranges of skywave, groundwave, etc.
• Purpose of regenerative repeaters.
• Difference between transmission lines and waveguides.
• Concept of skin depth.
• Working of a P-I-N diode.
• A question related to the Doppler effect.
• They pointed to a bulb in the room and asked about its current rating.
• One additional question from basic electrical concepts (which I don’t recall exactly).

After the technical questions, we had a light, informal discussion for 3–4 minutes, and then I was asked to leave.

Key Takeaway:

• Language is not a barrier in BEL interviews. If you are not comfortable in English, you can confidently speak in Hindi.

Hope this helps future aspirants!

✅ BEL Interview Experience – ECE Discipline

Panel Questions

General / Introductory

1. Introduce yourself.
2. Questions about your work experience (domain, role, responsibilities).

Technical – Communication & Radar

3. What are the different types of propagation?
4. Explain Line-of-Sight (LOS) propagation.
5. What are the various frequency bands?
6. What are the applications of each frequency band?
7. What is Radar? (expected question based on context)
8. What is Satellite Communication (SatCom)? (expected question based on context)

Digital Electronics

9. Find the resolution of a 10-bit ADC given the full-scale reading.
10. Difference between decoders and encoders.
11. Difference between simulator and emulator.

Work-Related

12. A few questions related to your previous job responsibilities (specific to your domain).

✅ BEL Interview Experience – ECE Discipline

Domain-Specific (FPGA / VLSI)

1. Explain your final project/design in detail.
2. What was the overall architecture of your FPGA design?
3. What were the clock speeds of your FPGA design?
4. Explain the significance and importance of your design in the project.
5. Describe the flow of design and development on FPGA.
6. What tools and platforms did you use for FPGA development?
7. How do you handle timing issues in FPGA design?
8. What are the steps involved in FPGA synthesis and implementation?

Embedded Systems (Cross Questions)

9. Do you have any experience in Embedded Design?
10. What do you know about device driver development?

Programming (C Language Basics)

11. Write a simple C program (could be related to logic implementation).
12. Explain the difference between pointers and arrays in C.
13. What is the use of volatile keyword in C?

General / HR Level Observation

14. Tell me about your role and responsibilities in your current/previous organization.
15. What was your contribution to the team in terms of design improvement?
16. Why do you want to join BEL?
17. Are you open to learning new domains like Embedded or Software?

✅ Key Takeaway:

• BEL expects in-depth knowledge of your core domain (VLSI/FPGA in your case).
• They also check for basic familiarity with adjacent domains (Embedded Systems & C programming).
• Understanding the Job Description (JD) thoroughly before the interview is crucial.

✅ BEL Interview Experience – ECE Discipline

Here are some of the technical questions that were asked:

1. TV waves operate in which frequency band?
2. What do you know about Bluetooth technology?
3. Explain Load Regulation and Line Regulation.
4. What is SMPS (Switched Mode Power Supply) and its applications?
5. How do you convert one flip-flop to another (D, T, JK, SR)?
6. Questions related to Number Systems:
   • ASCII Code
   • Weighted Code
   • Excess-3 Code
7. One question based on Probability.
8. Final Year Project – Be prepared to explain it in detail, as this is one of the most important discussion points.

✅ BEL Interview Experience – ECE Discipline

Technical Questions:

1. What is a diode?
2. Explain the different uses of a diode.
3. What are the different devices used for testing circuits?
4. What is a choke (used in tube lights)?
5. What is beamwidth?
6. What is polarization?
7. Explain your final year project.
8. What was your specific contribution in the group project?

HR Questions:

9. Why should we hire you?
10. What is the first thing you will do after joining?
11. Why do you want to work in the defense sector?
12. Who is your ideal personality and why?

✅ BEL Interview Experience – ECE Discipline

1. Explain Emitter-Coupled Logic (ECL) with an example.
2. How do you design a logarithmic and antilogarithmic amplifier using an Op-Amp?
3. Describe the device structure of CMOS.
4. Explain the working of an Integrator circuit using an Op-Amp.
5. What is QAM (Quadrature Amplitude Modulation)? What are its advantages?
6. Explain the concept of a Phase-Locked Loop (PLL).
7. What is Inter-Symbol Interference (ISI)? Explain its significance.
8. In what situations is Amplitude Modulation (AM) preferred over Frequency Modulation (FM)?