Refex Energy Interview Questions and Answers

Q1. What is electroplating
Ans. 
Electroplating is a process of depositing a thin layer of metal onto a conductive surface using an electric current.
• Involves immersing the object to be plated in a solution containing metal ions

• Passing an electric current through the solution causes the metal ions to be deposited onto the object

• Commonly used for decorative purposes, corrosion resistance, and improving conductivity

• Examples include chrome plating on car ...read more
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Q1. About the projects that I did in past organization and how did I use python and sql in that.
Ans. 
In my previous role, I utilized Python and SQL for data analysis, visualization, and reporting to drive business insights.
• Used Python libraries like Pandas and NumPy for data manipulation and cleaning, ensuring data integrity.

• Developed SQL queries to extract and aggregate data from relational databases, enabling efficient reporting.

• Created visualizations using Matplotlib and Seaborn in Python to present findings to sta...read more
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Q2. Technical knowledge about the green hydrogen sector (very basic)
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Interview questions to be asked

Q1. What is overall experience?
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Q2. How do you rate overall company culture?
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Q1. Tell more about product
Ans. 
Our product is a cutting-edge software solution designed to streamline operations and increase efficiency.
• Utilizes advanced algorithms to optimize processes

• Integrates seamlessly with existing systems

• Provides real-time analytics for informed decision-making
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Q2. How does it work?
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Q1. Topologies on which you worked
Ans. 
I have worked on various network topologies including star, bus, ring, mesh, and hybrid.
• Star topology: centralized network with all nodes connected to a central hub

• Bus topology: all nodes connected to a single cable

• Ring topology: each node connected to exactly two other nodes forming a ring

• Mesh topology: every node connected to every other node

• Hybrid topology: combination of two or more different topologies
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Q2. Power loss calculations, Dead time selection
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Q1. Strss vs strain curve of mild steel
Ans. 
Stress vs strain curve of mild steel shows linear elastic region, yield point, ultimate tensile strength, and fracture point.
• Mild steel exhibits linear elastic behavior up to the yield point.

• After the yield point, plastic deformation occurs until the ultimate tensile strength is reached.

• Fracture of mild steel typically occurs after the ultimate tensile strength.

• The curve shows the relationship between stress (force app...read more
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