Armstrong Robotics & Technologies Private Limited Senior Electrical Design Engineer Interview Questions and Answers

Q1. What is a stack ? Write it implementation
Ans. 
A stack is a data structure that follows the Last In First Out (LIFO) principle.
• Stack is a collection of elements with two main operations: push (adds element) and pop (removes top element)

• Common implementations include using arrays or linked lists

• Example: Undo feature in text editors uses a stack to store previous states
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Q2. How could we optimize a stack optimization
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Optimizing a stack involves reducing unnecessary operations and improving memory usage.
• Implementing tail call optimization to reduce stack space usage

• Using iterative algorithms instead of recursive ones to avoid stack overflow

• Minimizing the number of local variables stored on the stack

• Using dynamic memory allocation instead of fixed-size arrays to optimize memory usage
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Q1. Database query from 2 table without a common column
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Use a JOIN statement to combine data from two tables without a common column.
• Use a JOIN statement to combine data from two tables based on a different column

• Specify the columns to select from each table in the query

• Use aliases to differentiate between columns with the same name in different tables
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Q2. Design a Flight booking system
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Design a flight booking system with user authentication, flight search, booking, seat selection, and payment handling.
• Implement user authentication for secure access.

• Create a database of flights with availability and pricing.

• Allow users to search for flights based on criteria like date, destination, and number of passengers.

• Provide seat selection options for users during booking.

• Include a payment gateway for secure tra...read more
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Q1. Tell me about your project
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I developed a web application for tracking and managing inventory in a retail store.
• Used React.js for front-end development

• Implemented RESTful APIs using Node.js and Express for back-end

• Utilized MongoDB for database management
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Q2. Tell me what is flow of your project
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The flow of the project involves requirements gathering, design, development, testing, deployment, and maintenance.
• Requirements gathering: Understand client needs and document project requirements.

• Design: Create a detailed design plan including architecture and user interface.

• Development: Write code based on design specifications.

• Testing: Conduct various tests to ensure the software functions correctly.

• Deployment: Rele...read more
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Q1. React , hooks concept
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Q2. Bootstrap- UI and related questions
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Q1. Sorting methodologies
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Q2. Questions based on previous company projects
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Aptitude test is quite similar to GATE CET etc like engineering questions based on all subjects from engineering. These questions are tricky ones. Calculator is allowed while giving test.

Depending upon for which department and which software you have come for the interview, one complex 3D model is given for all candidates to perform on that particular software to analyse his/her drawing reading skills.

Q1. Basic welding information, like type of welding process and the symbols
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Q2. Geometric dimensioning and tolerancing symbols and their use.
Ans. 
Geometric dimensioning and tolerancing symbols are used to specify the dimensions, tolerances, and geometric characteristics of a part.
• GD&T symbols are used to communicate design requirements and ensure proper fit, function, and interchangeability of parts.

• Some common GD&T symbols include position, concentricity, perpendicularity, and flatness.

• These symbols are typically placed on engineering drawings and provide preci...read more
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Q3. Questions related to your projects you have done in your previous jobs. What was your role in it and challenges you faced.
Ans. Make sure you know everything you have added in your CV.
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Q4. Software related questions.
Ans. Know one thing, this is service industry, everything here is software proficiency. So prepare well.
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Q5. Domain related questions.
Ans. Read basic for the domain you are going for.
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Q1. Tell me about yourself.
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Q2. They will check if you are comfortable with flexible or project specific working timings.
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Q3. They will check if you are comfortable for late night sittings for project deliverables.
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Q1. SOM RELATED QUESTIONS SFD BMD and properties of materials
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Q2. Design calculations of ball screw, lm guides
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Q3. Pneumatic circuits
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Q4. Hardening process related questions
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Q1. Introduction your self
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I am an experienced Electrical Engineer with expertise in designing and implementing electrical systems.
• I have a Bachelor's degree in Electrical Engineering from XYZ University.

• I have worked for 5 years at ABC Company, where I designed and implemented electrical systems for commercial buildings.

• I am proficient in using CAD software for creating electrical schematics and layouts.

• I have experience in troubleshooting and ...read more
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Q2. Technical answer
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Q3. What is oms law What resistance unit
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Ohm's Law is a fundamental principle in electrical engineering that relates the current flowing through a conductor to the voltage across it and the resistance of the conductor.
• Ohm's Law states that the current (I) flowing through a conductor is directly proportional to the voltage (V) across it and inversely proportional to the resistance (R) of the conductor.

• The formula for Ohm's Law is: V = I * R, where V is the vol...read more
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Q4. What's current unit
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The current unit is the ampere (A), which measures the flow of electric charge.
• The ampere is named after the French physicist André-Marie Ampère.

• Current is the rate at which electric charge flows through a conductor.

• Other common units for current include milliamperes (mA) and microamperes (μA).
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Q5. Write the voltage unit
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The voltage unit is measured in volts (V).
• The voltage unit is denoted by the symbol V.

• Voltage is the potential difference between two points in an electrical circuit.

• Common examples of voltage units include millivolts (mV), kilovolts (kV), and megavolts (MV).
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Q1. Pneumatic safety valves
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Q2. Ball screw selection
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Q3. Hydraulics and components used in hydraulics
Ans. 
Hydraulics involve the use of fluids to transmit power in mechanical systems, with components like pumps, cylinders, valves, and hoses.
• Hydraulics use incompressible fluids to transmit power

• Components include pumps to generate fluid flow, cylinders to convert fluid power into mechanical power, valves to control flow direction, and hoses to connect components

• Common examples include hydraulic systems in heavy machinery, a
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Q4. Projects in the previous company
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Q5. What did you learn in your 1st and 2nd company
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Q1. No questions, direct salary discussion and early joining
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