Schneider Electric Backend Developer Interview Questions and Answers

Q1. Power transmission
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Q1. Electric grid stability
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Q1. Where you see yourself
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Q1. What is polymorphism in C++?
Ans. 
Polymorphism in C++ allows objects of different classes to be treated as objects of a common superclass.
• Polymorphism is achieved through virtual functions and function overriding.

• It allows for more flexibility and extensibility in code.

• Example: A base class 'Shape' with virtual function 'draw', and derived classes 'Circle' and 'Square' that override 'draw'.
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Q2. Explain how different kind of motions are achieved in a Drone
Ans. 
Different motions in a drone are achieved through varying the speed and direction of the propellers.
• Changing the speed of the propellers controls the altitude of the drone.

• Varying the speed of propellers on different sides of the drone allows it to move forward, backward, left, or right.

• Adjusting the speed of the propellers diagonally creates rotational motion for turning.

• Combining these motions enables the drone to pe
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Q3. Linux Commands?
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Q4. Explain PID controller and its tunning.
Ans. 
PID controller is a control loop feedback mechanism used in systems to control process variables.
• PID stands for Proportional, Integral, Derivative.

• Proportional term responds to the current error.

• Integral term corrects the accumulated error over time.

• Derivative term predicts future error based on current rate of change.

• Tuning involves adjusting the three parameters (P, I, D) to achieve desired system response.

• Example: I...read more
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Q1. Subject related questions from the stated field
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Q1. Explaination on company culture and joining process
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Some basic aptitude questions on hackerearth can be learned from frequently asked questions

Covering lot of different topics of computer science

Q1. 1:1 with Senior Manager
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Q2. Everything in resume
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Q3. Testing knowledge about software systems and basics of linux, coding
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Q1. 1. how is motor connected to PLC 2.use of PID controller 3. which motor is used in fans 4. Inrush current 5. Is starting current more or running current
Ans. 
Motor is connected to PLC using motor starters or variable frequency drives. PID controller is used for precise control. Fans typically use induction motors. Inrush current is the initial surge of current when a motor starts. Starting current is usually higher than running current.
• Motor is connected to PLC using motor starters or variable frequency drives

• PID controller is used for precise control of motor speed or posi...read more
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Q1. 1. General electrical questions -difference between earthing and grounding. -frequency of volt in home supply and why? -voltage of power supply in homes? 2. Diff b/w -AC & DC motor -1 phase and 3 phase m...read more
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Q1. 1. Biggest achievements 2. why do you want to work here 3. strengths and weakness 4. example where you have used your strength qualities 5. about family
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Q1. Details of OoPs concept.
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Q2. Write a program using OoPs concept
Ans. 
Program using OOPs concept
• Identify the objects and their properties

• Create classes and define their methods

• Use inheritance and polymorphism

• Encapsulate data and use access modifiers

• Example: A program to simulate a bank account
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Q3. How do code review in your project
Ans. 
Code reviews are conducted regularly to ensure code quality and adherence to coding standards.
• Code reviews are conducted by peers or senior developers.

• Reviewers check for code quality, readability, maintainability, and adherence to coding standards.

• Issues found during code review are documented and addressed by the developer.

• Code reviews are conducted regularly, either before merging code or on a scheduled basis.

• Tools ...read more
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One programming challange just to see how good you use OOPs

Q1. Introduction about your work and Tech work
Ans. 
I have been working as a Software Engineer for the past 5 years, specializing in developing web applications using Java and JavaScript.
• Proficient in Java and JavaScript

• Experience in developing web applications

• Strong understanding of software development principles

• Familiarity with agile methodologies

• Knowledge of database management systems

• Experience with version control systems like Git

• Ability to work in a team and comm
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Q2. All Details of OOPs concepts
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Q3. Write a code by using OOPs technology result doesn't matter approach will be considered
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Coding Round two questions with OOPs concepts

Q1. How well do you work with a team?
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