Bar Code India Rfid Engineer Interview Questions and Answers

Q1. Asked many questions from almost all subjects of mechanical engineering after starting from favorite subject.
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Q1. Analysis of few mechanical systems. Degree of freedoms, dynamics of machine, trigonometry, geometry, vector algebra etc. Later fee computer science fundamentals were asked followed by bit more level of dsa...read more
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Q1. Why you want to work here. What makes you more preferable candidate than others. Are you willing to work from pune. Explained working culture and asked if I am comfortable with it. Salary expectations etc
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Q1. How much current takes 1mm2 wire??
Ans. 
The amount of current that a 1mm2 wire can carry depends on various factors.
• The current carrying capacity of a wire depends on its material, temperature, and insulation.

• Copper wires typically have a higher current carrying capacity compared to aluminum wires.

• The current rating of a wire is usually specified by its manufacturer.

• The current carrying capacity can be affected by factors such as wire length and ambient temp...read more
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Q2. What is resistivity????
Ans. 
Resistivity is a measure of a material's ability to resist the flow of electric current.
• Resistivity is the inverse of conductivity.

• It is a property of a material that determines how strongly it resists the flow of electric current.

• Resistivity is measured in ohm-meters (Ω·m).

• Materials with high resistivity, such as rubber or glass, are insulators.

• Materials with low resistivity, such as copper or silver, are conductors.
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Q3. Drive Parameters???????
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Q4. Why do you want to join?????
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Q5. Panel wiring and testing
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First they conducted the testing round that is pseudo code only 2 they conducted.

In laptop then they conducted aptitude, logical reasoning and java mcqs

Q1. First the panel asked self introduction then oops concept and joins how many types of joins are there then normalization and view.
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Q2. Difference between delete and truncate
Ans. 
Delete removes rows one by one, while truncate removes all rows at once.
• Delete is a DML command, while truncate is a DDL command.

• Delete can be rolled back, while truncate cannot be rolled back.

• Delete fires triggers, while truncate does not fire triggers.
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Q1. Explain Oops concepts in c# Solid and design principles Task vs thread Difference between interface and abstract class
Ans. 
OOPs concepts in C#, SOLID and design principles, Task vs Thread, Interface vs Abstract class
• OOPs concepts in C# include encapsulation, inheritance, polymorphism, and abstraction

• SOLID principles are Single Responsibility, Open/Closed, Liskov Substitution, Interface Segregation, and Dependency Inversion

• Task is a unit of work in C# that represents an asynchronous operation, while Thread is a separate path of execution wi...read more
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Q1. Same as 1 st round with programing questions
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Q1. Explain singleton design pattern, And general questions
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It was simple mostly asked basic coding questions

Q1. Interviewed with ceo
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Q2. What is your background and things?
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Q1. Mostly technical questions were asked
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Two coding questions along with 10 technical mcq questions

Q1. Coding questions like printing inverted pyramid
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Q2. All the key concepts in C#
Ans. 
Key concepts in C# include classes, objects, inheritance, polymorphism, encapsulation, and exception handling.
• Classes: Blueprint for creating objects

• Objects: Instances of classes that hold data and behavior

• Inheritance: Allows a class to inherit properties and methods from another class

• Polymorphism: Ability to use a single interface to represent different types of objects

• Encapsulation: Bundling of data and methods into ...read more
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Q1. General attitude related questions
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Q2. Questions related to work ethics you practice
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Q1. Interface why we use Basic OOPs Sorting Algo
Ans. 
Interfaces are used in OOP to define a contract for classes to implement, allowing for polymorphism and loose coupling.
• Interfaces in OOP define a set of methods that a class must implement, providing a contract for behavior.

• Interfaces allow for polymorphism, where different classes can be treated as instances of the same interface.

• Interfaces promote loose coupling between classes, as they only need to know about the in...read more
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Coding Test involved some MCQ and a question

Q1. Mostly Software Related question on DSA
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Q2. Arrays and strings
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DSA questions were there and behavioural