Xiaomi Application Support Engineer Interview Questions and Answers

Q1. Explain 4 main part of OOPs.
Ans. 
OOPs stands for Object-Oriented Programming and has 4 main parts: Inheritance, Encapsulation, Polymorphism, and Abstraction.
• Inheritance: Allows a class to inherit properties and behavior from another class.

• Encapsulation: Bundles data and methods that operate on the data into a single unit.

• Polymorphism: Allows objects to be treated as instances of their parent class.

• Abstraction: Hides complex implementation details and
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Q2. What is difference between Abstract class and Interfce?
Ans. 
Abstract class can have both abstract and non-abstract methods, while Interface can only have abstract methods.
• Abstract class can have constructors, fields, and methods, while Interface cannot have any implementation.

• A class can extend only one Abstract class but can implement multiple Interfaces.

• Abstract classes are used to define a common behavior for subclasses, while Interfaces are used to define a contract for cla...read more
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Q3. What are solid principle?
Ans. 
SOLID principles are a set of five design principles that help developers create more maintainable and scalable software.
• Single Responsibility Principle (SRP) - A class should have only one reason to change.

• Open/Closed Principle (OCP) - Software entities should be open for extension but closed for modification.

• Liskov Substitution Principle (LSP) - Objects of a superclass should be replaceable with objects of its subcla...read more
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Q1. Difference between Conduction, convection and radiation. Also basic of Heat Transfer.
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Q2. Which material is used in coil section of any HVAC equipment and reason why??
Ans. 
Copper is commonly used in the coil section of HVAC equipment due to its high thermal conductivity and corrosion resistance.
• Copper is preferred for its excellent heat transfer properties

• Copper is resistant to corrosion, ensuring longevity of the coil section

• Aluminum is also used in some cases for its lightweight nature and cost-effectiveness
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Average, Profit and loss questions.

Q1. Question about BIM
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Q1. Background verification
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