Explain What is a chain of responsibility pattern ?

The chain-of-responsibility pattern is a design pattern consisting of a source of command objects and a series of processing objects. Each processing object contains a set of logic that describes the types of command objects that it can handle, and how to pass off those that it cannot handle to the next processing object in the chain.

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What is Aggregation ?

Aggregation is a form of composition where one looks at the system as a whole rather than as parts.

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What is Composition ?

Composition is a way to combine simple objects or data types into more complex ones.

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What is Association ?

Association defines a relationship between classes of objects which allows one object to cause another to perform an action on its behalf.

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What is Polymorphism ?

A feature using which more than one definition is given to a single method or operator.

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What is Encapsulation ?

It is a feature which hides data and functions from others classes.

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What is Hybrid Inheritance ?

A class inherits from more than one type of Inheritances mentioned above.
Ex:
It inherits from multiple and also multilevel

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What is Multilevel Inheritance ?

classes inherits from parent classes in multiple level, ie Child inherits from Parent and grandchild classes inherit from Child , like that.

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What is Multiple Inheritance ?

A class inherits from more than 1 class.

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What is a Single Inheritance ?

A class inherits from a single class.

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What are the major Types of Inheritance ?

The major Types are:
Single
Multiple
Multilevel
Hybrid

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What is Inheritance ?

A feature in which the base class’s characteristics and behavior are derived to the child class also.

What is an Object ?

Is an instance of a class. It will be exactly the same as a class but can be assigned values and used whereas a class can’t be used without creating objects.

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What is a Class ?

Class:
It defines characteristics of a thing and its behavior. It is blueprint based on which objects are created.
Example: Employee (which will have all the details about the employee like name, id, salary, etc and the methods which describes his behavior like calcSalary(),displaydetails(),etc.

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What are the 3 important object oriented concepts ?

1. Polymorphism
2. Inheritance
3. Encapsulation

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What are the different ways a method can be overloaded ?

1. With different number of arguments
2. With different datatypes of arguments
3. With different order of arguments

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Can you declare an overriden method to be static if the original method is not static ?

No.

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What’s the implicit name of the parameter that gets passed into the set method/property of a class?

Value.

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Can a method alone be sealed ?

Yes.

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How will you prevent your class being inherited by another class ?

Make that class as Sealed.

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