Core Java - Interview Questions and Answers for 'Sub class' | Search Interview Question

Core Java - Interview Questions and Answers for 'Sub class' - 3 question(s) found - Order By Newest

Q1. What is the difference between inner class and sub class ?

Ans. Inner Class is a class that is nested within another class whereas sub class is a class that extends or inherit another class.

Inner class can only be accessed using reference of outer class ( Class name , if inner class is static or object reference, if inner class is non static ) whereas Sub class is accessed directly.

In terms of memory, inner class is stored just like another class having it's own body whereas sub class carries the body of parent class as well as it's own fields in memory.

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Related Questions

Which of the following can be marked static ?

a. Methods , Variables and Initialization Blocks.
b. Methods , Variables , Initialization Blocks and Outer Classes and nested Classes.
c. Methods , Variables , Initialization Blocks and Outer Classes.
d. Methods , Variables , Initialization Blocks and nested Classes

Difference between nested and inner classes ?

What is a nested interface ?

Which of the following cannot be marked static ?

Explain use of nested or inner classes ?

What is the benefit of inner / nested classes ?

Explain Static nested Classes ?

Can we have an inner class within Interface ?

Upon compiling the following class, What .class files will get created

public class OuterClass{
class InnerClass{
}
}

Q2. Can an inner class be subclass of it's parent class ?

Core Java

Ans. Yes that can be done

public class OuterClass {
public class InnerClass extends OuterClass {
}
}

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Related Questions

What is the difference between inner class and sub class ?

Difference between nested and inner classes ?

What is a nested interface ?

Which of the following cannot be marked static ?

Explain use of nested or inner classes ?

What is the benefit of inner / nested classes ?

Explain Static nested Classes ?

Can we have an inner class within Interface ?

Upon compiling the following class, What .class files will get created

public class OuterClass{
class InnerClass{
}
}

Q3. Is this code legal in java i.e nested class within interface implementing the parent interface ?

public interface MyInterface {
public class MyClass implements MyInterface {
}
}

Core Java

Ans. Yes that's legal in java

Help us improve. Please let us know the company, where you were asked this question :

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Related Questions

What is the difference between inner class and sub class ?

Difference between nested and inner classes ?

What is a nested interface ?

Which of the following cannot be marked static ?

Explain use of nested or inner classes ?

What is the benefit of inner / nested classes ?

Explain Static nested Classes ?

Can we have an inner class within Interface ?

Upon compiling the following class, What .class files will get created

public class OuterClass{
class InnerClass{
}
}

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