Interview Questions and Answers for 'Gateway media' | Search Interview Question

Interview Questions and Answers for 'Gateway media' - 2 question(s) found - Order By Newest

Q1. What are the different types of inner classes ?

Core Java

Ans. Simple Inner Class,
Local Inner Class,
Anonymous Inner Class,
Static Nested Inner Class.

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Related Questions

Why do we need Inner classes ? Cant we just work with outer classes wherever we implement Inner classes ?

What is the difference between the following two code lines ?

1. new OuterClass().new InnerClass();

2. new OuterClass.InnerClass();

What is the difference between inner class and sub class ?

Which access specifier can be used with Class ?

Difference between nested and inner classes ?

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 ?

Q2. Can I import same package/class twice? Will the JVM load the package twice at runtime?

Core Java

Ans. One can import the same package or same class multiple times. Neither compiler nor JVM complains wil complain about it. And the JVM will internally load the class only once no matter how many times you import the same class.

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What are different ways to create String Object? Explain.

Difference between JVM, JRE and JDK ?

What are various types of Class loaders used by JVM ?

Explain java.lang.OutOfMemoryError ?

What are strong, soft, weak and phantom references in Java ?

Which memory areas does instance and static variables use ?

Can we call the garbage collector explicitly ?

Why Java provides default constructor ?

Different types of memory used by JVM ?

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