Java Core Java - Technical Questions and Answers

1.	What is the most important feature of Java?
	Answer: Java is a platform independent language. Workspace Report errors ... Name : Email: View Answer

2.	What do you mean by platform independence?
	Answer: Platform independence means that we can write and compile the java code in one platform (eg Windows) and can execute the class in any other supported platform eg (Linux,Solaris,etc). Workspace Report errors ... Name : Email: View Answer

3.	What is a JVM?
	Answer: JVM is Java Virtual Machine which is a run time environment for the compiled java class files. Workspace Report errors ... Name : Email: View Answer

4.	Are JVM's platform independent?
	Answer: JVM's are not platform independent. JVM's are platform specific run time implementation provided by the vendor. Workspace Report errors ... Name : Email: View Answer

5.	What is the difference between a JDK and a JVM?
	Answer: JDK is Java Development Kit which is for development purpose and it includes execution environment also. But JVM is purely a run time environment and hence you will not be able to compile your source files using a JVM. Workspace Report errors ... Name : Email: View Answer

6.	What is a pointer and does Java support pointers?
	Answer: Pointer is a reference handle to a memory location. Improper handling of pointers leads to memory leaks and reliability issues hence Java doesn't support the usage of pointers. Workspace Report errors ... Name : Email: View Answer

7.	What is the base class of all classes?
	Answer: java.lang.Object Workspace Report errors ... Name : Email: View Answer

8.	Does Java support multiple inheritance?
	Answer: Java doesn't support multiple inheritance. Workspace Report errors ... Name : Email: View Answer

9.	Is Java a pure object oriented language?
	Answer: Java uses primitive data types and hence is not a pure object oriented language. Workspace Report errors ... Name : Email: View Answer

10.	Are arrays primitive data types?
	Answer: In Java, Arrays are objects. Workspace Report errors ... Name : Email: View Answer

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