Core Java - Interview Questions and Answers
Why Core Java Interview Questions?
In this section you can learn and practice interview questions based on "Core Java" and improve your skills in order to face the interview, competitive examination and various entrance tests (CAT, GATE, GRE, MAT, Bank Exam, Railway Exam etc.) with full confidence.
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How to answer Core Java interview questions?
You can easily answer the interview questions based on Core Java by practicing the exercises given below.
What is the most important feature of Java?
Java is a platform independent language.
What do you mean by platform independence?
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
What is a JVM?
JVM is Java Virtual Machine which is a run time environment for the compiled
java class files.
Are JVM's platform independent?
JVM's are not platform independent. JVM's are platform specific run time
implementation provided by the vendor.
What is the difference between a JDK and a JVM?
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.
What is a pointer and does Java support pointers?
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.