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JAVA INTERVIEW QUESTIONS?

Unknown

4 Jun, 2015

What do you know about Java ?

Java is a high-level programming language originally developed by Sun Microsystems and released in 1995. Java runs on a variety of platforms, such as Windows, Mac OS, and the various versions of UNIX.

List any five feautures of Java ?

Some features include Object Oriented, Platform Independent, Robust, Interpreted, Multi-threaded

How Java enabled High Performance ?

Java uses Just-In-Time compiler to enable high performance. Just-In-Time compiler is a program that turns Java bytecode, which is a program that contains instructions that must be interpreted into instructions that can be sent directly to the processor.

What are the supported platforms of Java Programming Language ?

Java runs on a variety of platforms, such as Windows, Mac OS, and the various versions of UNIX/Linux like HP-Unix, Sun Solaris, Redhat Linux, Ubuntu, CentOS, etc.

Why is Java Architectural Neutral ?

It’s compiler generates an architecture-neutral object file format, which makes the compiled code to be executable on many processors, with the presence of Java runtime system

List two Java IDE's ?

Netbeans, Eclipse, etc.

Why Java is considered Dynamic ?

It is designed to adapt to an evolving environment. Java programs can carry extensive amount of run-time information that can be used to verify and resolve accesses to objects on run-time.

What is Java Virtual Machine and how it is considered in context's of Java's Platform independent feautures ?

When Java is compiled, it is not compiled into platform specific machine, rather into platform independent byte code. This byte code is distributed over the web and interpreted by virtual Machine (JVM) on whichever platform it is being run.

List some Java keywords (Unlike C, C++ keywords) ?

Some Java keywords are import, super, finally, etc.

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