Core Java Interview Preparation Guide
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Core Java Interview Questions and Answers will guide us now that Java refers to a number of proprietary computer software products and specifications from Sun Microsystems, a subsidiary of Oracle Corporation, so learn the basic Core Java Programming with the help of this Core Java Interview Questions with Answers guide and get preparation for a job of Core Java Programming

17 Core Java Questions and Answers:

1 :: Explain about Core Java?

Java is increasingly used for middleware applications to communicate between Server and clients. Java has features such as multithreading, portability and networking capabilities. Changes in the java library made java as a favorite programming language for developers it added functionality to their scripts.
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2 :: State some advantages of Java?

Platform independence is the key feature of Java during runtime. Syntax of java is similar to the popular object oriented languages such as C and C++. Java program can eliminate most of the bugs present in the program. Manual memory allocation and de allocation feature present in Java is automated.
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3 :: State the main difference between C++ and Java?

The main difference between C++ and Java lies in multiple inheritances. Java Meta class model has a better solution than C++. Persistent objects can be implemented by features such as object serialization and reflection mechanism. GUI can be implemented easily.
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4 :: Explain about the security aspect of Java?

Java has some bugs in its applets. Java team stated that they have zero tolerance over security features and subsequent editions of Java are improving Bug free environment. Some of the features are overriding the runtime stack, disallowing the corruption of memory outside its own process, reading or writing on local files where it is actually forbidden to do these processes, etc.
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5 :: Explain about the interpreter in Java?

Machines should have Java interpreter for the Java byte code to get executed. Linking is a very easy process and this feature helps while developing applications. Java compiler which is available with software development kit is a bit slower in execution of scripts.
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6 :: Explain about the performance aspects of Core Java?

Performance of interpreted byte codes is enough but it can be improved much more than that. Byte codes are translated into machine language within no time, this speed of execution can be achieved during application compiling time. JIT compilers are also present which compile the byte codes into native code.
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7 :: Explain about the dynamic behavior of core java?

This language was designed to adapt the changing environment and behavior. New methods and instance variables can be added to the client side without any major changes happening at the client end. This function is very important for GUI builders, pluggable components, debuggers and object database.
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8 :: Explain about Java SDK?

Java SDK is not so comfortable with people used to command line interpreter. IDEs include compilers, editors, debugging facilities, drag and drop techniques, etc. This compiler strives to generate hundreds of lines in code UI. This platform may become a universal platform.
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9 :: What are the three best choices for development environment?

The three best choices for development environment include.
1) Java SDK and text editor can be a perfect choice.
2) Java SDK and a text editor which is built within the SDK.
3) Using IDE such as free Forte community edition.
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10 :: Explain about Class in Java?

In Java every thing exists within a class. It defines the behavior of the class and its characteristics. Java applications and applets are built in the class. Rules present for class name are generous and some of the basic rules are names should start with a letter after that letter they can have any combination of letters and digits. It can contain names to any length.
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