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How can you identify which file is the java source code? What can you do with...

How can you identify which file is the java source code?

What can you do with java byte code?

What can you do with java source code?

Be able to know the difference between a statement, an expression and a literal.

What is the value of a literal (as in, what is the literal that represents the int zero)?

What is the value of a literal (as in, what is the literal that represents the capital letter A)?

What is the purpose of a comment?

What is the difference between a block comment and a line comment?

Where does a line comment go in a line?

What are the rules to name an identifier?

What is an identifier?

What are primitive data types?

What is the difference between how int/double/char/and String are stored (how many bytes each)?

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Answer #1

1)

The java file can be identified by using ( .java ) extension. The file name along with .java is used to save a java source file .

For example : file.java is the way to represent and identify java file containing source code.

2)

When a user compile a Java source code then it converts to byte code which is a machine understandable code. So it is said to be machine level language.

Java is platform independent because of byte code. It is not a runnable code , with the help of interpreter JVM( java virtual machine), the byte code gets executed. So java acts like write once and read anywhere because of portability. Java virtual machine is dependent on instructions of java bytecode.

Source java file Code Compiler bytecode loclass file JVM Machine code

3)

The java source code is written by a Java developer or professional java programmer for getting desired output with given inputs. On successful execution with efficient output which the code can be further used in real time applications to help the society.

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