JAVA Theory Part 2

DEFINITIONS(Part-2)

Compiler: A software which converts high-level language to machine level language. It compiles the instructions at once and lists all the errors.

Interpreter: A software which converts High-level language to machine level language line by line. It does not move to the next line until the error is corrected.

Source Code: A set of instructions written in a high-level language which is taken as an input from the user.

Machine code: The source code which is Compiled/Interpreted is known as Machine code.

Byte Code: Bytecode is the simplest Form of Source code. The source code is compiled to an intermediate code called Bytecode. It can easily pass from one computer to another.

Object Code: The conversion of the high-level language to a machine code with help of a translator known as Object code.

Java Virtual Machine (JVM): It is a virtual processor which processes bytecode to machine code for various platforms. So, Java Interpreter is known as JVM.

Compilation: The type of language conversion is termed as Compilation.

Interpretation: The process of conversion of the language is called Interpretation.

Case Sensitive: It is a Feature of Java Programming. It differentiates between lower case and upper case Letters.

Keywords: Keywords are pre-reserved words which cannot be used as any other alternative. They are reserved words of java which carry out a value/function/task.

Java libraries: A java Library is a set of packages .Each package is made for a purpose. Ex: java.lang, java.io, java.util, etc.

Comment: Comments are used to tell the user about the purpose and action of different steps in the program. Comments increase the readability of the program. Comments are executed during the program.

Program: A program is a set of instructions, data, functions which perform a specific task.

Programming:  The Process of Executing a program is known as programming.

Function: A program module which is simultaneously used in the program at different instances to perform a task.t is also known as Method.

Syntax: It is the Structural format of various keywords of java programming. The program segments are valid only if they are in a format according to the Syntax given.

Step Value: It determines the update of the control variable of a looping structure until the test condition is false.

Body of Loop: It contains a set of statements which are executed along with the loop simultaneously.

Null Loop: A loop which does not contain any statement in the body of the loop is known as Null Loop or Bodyless Loop.

Endless Loop: A loop structure not having any end, it skips the step value of the loop structure and the test condition will be true always. So the Loop will run infinite times. This loop is called Endless loop or Infinite Loop.

Nested Loop: A loop within a loop is known as a nested loop.

Delay Loop: A loop can be used to delay for some loading during the execution. The boy of the loop does not contain any meaningful operation but it is used to Delay the Operation.