Answer Posted / brajesh nath tripathi

java is platform independent because it follows the three
basic rules
According to these rule there should not any coupling
between operating system and java program /application
1:-Application developing time coupling
JAVA never use any operating system function in developing
java application
2 compilation time coupling
that is only Java Run Time environment is responsible to
load and compile the any java program
hence there is no role of operating system
3:-Execution time coupling
in java Run Time environment JVM has responsibility to
execute the java program hence there is no role of OS
since java follow these three rule hence java is a platform
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