Explain volatile variables in Java?
A volatile variable is basically a keyword that is used to ensure and address the visibility of changes to variables in multithreaded programming. This keyword cannot be used with classes and methods, instead can be used with variables. It is simply used to achieve thread-safety. If you mark any variable as volatile, then all the threads can read its value directly from the main memory rather than CPU cache, so that each thread can get an updated value of the variable.
