hi all these are the questions from a mock exam. i'm unable to find the right answer. can any body help me find right answers and with little explanation on how it works. Question no 1 class A { private static int x = 0; synchronized int increment() { int n=x; x = n + 1; return n; } } Is class A thread-safe? Why or why not? Choice 1 No, because increment() operates on variables outside its scope Choice 2 No, because "x" is static, and vulnerable to threads operating on different instances Choice 3 Yes, because its only method, increment(), must acquire the object's monitor Choice 4 Yes, because increment() is synchronized Choice 5 Yes, because "x" is private and not available to outside threads question no 2 How could you coordinate two threads that execute simultaneously inside synchronized methods of the same object? Choice 1 place the threads in the same ThreadGroup and let the ThreadGroup acquire the object's monitor Choice 2 use Thread.wait() and Thread.notify() Choice 3 dynamically control the priorities of the threads within the method Choice 4 use Thread.yield() to switch between threads at set points Choice 5 use Thread.sleep()
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