Exam 21: Multithreading

Examine the SharedData class shown below. Suppose two threads are created so that each has access to the same SharedData object. Thread one calls setSharedData eight times with values 1...8 respectively, sleeping for 30 milliseconds between calls. Thread two calls getSharedData eight times, also sleeping for 30 milliseconds between calls. Suppose thread two receives values 1, 2, 3, 4, 5, 6, 7, 8 respectively on its calls. Should we expect the same values for each program run? public class SharedData { Private int value; Public void setSharedData(int n) { Value = n; } Public int getSharedData() { Return value; } }

Class MyClass has two ReentrantLock objects, myLock1 and myLock2. Suppose thread one acquires myLock1 as it enters methodX and immediately completes its CPU time slice. After thread two enters methodY, it acquires myLock2 and tries to acquire myLock1. When thread one resumes, it tries to acquire myLock2. What will happen next?