Java SE 7 Programmer I

Within main, the local variable 'z' is assigned the value 6, which is then printed, leading to the output of 6. When 'doStuff()' is called, a new local variable 'z' is declared and assigned the value 5. The 'doStuff2()' method modifies the instance variable 'z' of the 'ScopeTest' class to 4. However, the local variable 'z' within 'doStuff()' remains 5, so the value 5 is printed next. Returning to 'main', the local 'z' still retains the value 6, which is printed once more. Lastly, 'myScope.z' is printed, which now holds the value 4 due to the 'doStuff2()' method. Thus, the final output is 6, 5, 6, 4.

The code first initializes the variable `b` to 4. The statement `b--` decreases the value of `b` by 1, changing it to 3. The statement `--b` is then executed, which decreases `b` by 1 again, changing it to 2, and this value is printed. Finally, the current value of `b`, which is now 2, is printed again. Therefore, the output is 2 and 2.

The first println statement, System.out.println(array[4][1]);, works fine. It selects the element with index 4, {0, 4, 8, 12, 16}, and from this array, it selects the element with index 1, which is 4. The second println statement, however, is written incorrectly. The correct syntax should be System.out.println(array[1][4]);. As written, it would cause a compilation error due to incorrect syntax. If corrected, it would also fail at runtime with an ArrayIndexOutOfBoundsException since array[1] has only 2 elements and accessing index 4 is out of bounds.