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Question ID 3873

Given:
1.    public class TestSeven extends Thread {
2.    private static int x;
3.    public synchronized void doThings() {
4.    int current = x;
5.    current++;
6.    x = current;
7.    }
8.    public void run() {
9.    doThings();
10.    }
11.}
Which statement is true?

Option A

A. Compilation fails.
 

Option B

B.    An exception is thrown at runtime.
 

Option C

C.    Synchronizing the run() method would make the class thread-safe.
 

Option D

D.    The data in variable "x" are protected from concurrent access problems.
 

Option E

E.    Declaring the doThings() method as static would make the class thread-safe.
 

Correct Answer E
Explanation


Question ID 3874

Which two code fragments will execute the method doStuff() in a separate thread? (Choose two.)
 

Option A

A.    new Thread() {
public void run() { doStuff(); } };
 

Option B

B.    new Thread() {
public void start() { doStuff(); } };
 

Option C

C.    new Thread() {
public void start() { doStuff(); } }.run();
 

Option D

D.    new Thread() {
public void run() { doStuff(); } }.start();
 

Option E

E.    new Thread(new Runnable() { public void run() { doStuff(); } }).run();
 

Option F

F.    new Thread(new Runnable() { public void run() { doStuff(); } }).start();
 

Correct Answer D,F
Explanation

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