Test Index

Multi Threading

Question : 19

Total: 44

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?

Compilation fails.
An exception is thrown at runtime
Synchronizing the run() method would make the class thread-safe.
The data in variable "x" are protected from concurrent access problems.
Declaring the doThings() method as static would make the class thread-safe.
Wrapping the statements within doThings() in a synchronized(new Object()) { } block would make the class thread-safe.

Validate

Go to Question:

Prev Question

Next Question