Given the code fragment: class CallerThread implements Callable { String str; public CallerThread(String s) {this.str=s;} public String call() throws Exception { return str.concat("Call"); } } public static void main (String[] args) throws InterruptedException, ExecutionException { ExecutorService es = Executors.newFixedThreadPool(4); //line n1 Future fl = es.submit (new CallerThread("Call")); String str = fl.get().toString(); System.out.println(str); } Which statement is true?

Question

Given the code fragment:
class CallerThread implements Callable<String> {
 String str;
 public CallerThread(String s) {this.str=s;}
 public String call() throws Exception {
 return str.concat("Call");
 }
}
public static void main (String[] args) throws InterruptedException,
 ExecutionException
{
 ExecutorService es = Executors.newFixedThreadPool(4); //line n1
 Future fl = es.submit (new CallerThread("Call"));
 String str = fl.get().toString();
 System.out.println(str);
}
Which statement is true?

Accepted Answer

B. The program prints CallCall and does not terminate.

Answer

A. The program prints Call Call and terminates.

Answer

C. A compilation error occurs at line n1.

Answer

D. An ExecutionException is thrown at run time.

Given the code fragment: class CallerThread implements Callable<String> { String str; public CallerThread(String s) {this.str=s;} public String call() throws Exception { return str.concat("Call"); }…

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