1Z0-853 試験問題を無料オンラインアクセス

Click the Exhibit button.
What is the output if the main() method is run?

• A.Compilation fails.
• B.9
• C.8
• D.4
• E.It is impossible to determine for certain.
• F.An exception is thrown at runtime.
• G.5

Click the Exhibit button.
Given:
25.
try {
26.
A a = new A();
27.
a.method1();
28.
} catch (Exception e) {
29.
System.out.print("an error occurred");
30.
}
Which two statements are true if a NullPointerException is thrown on line 3 of class C? (Choose two.)

• A.The code on line 5 of class B will execute.
• B.The exception will be propagated back to line 27.
• C.The code on line 29 will be executed.
• D.The code on line 5 of class A will execute.
• E.The application will crash.

Given:
1.public class TestFive {
2.private int x;
3.public void foo() {
4.int current = x;
5.x = current + 1;
6.}
7.public void go() {
8.for(int i = 0; i < 5; i++) {
9.new Thread() {
10.
public void run() {
11.
foo();
12.
System.out.print(x + ", ");
13.
} }.start();
14.
} }
Which two changes, taken together, would guarantee the output: 1, 2, 3, 4, 5, ? (Choose two.)

• A.change the variable declaration on line 2 to private volatile int x;
• B.wrap the code inside the foo() method with a synchronized( this ) block
• C.wrap the for loop code inside the go() method with a synchronized block synchronized(this) { // for loop code here }
• D.move the line 12 print statement into the foo() method
• E.change line 7 to public synchronized void go() {

Given:
35.
String #name = "Jane Doe";
36.
int $age = 24;
37.
Double _height = 123.5;
38.
double ~temp = 37.5;
Which two statements are true? (Choose two.)

• A.Line 35 will not compile.
• B.Line 38 will not compile.
• C.Line 36 will not compile.
• D.Line 37 will not compile.

DRAG DROP
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正解：