Oracle 1Z0-851題庫介紹

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Oracle 1Z0-851 考試概覽:

Oracle 1Z0-851 考試大綱主題:

1Z0-851 考試必讀：考生最常問的幾個問題

最新的 OCJP 1Z0-851 免費考試真題：

問題 #1

Given:
11.public static Collection get() {
12.Collection sorted = new LinkedList();
13.sorted.add("B"); sorted.add("C"); sorted.add("A");
14.return sorted;
15.}
16.public static void main(String[] args) {
17.for (Object obj: get()) {
18.System.out.print(obj + ", ");
19.}
20.}
What is the result?

A. The code runs with no output.
B. An exception is thrown at runtime.
C. A, B, C,
D. Compilation fails.
E. B, C, A,

問題 #2

Given:
11.class Snoochy {
12.Boochy booch;
13.public Snoochy() { booch = new Boochy(this); }
14.}
15.16.
class Boochy {
17.Snoochy snooch;
18.public Boochy(Snoochy s) { snooch = s; }
19.} And the statements:
21.public static void main(String[] args) {
22.Snoochy snoog = new Snoochy();
23.snoog = null;
24.// more code here
25.}
Which statement is true about the objects referenced by snoog, snooch, and booch immediately after line 23 executes?

A. Only the object referenced by booch is eligible for garbage collection.
B. Only the object referenced by snooch is eligible for garbage collection.
C. The objects referenced by snooch and booch are eligible for garbage collection.
D. None of these objects are eligible for garbage collection.
E. Only the object referenced by snoog is eligible for garbage collection.

問題 #3

DRAG DROP
Click the Task button.

問題 #4

Given:
1.public class TestOne implements Runnable {
2.public static void main (String[] args) throws Exception {
3.Thread t = new Thread(new TestOne());
4.t.start();
5.System.out.print("Started");
6.t.join();
7.System.out.print("Complete");
8.}
9.public void run() {
10.for (int i = 0; i < 4; i++) {
11.System.out.print(i);
12.}
13.}
14.}
What can be a result?

A. The code executes and prints "StartedComplete0123".
B. The code executes and prints "StartedComplete".
C. An exception is thrown at runtime.
D. The code executes and prints "Started0123Complete".
E. Compilation fails.

問題 #5

Given:
11.class Converter {
12.public static void main(String[] args) {
13.Integer i = args[0];
14.int j = 12;
15.System.out.println("It is " + (j==i) + " that j==i.");
16.}
17.}
What is the result when the programmer attempts to compile the code and run it with the command java Converter 12?

A. An exception is thrown at runtime.
B. Compilation fails because of an error in line 13.
C. It is false that j==i.
D. It is true that j==i.

問題與答案：