1z1-809證照指南 & 1z1-809考題在21世紀這個IT行業如此輝煌的時代，競爭是很激烈的。理所當然的，在IT行業中Oracle 1z1-809認證考試成為了一個很熱門的考試。報名參加考試的人越來越多，並且能通過這個認證考試也是那些雄心勃勃的IT專業人士的夢想。
為了準備考試，考生需要對Java SE 8功能及其應用有很好的理解。他們還應熟悉Java開發工具和框架，例如Eclipse，Maven和Spring。有許多資源可幫助考生準備考試，包括在線課程，學習指南，練習測試和論壇。 最新的 Java SE 1z1-809 免費考試真題 (Q123-Q128):問題 #123
Given the structure of the EHF and DEPT tables:
Given the code fragment:
What is the result?
A. The code prints only the first record of the EM? table.
B. The code prints all of the records in the EM? table but not with the respective department names.
C. The code prints all of the records in the EMP table along with the respective department names.
D. The code throws a syntax error at ResultSet because the semicolon ( is missing.
答案：B
問題 #124
Given the code fragment:
What is the result?
A. A compilation error occurs at line n1.
B. A compilation error occurs at line n2.
C. The code reads the password without echoing characters on the console.
D. A compilation error occurs because the IOException isn't declared to be thrown or caught?
答案：A
問題 #125
Given:
final class Folder {//line n1
//line n2
public void open () {
System.out.print("Open");
}
}
public class Test {
public static void main (String [] args) throws Exception {
try (Folder f = new Folder()) {
f.open();
}
}
}
Which two modifications enable the code to print Open Close?
A. Replace line n1 with:
class Folder implements AutoCloseable {
B. Replace line n1 with:
class Folder extends Closeable {
C. Replace line n1 with:
class Folder extends Exception {
D. At line n2, insert:
public void close () throws IOException {
System.out.print("Close");
}
E. At line n2, insert:
final void close () {
System.out.print("Close");
}
答案：A,D
問題 #126
Given the code fragments:
public class Book implements Comparator<Book> {
String name;
double price;
public Book () {}
public Book(String name, double price) {
this.name = name;
this.price = price;
}
public int compare(Book b1, Book b2) {
return b1.name.compareTo(b2.name);
}
public String toString() {
return name + ":" + price;
}
}
and
List<Book>books = Arrays.asList (new Book ("Beginning with Java", 2), new book ("A
Guide to Java Tour", 3));
Collections.sort(books, new Book());
System.out.print(books);
What is the result?
A. An Exception is thrown at run time.
B. [A Guide to Java Tour:3, Beginning with Java:2]
C. [Beginning with Java:2, A Guide to Java Tour:3]
D. A compilation error occurs because the Book class does not override the abstract method compareTo().
答案：B
問題 #127
Which statement is true about the single abstract method of the java.util.function.Function interface?
A. It accepts one argument and always produces a result of the same type as the argument.
B. It accepts an argument and produces a result of any data type.
is missing.
