Java SE 8 Programmer II (1z0-809日本語版) (1z0-809日本語) Free Practice Test

Question 1

Given:
Item table
ID, INTEGER: PK
DESCRIP, VARCHAR(100)
PRICE, REAL
QUANTITY< INTEGER
And given the code fragment:
9. try {
10.Connection conn = DriveManager.getConnection(dbURL, username,
password);
11. String query = "Select * FROM Item WHERE ID = 110";
12. Statement stmt = conn.createStatement();
13. ResultSet rs = stmt.executeQuery(query);
14.while(rs.next()) {
15.System.out.println("ID:" + rs.getInt("Id"));
16.System.out.println("Description:" + rs.getString("Descrip"));
17.System.out.println("Price:" + rs.getDouble("Price"));
18. System.out.println(Quantity:" + rs.getInt("Quantity"));
19.}
20. } catch (SQLException se) {
21. System.out.println("Error");
22. }
Assume that:
- The required database driver is configured in the classpath.
- The appropriate database is accessible with the dbURL, userName, and
passWord exists.
- The SQL query is valid.
What is the result?

A. The code prints information about Item 110.

B. An exception is thrown at runtime.

C. The code prints Error.

D. Compilation fails.

Correct Answer: A

Question 2

コードの断片を考えると：
Map<Integer, String> books = new TreeMap<>();
books.put (1007, "A");
books.put (1002, "C");
books.put (1003, "B");
books.put (1003, "B");
System.out.println (books);
結果は何ですか？

A. {1002=C, 1003=B, 1007=A}

B. {1007=A, 1002=C, 1003=B, 1003=B}

C. {1007=A, 1003=B, 1003=B, 1002=C}

D. {1007=A, 1003=B, 1002=C}

Correct Answer: A

Question 3

与えられた条件:

結果はどうなりましたか？

A. MyException がスローされます。

B. コンパイル時エラーが発生します。

C. プログラムは何も印刷しません。

D. 例外がスローされます。

Correct Answer: A

Question 4

Bookクラスの定義を考えると：

Bookクラスについて正しい記述はどれですか？

A. It is defined using the singleton design pattern.

B. It is an immutable class.

C. It demonstrates polymorphism.

D. It demonstrates encapsulation.

E. It is defined using the factory design pattern.

Correct Answer: D

Question 5

Given:
class UserException extends Exception { }
class AgeOutOfLimitException extends UserException { }
and the code fragment:
class App {
public void doRegister(String name, int age)
throws UserException, AgeOutOfLimitException {
if (name.length () < 6) {
throw new UserException ();
} else if (age >= 60) {
throw new AgeOutOfLimitException ();
} else {
System.out.println("User is registered.");
}
}
public static void main(String[ ] args) throws UserException {
App t = new App ();
t.doRegister("Mathew", 60);
}
}
結果は何ですか？

A. An AgeOutOfLimitException is thrown.

B. User is registered.

C. A UserException is thrown.

D. A compilation error occurs in the main method.

Correct Answer: A

Question 6

次のコードフラグメントを考えてみましょう:

ProductCode クラスを定義するように求められています。ProductCode クラスの定義では、c1 のインスタンス化が成功し、c2 のインスタンス化でコンパイルエラーが発生するようにする必要があります。
要件を満たす ProductCode の定義はどれですか?

A. java
public class ProductCode {
private String code;
public ProductCode(String code) {
if (code == null) {
throw new IllegalArgumentException("Code cannot be null");
}
this.code = code;
}
}

B. java
public class ProductCode {
private String code;
private ProductCode(String code) {
this.code = code;
}
}

C. java
public class ProductCode {
private String code;
public ProductCode(String code) {
this.code = code;
}
}

D. java
public class ProductCode {
private String code;
public ProductCode() {
this.code = "default";
}
}

Correct Answer: B

Question 7

Given:
class Bird {
public void fly () { System.out.print("Can fly"); }
}
class Penguin extends Bird {
public void fly () { System.out.print("Cannot fly"); }
}
and the code fragment:
class Birdie {
public static void main (String [ ] args) {
fly( ( ) -> new Bird ( ));
fly (Penguin : : new);
}
/* line n1 */
}
Which code fragment, when inserted at line n1, enables the Birdie class to compile?

A. static void fly (Consumer<? extends Bird> bird) { bird.accept( ) fly ();
}

B. static void fly (Supplier<? extends Bird> bird) { LOST

C. static void fly (Supplier<Bird> bird) {
bird.get( ) fly ();
}

D. static void fly (Consumer<Bird> bird) {
bird :: fly ();
}

Correct Answer: C

Question 8

コードの断片を考えると：
LocalDate valentinesDay =LocalDate.of(2015, Month.FEBRUARY, 14);
LocalDate nextYear = valentinesDay.plusYears(1);
nextYear.plusDays(15); //line n1
System.out.println(nextYear);
結果は何ですか？

A. A compilation error occurs at line n1.

B. 2016-02-14

C. 2016-02-29

D. A DateTimeException is thrown.

Correct Answer: B

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Oracle Java SE 8 Programmer II (1z0-809日本語版) (1z0-809日本語) Free Practice Test