Oracle 1Z0-850 問題集

質問 1：
Which is true?
A. The JDBC API is included in J2SE.
B. The JDBC API is an extension of the ODBC API.
C. JDBC is used to connect to MOM (Message-Oriented Middleware) products.
D. All JDBC drivers are pure Java.
正解：A

質問 2：
Which type of GUI component is NOT included in Swing?
A. Tree Table
B. File Chooser
C. Color Chooser
D. Dialog Box
正解：A

質問 3：
Click the Exhibit button. Which, inserted at line 3 of the TestDrink class, demonstrates the
"program to an interface" principle?

A. Tea aDrink = new Tea();
B. Drinkable aDrink = DrinkableFactory.getDrinkable();
C. Drinkable aDrink = new Drinkable();
D. Tea aDrink = new Drinkable();
正解：B

質問 4：
Click the Exhibit button. Which is true about the use of italics in this diagram?

A. The use of italics indicates that Blipvert is an interface.
B. The use of italics carries no standard UML meaning.
C. The use of italics indicates that Blipvert is an abstract class.
D. The use of italics indicates that Blipvert is a final class.
E. The use of italics indicates that Blipvert is an enumeration.
正解：C

質問 5：
Which two are true? (Choose two.)
A. HTML can be used only for displaying images.
B. XML is an extension of HTML.
C. HTML is the language used to publish web pages on the World Wide Web.
D. HTML is an acronym for HyperText Markup Language.
正解：C,D

質問 6：
Which two classes make valid use of the ArrayList class in package java.util? (Choose two.)
A. package java.util;
public class Test {
public static void main(String args[]) {
ArrayList list = new ArrayList();
}
B. import java.util;
public class Test {
public static void main(String args[]) {
ArrayList list = new ArrayList();
}
C. package java.util.ArrayList;
public class Test {
public static void main(String args[]) {
ArrayList list = new ArrayList();
}
D. import java.util.ArrayList;
public class Test {
public static void main(String args[]) {
ArrayList list = new ArrayList();
}
E. public class Test import java.util.ArrayList {
public static void main(String args[]) {
ArrayList list = new ArrayList();
}
F. public class Test {
public static void main(String args[]) {
java.util.ArrayList list = new java.util.ArrayList();
}
正解：D,F

質問 7：
Click the Exhibit button.
Which correctly implements the relationships shown in the diagram?

A. public class Y {
private Z[] z1and2;
public Y(Z[] z1and2) {
if (z1and2 == null || z1and2.length != 2) {
System.exit(1); // ERROR!
}
this.z1and2 = z1and2;
}
}
B. public class Z {
private Y[] y1and2;
public Z(Y[] y1and2) {
if (y1and2 == null || y1and2.length != 2) {
System.exit(1); // ERROR!
}
this.y1and2 = y1and2;
}
}
C. public class Z {
private Y y1;
private Y y2;
public Z(Y y1) {
if (y1 == null) System.exit(1); // ERROR!
this.y1 = y1;
}
public Z(Y y1, Y y2) {
this(y1);
this.y2 = y2;
}
}
D. public class Y {
private Z z1;
private Z z2;
public Y(Z z1) {
if (z1 == null) System.exit(1); // ERROR!
this.z1 = z1;
}
public Y(Z z1, Z z2) {
this(z1);
this.z2 = z2;
}
}
正解：D