QUESTION: 17

Given:

class Book {
int id;
String name;
public Book (int id, String name) {
this.id = id;
this.name = name;
}
public boolean equals (Object obj) { //line n1
boolean output = false;
Book b = (Book) obj;
if (this.name.equals(b name))}
output = true;
}
return output;
}
}

and the code fragment:

Book b1 = new Book (101, “Java Programing”);
Book b2 = new Book (102, “Java Programing”);
System.out.println (b1.equals(b2)); //line n2

Which statement is true?

The program prints true.
The program prints false.
A compilation error occurs. To ensure successful compilation, replace line n1 with:
boolean equals (Book obj) {
A compilation error occurs. To ensure successful compilation, replace line n2 with:
System.out.println (b1.equals((Object) b2));

Answer(s): A

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QUESTION: 18

Given the content of /resourses/Message.properties:
welcome1=”Good day!”

and given the code fragment:

Properties prop = new Properties ();
FileInputStream fis = new FileInputStream (“/resources/Message.properties”);
prop.load(fis);
System.out.println(prop.getProperty(“welcome1”));
System.out.println(prop.getProperty(“welcome2”, “Test”));//line n1
System.out.println(prop.getProperty(“welcome3”));

What is the result?

Good day!
Test
followed by an Exception stack trace
Good day!
followed by an Exception stack trace
Good day! Test null
A compilation error occurs at line n1.

Answer(s): C

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QUESTION: 19

Which action can be used to load a database driver by using JDBC3.0?

Add the driver class to the META-INF/services folder of the JAR file.
Include the JDBC driver class in a jdbc.properties file.
Use the java.lang.Class.forName method to load the driver class.
Use the DriverManager.getDriver method to load the driver class.

Answer(s): C

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QUESTION: 20

Given the code fragment:
Path p1 = Paths.get(“/Pics/MyPic.jpeg”);
System.out.println (p1.getNameCount() +
“:” + p1.getName(1) +
“:” + p1.getFileName());

Assume that the Pics directory does NOT exist. What is the result?

An exception is thrown at run time.
2:MyPic.jpeg: MyPic.jpeg
1:Pics:/Pics/ MyPic.jpeg
2:Pics: MyPic.jpeg

Answer(s): B

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Free Oracle 1Z0-809 Exam Questions (page: 6)

QUESTION: 17

QUESTION: 18

QUESTION: 19

QUESTION: 20

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