Oracle 1z0-809 Exam Questions


Vendor Name: Oracle
Certification Name:Java SE
Exam Name:Java SE 8 Programmer II

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Oracle 1z0-809 Exam Questions


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1z0-809 Exam Sample Questions:



Which three statements are benefits of encapsulation?

 

Allows a class implementation to change without changing t he clients

 

Protects confidential data from leaking out of the objects

 

Prevents code from causing exceptions

 

Enables the class implementation to protect its invariants

 

Permits classes to be combined into the same package


Allows a class implementation to change without changing t he clients


Protects confidential data from leaking out of the objects


Enables the class implementation to protect its invariants






Given the code fragment:


 

Option A

 

Option B

 

Option C

 

Option D


Option A






Given the code fragment:
Stream<Path> files = Files.walk(Paths.get(System.getProperty(“user.home”)));
files.forEach (fName -> {//line n1
try {
Path aPath = fName.toAbsolutePath();//line n2
System.out.println(fName + “:”
+ Files.readAttributes(aPath, Basic.File.Attributes.class).creationTime
());
} catch (IOException ex) {
ex.printStackTrace();
});
What is the result?

 

All files and directories under the home directory are listed along with their attributes.

 

A compilation error occurs at line n1.

 

The files in the home directory are listed along with their attributes.

 

 

 

A compilation error occurs at line n2.


All files and directories under the home directory are listed along with their attributes.






Given:

What is the result?

 

2 4 6 8

 

2 4 6 8 9

 

1 3 5 7

 

1 3 5 7 9


1 3 5 7 9






Given:
class Student {
String course, name, city;
public Student (String name, String course, String city) {
this.course = course; this.name = name; this.city = city;
}
public String toString() {
return course + “:” + name + “:” + city;
}
and the code fragment:
List<Student> stds = Arrays.asList(
new Student (“Jessy”, “Java ME”, “Chicago”),
new Student (“Helen”, “Java EE”, “Houston”),
new Student (“Mark”, “Java ME”, “Chicago”));
stds.stream()
.collect(Collectors.groupingBy(Student::getCourse))
.forEach(src, res) -> System.out.println(scr));
What is the result?

 

[Java EE: Helen:Houston]
[Java ME: Jessy:Chicago, Java ME: Mark:Chicago]

 

Java EE
Java ME

 

[Java ME: Jessy:Chicago, Java ME: Mark:Chicago]
[Java EE: Helen:Houston]

 

A compilation error occurs.


[Java ME: Jessy:Chicago, Java ME: Mark:Chicago]
[Java EE: Helen:Houston]




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