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1Z0-809 Exam Questions & Answers

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1Z0-809 Exam Questions & Answers

Vendor: Oracle

Certifications: Oracle Database

Exam Code: 1Z0-809

Exam Name: Java SE 8 Programmer II

Updated: May 31, 2023

Q&As: 207

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Free 1Z0-809 Exam Questions in PDF Format

1Z0-809 Online Practice Questions and Answers

Questions 1

Given the code fragment:

public void recDelete (String dirName) throws IOException {

File [ ] listOfFiles = new File (dirName) .listFiles();

if (listOfFiles ! = null andand listOfFiles.length >0) {

for (File aFile : listOfFiles) {

if (aFile.isDirectory ()) {

recDelete (aFile.getAbsolutePath ());

} else {

if (aFile.getName ().endsWith (".class"))

aFile.delete ();

}

}

}

}

Assume that Projects contains subdirectories that contain .class files and is passed as an argument to the

recDelete () method when it is invoked.

What is the result?

A. The method deletes all the .class files in the Projects directory and its subdirectories.

B. The method deletes the .class files of the Projects directory only.

C. The method executes and does not make any changes to the Projects directory.

D. The method throws an IOException.

Show Answer
Questions 2

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;

}

public String getCourse() {return course;}

public String getName() {return name;}

public String getCity() {return city;}

and the code fragment:

List 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?

A. A compilation error occurs.

B. Java EE Java ME

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

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

Show Answer
Questions 3

Given:

and the code fragment:

Which code fragment can be inserted to print 13?

A. Option A

B. Option B

C. Option C

D. Option D

Show Answer More Questions

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