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[Hardware] 100% Pass Quiz 2026 Newest Oracle 1z1-809: Java SE 8 Programmer II Book Pdf

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【Hardware】 100% Pass Quiz 2026 Newest Oracle 1z1-809: Java SE 8 Programmer II Book Pdf

Posted at 16 hour before      View：2 | Replies：0        Print      Only Author   [Copy Link] 1#
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Oracle 1z1-809 (Java SE 8 Programmer II) Exam is a certification exam designed for experienced Java programmers who want to demonstrate their expertise in Java SE 8 programming. 1z1-809 exam is a prerequisite for obtaining the Oracle Certified Professional, Java SE 8 Programmer certification. Candidates who Pass 1z1-809 Exam demonstrate their advanced knowledge of Java programming concepts and the ability to apply them to real-world programming tasks.
Oracle Java SE 8 Programmer II Sample Questions (Q82-Q87):NEW QUESTION # 82
Given the code fragments:
class Employee {
Optional<Address> address;
Employee (Optional<Address> address) {
this.address = address;
}
public Optional<Address> getAddress() { return address; }
}
class Address {
String city = "New York";
public String getCity { return city: }
public String toString() {
return city;
}
}
and
Address address = new Address;
Optional<Address> addrs1 = Optional.ofNullable (address);
Employee e1 = new Employee (addrs1);
String eAddress = (addrs1.isPresent()) ? addrs1.get().getCity() : "City Not available"; System.out.println(eAddress); What is the result?
  • A. City Not available
  • B. New York
  • C. A NoSuchElementException is thrown at run time.
  • D. null
Answer: D

NEW QUESTION # 83
Given the code fragments:
4.void doStuff() throws ArithmeticException, NumberFormatException, Exception {
5.if (Math.random() >-1 throw new Exception ("Try again");
6.} and
24.
try {
25.
doStuff ( ):
26.
} catch (ArithmeticException | NumberFormatException | Exception e) {
27.
System.out.println (e.getMessage()); }
28.
catch (Exception e) {
29.
System.out.println (e.getMessage()); }
30.
}
Which modification enables the code to print Try again?
  • A. Comment the lines 28, 29 and 30.
  • B. Replace line 27 with:
    throw e;
  • C. Replace line 26 with:
    } catch (ArithmeticException | NumberFormatException e) {
  • D. Replace line 26 with:
    } catch (Exception | ArithmeticException | NumberFormatException e) {
Answer: C

NEW QUESTION # 84
Given:
final class Folder {   //line n1
/ /line n2
public void open () {
System.out.print("Open");
}
}
public class Test {
public static void main (String [] args) throws Exception {
try (Folder f = new Folder()) {
f.open();
}
}
}
Which two modifications enable the code to print Open Close?
  • A. At line n2, insert:
    final void close () {
    System.out.print("Close");
    }
  • B. Replace line n1 with:
    class Folder extends Closeable {
  • C. Replace line n1 with:
    class Folder implements AutoCloseable {
  • D. At line n2, insert:
    public void close () throws IOException {
    System.out.print("Close");
    }
  • E. Replace line n1 with:
    class Folder extends Exception {
Answer: C,E

NEW QUESTION # 85
Given the code fragment:
public void recDelete (String dirName) throws IOException {
File [ ] listOfFiles = new File (dirName) .listFiles();
if (listOfFiles ! = null && listOfFiles.length >0) {
for (File aFile : listOfFiles) {
if (!aFile.isDirectory ()) {
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 executes and does not make any changes to the Projects directory.
  • B. The method deletes the .class files of the Projects directory only.
  • C. The method throws an IOException.
  • D. The method deletes all the .class files in the Projects directory and its subdirectories.
Answer: B

NEW QUESTION # 86
Given the code fragment:
UnaryOperator<Integer> uo1 = s -> s*2;   line n1
List<Double> loanValues = Arrays.asList(1000.0, 2000.0);
loanValues.stream()
.filter(lv -> lv >= 1500)
.map(lv -> uo1.apply(lv))
.forEach(s -> System.out.print(s + " "));
What is the result?
  • A. A compilation error occurs at line n1.
  • B. 0
  • C. 4000.0
  • D. A compilation error occurs at line n2.
Answer: D
Explanation:
Explanation/Reference:

NEW QUESTION # 87
......
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