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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?