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1z1-809 PDF DEMO:
QUESTION NO: 1
Given the code fragment:
What is the result?
A. Checking...Checking...
B. A compilation error occurs at line n1.
C. A compilation error occurs at line n2.
D. Checking...
Answer: B
QUESTION NO: 2
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.id = = b.id) {
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?
A. The program prints true.
B. A compilation error occurs. To ensure successful compilation, replace line n2 with:System.out.println (b1.equals((Object) b2));
C. A compilation error occurs. To ensure successful compilation, replace line n1 with:boolean equals
(Book obj) {
D. The program prints false.
Answer: D
QUESTION NO: 3
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. Replace line 27 with:throw e;
B. Comment the lines 28, 29 and 30.
C. Replace line 26 with:} catch (ArithmeticException | NumberFormatException e) {
D. Replace line 26 with:} catch (Exception | ArithmeticException | NumberFormatException e) {
Answer: C
QUESTION NO: 4
Given that course.txt is accessible and contains:
Course : : Java
and given the code fragment:
public static void main (String[ ] args) {
int i;
char c;
try (FileInputStream fis = new FileInputStream ("course.txt");
InputStreamReader isr = new InputStreamReader(fis);) {
while (isr.ready()) { //line n1
isr.skip(2);
i = isr.read ();
c = (char) i;
System.out.print(c);
}
} catch (Exception e) {
e.printStackTrace();
}
}
What is the result?
A. ueJa
B. The program prints nothing.
C. ur :: va
D. A compilation error occurs at line n1.
Answer: A
QUESTION NO: 5
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 = null;
Optional<Address> addrs1 = Optional.ofNullable (address);
Employee e1 = new Employee (addrs1);
String eAddress = (addrs1.isPresent()) ? addrs1.get().getCity() : "City Not available"; What is the result?
A. City Not available
B. null
C. New York
D. A NoSuchElementException is thrown at run time.
Answer: A
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Updated: May 28, 2022