Ultimate Guide to Prepare Free Oracle 1Z0-819 Exam Questions and Answer
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NEW QUESTION 111
Given:
You want to obtain the Stream object on reading the file. Which code inserted on line 1 will accomplish this?
- A. Stream<String> lines = Files.lines(INPUT_FILE_NAME);
- B. var lines = Files.lines(Paths.get(INPUT_FILE_NAME));
- C. Stream lines = Files.readAllLines(Paths.get(INPUT_FILE_NAME));
- D. var lines = Files.readAllLines(Paths.get(INPUT_FILE_NAME));
Answer: D
NEW QUESTION 112
Given:
Which annotation should be used to remove warnings from compilation?
- A. @SuppressWarnings("unchecked") on main and @SafeVarargs on the print method
- B. @SuppressWarnings("all") on the main and print methods
- C. @SuppressWarnings("rawtypes") on main and @SafeVarargs on the print method
- D. @SuppressWarnings on the main and print methods
Answer: A
Explanation:
NEW QUESTION 113
Given:
What is the result?
- A. [0,0] = Red[0,1] = White[1,0] = Black[2,0] = Blue[2,1] = Yellow[2,2] = Green[2,3] = Violet
- B. java.lang.ArrayIndexOutOfBoundsException thrown
- C. [0,0] = Red[1,0] = Black[2,0] = Blue
- D. [0,0] = Red[0,1] = White[1,0] = Black[1,1] = Blue[2,0] = Yellow[2,1] = Green[3,0] = Violet
Answer: A
Explanation:
NEW QUESTION 114
Given the formula to calculate a monthly mortgage payment:
and these declarations:
How can you code the formula?
- A. m = p * (r * Math.pow(1 + r, n) / Math.pow(1 + r, n) - 1);
- B. m = p * ((r * Math.pow(1 + r, n) / (Math.pow(1 + r, n)) - 1));
- C. m = p * (r * Math.pow(1 + r, n) / (Math.pow(1 + r, n) - 1));
- D. m = p * r * Math.pow(1 + r, n) / Math.pow(1 + r, n) - 1;
Answer: C
NEW QUESTION 115
Given the Customer table structure:
* ID Number Primary Key
* NAME Text Nullable
Given code fragment:
Which statement inserted on line 14 sets NAME column to a NULL value?
- A. Stmt.setNull(2, java,sql. Types, VARCHAR);
- B. Stmt.setNull(2, null);
- C. Stmt.setNull(2, java.lang, string);
- D. Stmt.setNull(2 string, class);
Answer: A
NEW QUESTION 116
Given:
executed using this command:
java Myclass My Car is red
What is the output of this class?
- A. java--Myclass--My
- B. Car--red--My
- C. Myclass--Car--red
- D. My--Car--is
- E. My--is--java
Answer: B
NEW QUESTION 117
Examine this excerpt from the declaration of the java.se module:
What does the transitive modifier mean?
- A. Any module that requires the java.sql module does not need to require the java.se module.
- B. Only a module that requires the java.se module is permitted to require the java.sql module.
- C. Any module that requires the java.se module does not need to require the java.sql module.
- D. Any module that attempts to require the java.se module actually requires the java.sql module instead.
Answer: B
NEW QUESTION 118
Given:
LocalDate d1 = LocalDate.of(1997,2,7);
DateTimeFormatter dtf =
DateTimeFormatter.ofPattern( /*insert code here*/ );
System.out.println(dtf.format (d1));
Which pattern formats the date as Friday 7th of February 1997?
- A. "eeee d'th of' MMMM yyyy"
- B. "eeee dd'th of' MMM yyyy"
- C. "eeee dd+"th of"+ MMM yyyy"
- D. "eeee d+"th of"+ MMMM yyyy"
Answer: A
NEW QUESTION 119
Given:
executed with this command:
java Main one two three
What is the output of this class?
- A. 1) one2) two3) three
- B. The compilation fails.
- C. A java.lang.ArrayIndexOutOfBoundsException is thrown.
- D. 1) one
- E. nothing
Answer: A
NEW QUESTION 120
Your organization makes mlib.jar available to your cloud customers. While working on a code cleanup project for mlib.jar, you see this method by customers:
What security measures should be added to this method so that it meets the requirements for a customer accessible method?
- A. Create a method that validates the hostName and portNumber parameters before opening the socket.
- B.
- C. Make enableService private.
- D. Enclose the call to new Socket In an AccessController.doPrivileged block.
Answer: D
NEW QUESTION 121
Given:
What is the result?
- A. compilation error
- B. 0 5
- C. 5 12
- D. 6 13
Answer: A
Explanation:
NEW QUESTION 122
Given this requirement:
Module vehicle depends on module part and makes its com.vehicle package available for all other modules.
Which module-info.java declaration meets the requirement?
- A. Option B
- B. Option C
- C. Option A
- D. Option D
Answer: C
NEW QUESTION 123
Given:
executed using this command:
java Myclass My Car is red
What is the output of this class?
- A. java--Myclass--My
- B. Car--red--My
- C. Myclass--Car--red
- D. My--Car--is
- E. My--is--java
Answer: B
NEW QUESTION 124
Given:
What is true?
- A. This should print the same result each time the program runs.
- B. This may not print the same result each time the program runs.
- C. A NoSuchElementExceptionis thrown at run time.
- D. The compilation fails.
Answer: B
Explanation:
NEW QUESTION 125
Given:
What is the result?
- A. The compilation fails at line 8.
- B. The compilation fails at line 2.
- C. The compilation fails at line 9.
- D. Hello World
Answer: D
Explanation:
NEW QUESTION 126
Given:
You want the code to produce this output:
John
Joe
Jane
Which code fragment should be inserted on line 1 and line 2 to produce the output?
- A. Insert Comparator<Person> on line 1.
Insert
public int compare(Person person) {
return person.name.compare(this.name);
}
on line 2. - B. Insert Comparable<Person> on line 1.
Insert
public int compare(Person p1, Person p2) {
return p1.name.compare(p2.name);
}
on line 2. - C. Insert Comparator<Person> on line 1.
Insert
public int compareTo(Person person) {
return person.name.compareTo(this.name);
}
on line 2. - D. Insert Comparator<Person> on line 1.
Insert
public int compare(Person p1, Person p2) {
return p1.name.compare(p2.name);
}
on line 2.
Answer: C
NEW QUESTION 127
Given:
Which is true?
- A. The code compiles but does not print any result.
- B. The code prints 25.
- C. The code throws an exception at runtime.
- D. The code does not compile.
Answer: D
NEW QUESTION 128
Given:
It is required that if p instanceof Pair then p.isValid() returns true.
Which is the smallest set of visibility changes to insure this requirement is met?
- A. setLeft and setRight must be protected.
- B. left, right, setLeft, and setRight must be private.
- C. left and right must be private.
- D. isValid must be public.
Answer: C
NEW QUESTION 129
Given:
Which two allow a.Main to allocate a new Person? (Choose two.)
- A. In Line 1, change the access modifier to privateprivate Person() {
- B. In Line 1, change the access modifier to publicpublic Person() {
- C. In Line 1, remove the access modifierPerson() {
- D. In Line 2, change the access modifier to protectedprotected class Main {
- E. In Line 2, add extends Person to the Main classpublic class Main extends Person {and change Line 3 to create a new Main objectPerson person = new Main();
Answer: B,E
NEW QUESTION 130
Given:
Which two constructors will compile and set the class field strings? (Choose two.)
- A. Option A
- B. Option B
- C. Option C
- D. Option E
- E. Option D
Answer: C,D
NEW QUESTION 131
Assuming the Widget class has a getPrice method, this code does not compile:
Which two statements, independently, would allow this code to compile? (Choose two.)
- A. Replace line 5 with widgetStream.filter(a > ((Widget)a).getPrice() > 20.00).
- B. Replace line 4 with Stream<Widget> widgetStream = widgets.stream();.
- C. Replace line 5 with widgetStream.filter((Widget a) > a.getPrice() > 20.00).
- D. Replace line 1 with List<Widget> widgetStream = widgets.stream();.
Answer: A,B
NEW QUESTION 132
Given:
What is the result?
- A. compilation error
- B. 0 5
- C. 5 12
- D. 6 13
Answer: A
Explanation:
NEW QUESTION 133
Given the code fragment:
What change on line 1 will make this code compile?
- A. Add catch (L |N e).
- B. Add catch (L e).
- C. Add catch (N | L | M e).
- D. Add catch (M |L e).
- E. Add catch (L |M N e).
Answer: B
NEW QUESTION 134
Given the code fragment:
What is the result?
- A. 0
- B. 1
- C. 2
- D. 3
Answer: D
Explanation:
NEW QUESTION 135
Given:
Which two independent changes will make the Main class compile? (Choose two.)
- A. Move the entire Student class declaration to a separate Java file, Student.java.
- B. Change line 3 to Student student = new Student("Biology");.
- C. Change line 1 to public class Student {.
- D. Change line 2 to public Student(String classname).
- E. Change line 1 to static class Student {.
Answer: B,D
Explanation:
NEW QUESTION 136
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