[Nov-2021] Oracle 1Z0-819 Official Cert Guide PDF
Exam 1Z0-819: Java SE 11 Developer - DumpsValid
Who should take the Java SE 11 Developer Exam Number: 1Z0-819
This exam helps students to understand the basic relational database concepts. Moreover, it will teach the students about data modeling concepts, building Entity Relationship Diagrams (ERDs), and mapping ERDs. Moreover, with this project-based learning techniques, students will be able to create and work with projects to design, implement, and demonstrate a database solution for a business or organization.
NEW QUESTION 107
Given:
What code must you insert on Line 1 to enable the code to print Hello world?
- A. Hello myH = new Hello();
Hello.Greeting myG = myH.new Hello.Greeting();
myG.sayHi(); - B. Hello myH = new Hello();
Hello.Greeting myG = myH.new Greeting();
myG.sayHi(); - C. Hello myH = new Hello(); Greeting myG = new Greeting(); myG.sayHi ();
- D. Hello.Greeting myG = new Hello.Greeting() myG.sayHi();
Answer: B
NEW QUESTION 108
Given the code fragment:
What is the result?
- A. An ArrayIndexOutOfBoundsException is thrown at runtime.
- B. abc def
- C. ab cd ef
- D. ad be cf
- E. The compilation fails.
Answer: D
NEW QUESTION 109
Given:
What is the result?
- A. java.lang.IllegalAccessException is thrown.
- B. null
- C. It fails to compile.
- D. nothing
- E. Student
Answer: C
NEW QUESTION 110
Given:
What is the result?
- A. 1.99,2.99
- B. The compilation fails.
- C. 1.99,2.99,0.0
- D. 1.99,2.99,0
Answer: B
Explanation:
NEW QUESTION 111
Given the code fragment:
What change on line 1 will make this code compile?
- A. Add catch (N | L | M e).
- B. Add catch (L e).
- C. Add catch (M |L e).
- D. Add catch (L |N e).
- E. Add catch (L |M N e).
Answer: B
NEW QUESTION 112
Given:
What is the output?
- A. A NoSuchElementException is thrown at run time.
- B. null
- C. Duke
- D. A NullPointerException is thrown at run time.
Answer: C
Explanation:
NEW QUESTION 113
Given:
What is the output?
- A. :APPLE:ORANGE:BANANA
appleorangebanana - B. :APPLE:ORANGE:BANANA
- C. APPLE:apple ORANGE:orange BANANA:banana
- D. apple:APPLE orange:ORANGE banana:BANANA
- E. appleorangebanana
:APPLE:ORANGE:BANANA
Answer: D
Explanation:
NEW QUESTION 114
Given the code fragment:
Path currentFile = Paths.get("/scratch/exam/temp.txt");
Path outputFile = Paths get("/scratch/exam/new.txt");
Path directory = Paths.get("/scratch/");
Files.copy(currentFile, outputFile);
Files.copy(outputFile, directory);
Files.delete (outputFile);
The /scratch/exam/temp.txt file exists. The /scratch/exam/new.txt and /scratch/new.txt files do not exist.
What is the result?
- A. /scratch/exam/new.txt and /scratch/new.txt are deleted.
- B. The program throws a NoSuchFileException.
- C. The program throws a FileaAlreadyExistsException.
- D. A copy of /scratch/exam/new.txt exists in the /scratch directory and /scratch/exam/new.txt is deleted.
Answer: B
Explanation:
NEW QUESTION 115
Given:
What is the result?
A)
B)
C)
D)
- A. Option C
- B. Option A
- C. Option B
- D. Option D
Answer: B
NEW QUESTION 116
Given:
public class X {
}
and
public final class Y extends X {
}
What is the result of compiling these two classes?
- A. The compilation fails because either class X or class Y needs to implement the toString() method.
- B. The compilation succeeds.
- C. The compilation fails because a final class cannot extend another class.
- D. The compilation fails because there is no zero args constructor defined in class X.
Answer: A
Explanation:
NEW QUESTION 117
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 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();
- C. In Line 1, change the access modifier to publicpublic Person() {
- D. In Line 2, change the access modifier to protectedprotected class Main {
- E. In Line 1, remove the access modifierPerson() {
Answer: B,C
NEW QUESTION 118
Given:
Automobile.java
Car.java
What must you do so that the code prints 4?
- A. Remove the parameter from wheels method in line 3.
- B. Remove abstract keyword in line 1.
- C. Add @Override annotation in line 2.
- D. Replace the code in line 2 with Car ob = new Car();
Answer: C
Explanation:
NEW QUESTION 119
Given:
Which two lines inserted in line 1 will allow this code to compile? (Choose two.)
- A. void walk(){}
- B. abstract void walk();
- C. public abstract void walk();
- D. protected void walk(){}
- E. private void walk(){}
Answer: C,D
NEW QUESTION 120
Given:
What is the result?
- A. b2
- B. b1
- C. 0
- D. 1
- E. 2
- F. b3
- G. The compilation fails due to an error in line 1.
Answer: C
Explanation:
NEW QUESTION 121
Given:
It is required that if p instanceof Pairthen p.isValid()returns true.
Which is the smallest set of visibility changes to insure this requirement is met?
- A. isValidmust be public.
- B. leftand rightmust be private.
- C. left, right, setLeft, and setRightmust be private.
- D. setLeftand setRightmust be protected.
Answer: A
NEW QUESTION 122
Which is a proper JDBC URL?
- A. http://localhost mysql.jdbc:3306/database
- B. jdbc:mysql://localhost:3306/database
- C. jdbe.mysql.com://localhost:3306/database
- D. http://localhost.mysql.com:3306/database
Answer: B
NEW QUESTION 123
Analyze the code:
Which two options can you insert inside println method to produce Global:namescope? (Choose two.)
- A. new Test().prefix+new Test().name
- B. Test.getName+prefix
- C. prefix+name
- D. Test.prefix+Test.name
- E. Test.prefix+Test.getName()
- F. prefix+Test.name
Answer: A,E
NEW QUESTION 124
Given:
What is the result?
- A. The compilation fails at line 8.
- B. The compilation fails at line 9.
- C. The compilation fails at line 2.
- D. Hello World
Answer: D
Explanation:
NEW QUESTION 125
......
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