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Preparing for the Oracle 1Z0-819 exam requires a solid understanding of Java SE 11 concepts and hands-on experience with Java programming. Oracle recommends that candidates take the Java SE 11 Developer learning path, which includes several training courses, practice exams, and hands-on labs. In addition, candidates can use online resources such as books, blogs, and forums to supplement their learning.
NEW QUESTION # 103
Examine this excerpt from the declaration of the java.se module:
What does the transitive modifier mean?
- A. Only a module that requires the java.se module is permitted to require the java.sql module.
- B. Any module that requires the java.sql module does not need to require the java.se module.
- C. Any module that attempts to require the java.se module actually requires the java.sql module instead.
- D. Any module that requires the java.se module does not need to require the java.sql module.
Answer: A
NEW QUESTION # 104
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(); Greeting myG = new Greeting(); myG.sayHi ();
- C. Hello myH = new Hello();
Hello.Greeting myG = myH.new Greeting();
myG.sayHi(); - D. Hello.Greeting myG = new Hello.Greeting() myG.sayHi();
Answer: C
NEW QUESTION # 105
Given:
What is the output?
- A. A NullPointerException is thrown at run time.
- B. null
- C. Duke
- D. A NoSuchElementException is thrown at run time.
Answer: C
Explanation:
NEW QUESTION # 106
Given:
and
Which four identifiers from the Fooand Barclasses are visible at line 1? (Choose four.)
- A. e
- B. B
- C. i
- D. c
- E. d
- F. f
- G. A
- H. h
- I. j
- J. g
Answer: B,D,G,J
NEW QUESTION # 107
Given:
Assuming that this code compiles correctly, which three statements are true? (Choose three.)
- A. B is a subtype of A.
- B. B cannot be final.
- C. B cannot be abstract.
- D. A cannot be abstract.
- E. A is a subtype of B.
- F. A cannot be final.
Answer: A,C,F
NEW QUESTION # 108
Given:
What is the result?
- A. 2,54,54,5
- B. 2,34,54,3
- C. 2,34,34,5
- D. 2,34,54,5
Answer: A
Explanation:
NEW QUESTION # 109
How many Thing objects are eligible for garbage collection in line 1?
- A. 0
- B. 1
- C. 2
- D. 3
- E. 4
Answer: A
NEW QUESTION # 110
Given:
What is the result?
- A. An exception is thrown at runtime.
- B. 0
- C. 1
- D. 2
Answer: C
Explanation:
NEW QUESTION # 111
Given:
What is the result?
- A. Keys: 4 Values: 4 Map: 0
- B. Keys: 0 Values: 0 Map: 0
- C. The compilation fails.
- D. Keys: 0 Values: 0 Map:
- E. Keys: 4 Values: 4 Map: 4
Answer: E
NEW QUESTION # 112
Given:
What is the result?
- A. Joe
Marry - B. null
null - C. Joe
null - D. null
Mary
Answer: C
Explanation:
NEW QUESTION # 113
Given:
Which two are secure serialization of these objects? (Choose two.)
- A. Implement only writeReplace to replace the instance with a serial proxy and not readResolve.
- B. Declare fields transient.
- C. Make the class abstract.
- D. Implement only readResolve to replace the instance with a serial proxy and not writeReplace.
- E. Define the serialPersistentFields array field.
Answer: D,E
NEW QUESTION # 114
Given the code fragment:
Which two code snippets inserted independently inside println method print Mondial:domainmodel? (Choose two.)
- A. new Main().prefix + new Main().name
- B. prefix + getName
- C. Main.prefix + Main.getName()
- D. Main.prefix + Main.name
- E. prefix + Main.name
- F. prefix + name
Answer: B,C
NEW QUESTION # 115
Given the content:
What Is the result?
A)
B)
C)
D)
E)
User Username
- A. Option
- B. Option A
- C. Option B
- D. Option C
- E. Option D
Answer: A,E
NEW QUESTION # 116
Given:
/code/a/Test.java
containing:
and
/code/b/Best.java
containing:
package b;
public class Best { }
Which is the valid way to generate bytecode for all classes?
- A. javac -d /code /code/a/Test.java /code/b/Best.java
- B. java /code/a/Test.java /code/b/Best.java
- C. javac -d /code /code/a/Test.java
- D. java -cp /code a.Test
- E. javac -d /code /code/a/Test
- F. java /code/a/Test.java
Answer: A
NEW QUESTION # 117
Given:
Which statement on line 1 enables this code to compile?
- A. Function<Integer, Integer> f = n > n * 2;
- B. Function<int> f = n > n * 2;
- C. Function f = n > n * 2;
- D. Function<int, int> f = n > n * 2;
- E. Function<Integer> f = n > n * 2;
Answer: A
Explanation:
NEW QUESTION # 118
Given:
Which two interfaces can be used in lambda expressions? (Choose two.)
- A. MyInterface4
- B. MyInterface1
- C. MyInterface5
- D. MyInterface2
- E. MyInterface3
Answer: C,D
NEW QUESTION # 119
......
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