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How much Java SE 11 Developer Exam Number: 1Z0-819 costs
- Types of questions: Performance Based Questions
- Examination Fees: $250 USD
- Examination Name: Java SE 11 Developer Exam Number: 1Z0-819
- Length of Exam: 85 min
- Passing Score: 60% or higher
- No. of Questions: 60 Questions
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NEW QUESTION 15
Examine these module declarations:
Which two statements are correct? (Choose two.)
- A. The ServiceProvider module does not know the identity of a module (such as Consumer) that uses the
- B. The Consumer module should require the ServiceProvider module.
- C. The placement of the com.example.api API in a separate module, ServiceAPI, makes it easy to install multiple provider modules.
- D. The ServiceProvider module should export the com.myimpl package.
- E. The ServiceProvider module is the only module that, at run time, can provide the com.example.api API.
Answer: B,E
Explanation:
com.example.api API.
NEW QUESTION 16
Which two are functional interfaces? (Choose two.)
- A. Option E
- B. Option D
- C. Option B
- D. Option A
- E. Option C
Answer: A,E
NEW QUESTION 17
Given:
What is the result?
- A. this is it 3
- B. is it 1
- C. this is it 2
- D. is it 0
- E. An IndexOutOfBoundsException is thrown at runtime.
Answer: C
Explanation:
NEW QUESTION 18
Given:
var data = new ArrayList<>();
data.add("Peter");
data.add(30);
data.add("Market Road");
data.set(1, 25);
data.remove(2);
data.set(3, 1000L);
System.out.print(data);
What is the output?
- A. [Peter, 25, null, 1000]
- B. [Market Road, 1000]
- C. [Peter, 30, Market Road]
- D. An exception is thrown at run time.
Answer: D
Explanation:
NEW QUESTION 19
Given:
What is the result?
- A. Map: 4 Keys: 4 Values: 4
- B. Map: 0 Keys: 0 Values: 0
- C. Map: 0 Keys: 4 Values: 4
- D. The compilation fails.
- E. Map: 4 Keys: 0 Values: 0
Answer: E
Explanation:
NEW QUESTION 20
And the code fragment:
Which situation will occur on code fragment execution?
- A. Starvation
- B. Race Condition
- C. Livelock
- D. Deadlock
Answer: A
NEW QUESTION 21
Given the code fragment:
What is the result?
- A. -1 : 2
- B. 3 : 0
- C. 2 : -1
- D. 2 : 3
Answer: C
NEW QUESTION 22
Given:
What is the result?
- A. The compilation fails at line 9.
- B. The compilation fails at line 2.
- C. The compilation fails at line 8.
- D. Hello World
Answer: D
Explanation:
NEW QUESTION 23
Given a Memberclass with fields for nameand yearsMembership, including getters and setters and a print method, and a list of clubMembersmembers:
Which two Stream methods can be changed to use method references? (Choose two.)
- A. filter(Member::getYearsMembership() >= testMembershipLength)
- B. filter(Integer::equals(0))
- C. map(testName::compareToIgnoreCase)
- D. peek(Member::print)
Answer: A,C
NEW QUESTION 24
Which two are successful examples of autoboxing? (Choose two.)
- A. Integer e = 5;
- B. Float f = 6.0;
- C. Double d = 4;
- D. Float g = Float.valueOf(null);
- E. Long c = 23L;
- F. String a = "A";
Answer: A,F
NEW QUESTION 25
Given:
When run and all three files exist, what is the state of each reader on Line 1?
- A. All three readers are still open.
- B. All three readers have been closed.
- C. Only reader1 has been closed.
- D. The compilation fails.
Answer: D
NEW QUESTION 26
A bookstore's sales are represented by a list of Sale objects populated with the name of the customer and the books they purchased.
public class Sale {
private String customer;
private List<Book> items;
// constructor, setters and getters not shown
}
public class Book {
private String name;
private double price;
// constructor, setters and getters not shown
}
Given a list of Sale objects, tList, which code fragment creates a list of total sales for each customer in ascending order?
- A. Option D
- B. Option B
- C. Option A
- D. Option C
Answer: D
NEW QUESTION 27
Given:
What is the result?
- A. 6104 3
- B. 0
- C. 10126 3
- D. 6910 3
Answer: A
Explanation:
NEW QUESTION 28
Given:
Which two method implementations are correct, when inserted independently in line 1? (Choose two.)
- A. Option E
- B. Option D
- C. Option B
- D. Option A
- E. Option C
Answer: A,D
NEW QUESTION 29
Given:
What is the result?
- A. nothing
- B. 0
- C. 1
- D. It fails to compile.
- E. A java.lang.IllegalArgumentException is thrown.
Answer: D
Explanation:
NEW QUESTION 30
Given this enum declaration:
Examine this code:
System.out.println(Alphabet.getFirstLetter());
What code should be written at line 3 to make this code print A?
- A. final String getFirstLetter() { return A.toString(); }
- B. static String getFirstLetter() { return A.toString(); }
- C. String getFirstLetter() { return A.toString(); }
- D. static String getFirstLetter() { return Alphabet.values()[1].toString(); }
Answer: B
NEW QUESTION 31
Given:
What is the result?
- A. HH
- B. The compilation fails.
- C. Y@<< hashcode>>
- D. Null
Answer: C
NEW QUESTION 32
Given:
What is the result?
- A. 6 13
- B. 0 5
- C. compilation error
- D. 5 12
Answer: C
Explanation:
NEW QUESTION 33
Given this enum declaration:
Examine this code:
System.out.println(Letter.values()[1]);
What code should be written at line 5 for this code to print 200?
- A. public String toString() { return String.valueOf(ALPHA.v); }
- B. public String toString() { return String.valueOf(Letter.values()[1]); }
- C. public String toString() { return String.valueOf(v); }
- D. String toString() { return "200"; }
Answer: C
Explanation:
NEW QUESTION 34
Given:
What is the result?
- A. AnotherClass#methodA()AnotherClass#methodA()
- B. SomeClass#methodA()AnotherClass#methodA()
- C. A ClassCastException is thrown at runtime.
- D. The compilation fails.
- E. SomeClass#methodA()SomeClass#methodA()
- F. AnotherClass#methodA()SomeClass#methodA()
Answer: D
Explanation:
NEW QUESTION 35
Given:
Which two are correct? (Choose two.)
- A. Option D
- B. Option B
- C. Option A
- D. Option C
Answer: A,D
NEW QUESTION 36
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 fails because there is no zero args constructor defined in class X.
- C. The compilation fails because a final class cannot extend another class.
- D. The compilation succeeds.
Answer: A
Explanation:
NEW QUESTION 37
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