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Newly Released 1Z0-819 Dumps for Oracle Java SE Certified
Oracle 1Z0-819 (Java SE 11 Developer) Certification Exam is designed to test the knowledge and skills of developers who have experience working with Java SE 11. 1Z0-819 exam covers a wide range of topics, including Java syntax and language fundamentals, object-oriented programming concepts, concurrency, I/O, and more. Passing 1Z0-819 exam demonstrates that an individual has a solid understanding of Java development principles and is capable of developing robust and efficient applications using Java SE 11.
NEW QUESTION # 110
Given the code fragment:
Which action enables Computatorclass to compile?
- A. change Line 1 to add throws NumberFormatException
- B. change Line 4 to for (Double n : collection) {
- C. change Line 5 to List<Double> numbers = List.of(5, 4, 6, 3, 7, 2, 8, 1, 9);
- D. change Line 2 to public Double sum ( C collection) {
- E. change Line 3 to Double sum = 0.0;
Answer: D
NEW QUESTION # 111
Given:
Which statement is true?
- A. All classes from the package java.time. are loaded for the class Diary.
- B. Class Tester does not need to import java.time.LocalDate because it is already visible to members of the package test.
- C. Only LocalDate class from java.time package is loaded.
- D. Tester must import java.time.LocalDate in order to compile.
Answer: B
NEW QUESTION # 112
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 A
- B. Option B
- C. Option D
- D. Option C
Answer: D
NEW QUESTION # 113
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. The program throws a NoSuchFileException.
- B. A copy of /scratch/exam/new.txt exists in the /scratch directory and /scratch/exam/new.txt is deleted.
- C. The program throws a FileaAlreadyExistsException.
- D. /scratch/exam/new.txt and /scratch/new.txt are deleted.
Answer: A
Explanation:
NEW QUESTION # 114
Assume ds is a DataSource and the EMP table is defined appropriately.
What does executing this code fragment do?
- A. inserts one row (101, 'SMITH', 'HR')
- B. inserts two rows (101, 'SMITH', 'HR') and (102, 'JONES', 'HR')
- C. throws a SQLException
- D. inserts two rows (101, 'SMITH', 'HR') and (102, 'JONES', NULL)
Answer: A
NEW QUESTION # 115
Given:
What is the result?
- A. nullnull
- B. JoeMarry
- C. nullMary
- D. Joenull
Answer: C
Explanation:
NEW QUESTION # 116
Given:
What is the output?
- A. 1 2 [1, 2, 3, 4] 3 4
- B. 1 2 [1, 2, 3, four] 3 4
- C. 1 2 [1, 2, 3, four] 3 four
- D. 1 2 [1, 2, 3, 4] 3 four
Answer: A
NEW QUESTION # 117
Analyze the code:
Which two options can you insert inside println method to produce Global:namescope? (Choose two.)
- A. prefix+Test.name
- B. Test.getName+prefix
- C. Test.prefix+Test.getName()
- D. prefix+name
- E. new Test().prefix+new Test().name
- F. Test.prefix+Test.name
Answer: C,E
NEW QUESTION # 118
Which is a proper JDBC URL?
- A. http://localhost.mysql.com:3306/database
- B. http://localhost
mysql.jdbc:3306/database - C. jdbe.mysql.com://localhost:3306/database
- D. jdbc:mysql://localhost:3306/database
Answer: D
NEW QUESTION # 119
Given:
Assume the file on path does not exist. What is the result?
- A. The compilation fails.
- B. /u01/work/filestore.txt is not deleted.
- C. /u01/work/filestore.txt is deleted.
- D. Exception
Answer: A
Explanation:
NEW QUESTION # 120
Given:
What is the result?
- A. 0
- B. It fails to compile.
- C. nothing
- D. 1
- E. A java.lang.IllegalArgumentException is thrown.
Answer: B
Explanation:
NEW QUESTION # 121
Given:
Which two are correct? (Choose two.)
- A. Option A
- B. Option D
- C. Option B
- D. Option C
Answer: B,D
NEW QUESTION # 122
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. String toString() { return "200"; }
- C. public String toString() { return String.valueOf(Letter.values()[1]); }
- D. public String toString() { return String.valueOf(v); }
Answer: D
Explanation:
NEW QUESTION # 123
Given:
Which expression when added at line 1 will produce the output of 1.17?
- A. float z = (float)(Math.round((float)x/y*100)/100);
- B. float z = Math.round((float)x/y,2);
- C. float z = Math.round((int)(x/y),2);
- D. float z = Math.round((float)x/y*100)/(float)100;
Answer: D
Explanation:
NEW QUESTION # 124
Given:
List<String> longlist = List.of("Hello","World","Beat");
List<String> shortlist = new ArrayList<>();
Which code fragment correctly forms a short list of words containing the letter "e"?
- A. Option A
- B. Option B
- C. Option D
- D. Option C
Answer: D
NEW QUESTION # 125
Given:
You want to implement the java. Io, serializable interface to the MypersisteneData class.
Which method should be overriden?
- A. The writeExternal method
- B. nothing
- C. The readExternal and writeExternal method
- D. The readExternal method
Answer: C
NEW QUESTION # 126
Given the code fragment:
What is the result?
- A. 2 : 3
- B. 3 : 0
- C. -1 : 2
- D. 2 : -1
Answer: D
NEW QUESTION # 127
Given the code fragment:
You want to display the value of currency as $100.00.
Which code inserted on line 1 will accomplish this?
- A. NumberFormat formatter = NumberFormat.getInstance(locale);
- B. NumberFormat formatter = NumberFormat.getInstance(locale).getCurrency();
- C. NumberFormat formatter = NumberFormat.getCurrencyInstance(locale);
- D. NumberFormat formatter = NumberFormat.getCurrency(locale);
Answer: B
NEW QUESTION # 128
......
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