New 2026 1Z0-819 Dumps for Oracle Java SE Certified Exam Questions and Answer
Realistic Verified 1Z0-819 exam dumps Q&As - 1Z0-819 Free Update
NEW QUESTION # 149
Given:
Which code, when inserted at one or more marked positions, would allow classes B and C to compile?
- A. implements A // position 1@Override // position 2
- B. public void z() { } // position 3
- C. @Override // position 3void x () {} // position 3@Override // position 3public void z() { } // position 3
- D. @Override // position 2public void z() { } // position 3
Answer: D
NEW QUESTION # 150
Given:
What is the result?
- A. An exception is thrown at runtime
- B. Green
- C. Mr, Green
- D. Mr, Blue
Answer: D
NEW QUESTION # 151
Given:
var fruits = List.of("apple", "orange", "banana", "lemon");
You want to examine the first element that contains the character n. Which statement will accomplish this?
- A. Optional<String> result = fruits.stream().filter(f -> f.contains ("n")).findFirst ();
- B. fruits.stream().filter(f -> f.contains("n")).forEachOrdered(System.out::print);
- C. Optional<String> result = fruits.stream().anyMatch(f -> f.contains("n"));
- D. String result = fruits.stream().filter(f -> f.contains("n")).findAny();
Answer: B
Explanation:
NEW QUESTION # 152
Given:
What is the expected result of javac?
- A. javac fails to compile the class and prints the error message, Error: Could not find or load main class Mycar.class
- B. javac compiles Mycar.java without errors or warnings.
- C. javac fails to compile the class and prints the error message, C:\workspace4\Mycar.java:1:error: package java does not exist
- D. javac fails to compile the class and prints the error message, C:\workspace4\Mycar.java:1:error: expected import java.lang
Answer: B
NEW QUESTION # 153
Given:
What is the result?
- A. p1
- B. The compilation fails due to an error in line 1.
- C. Joe Bloggs
- D. null
Answer: B
Explanation:
NEW QUESTION # 154
Which is a proper JDBC URL?
- A. jdbe.mysql.com://localhost:3306/database
- B. http://localhost.mysql.com:3306/database
- C. http://localhost
mysql.jdbc:3306/database - D. jdbc:mysql://localhost:3306/database
Answer: D
NEW QUESTION # 155
Given:
String originalPath = "data\\projects\\a-project\\..\\..\\another-project"; Path path = Paths.get(originalPath); System.out.print(path.normalize()); What is the result?
- A. data\another-project
- B. data\\projects\\a-project\\..\\..\\another-project
- C. data\projects\a-project\..\..\another-project
- D. data\projects\a-project\another-project
Answer: C
Explanation:
NEW QUESTION # 156
Which code fragment prints 100 random numbers?
- A. Option A
- B. Option B
- C. Option C
- D. Option D
Answer: D
NEW QUESTION # 157
Given the declaration:
In which two locations is it legal to apply the @Resource annotation?
- A. Loc2
- B. Loc4
- C. Loc3
- D. Loc1
- E. Loc2
Answer: C,E
NEW QUESTION # 158
Given these declarations:
and these two code fragments:
Fragment 1:
Fragment 2:
Which code fragment is preferred and why?
- A. Fragment 1 because it is shorter.
- B. Fragment 1 because it is more performant.
- C. Fragment 2 because it explicitly specifies the SQL types of the column values.
- D. Fragment 2 because it prevents SQL injection.
Answer: D
NEW QUESTION # 159
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. peek(Member::print)
- B. filter(Member::getYearsMembership() >= testMembershipLength)
- C. map(testName::compareToIgnoreCase)
- D. filter(Integer::equals(0))
Answer: B,C
NEW QUESTION # 160
Given:
What is the result?
- A. abcd
- B. abdf
- C. The compilation fails.
- D. adf
- E. abd
Answer: A
NEW QUESTION # 161
Given:
What is the result?
- A. [0,0] = Red[1,0] = Black[2,0] = Blue
- B. java.lang.ArrayIndexOutOfBoundsException thrown
- C. [0,0] = Red[0,1] = White[1,0] = Black[1,1] = Blue[2,0] = Yellow[2,1] = Green[3,0] = Violet
- D. [0,0] = Red[0,1] = White[1,0] = Black[2,0] = Blue[2,1] = Yellow[2,2] = Green[2,3] = Violet
Answer: D
Explanation:
NEW QUESTION # 162
Given:
What is required to make the Foo class thread safe?
- A. Move the declaration of lock inside the foo method.
- B. Replace the lock constructor call with new ReentrantLock (true).
- C. Make the declaration of lock static.
- D. No change is required.
Answer: B
NEW QUESTION # 163 
Why does this compilation fail?
- A. The method Y. print (object) does not call the method super.print (object)
- B. The method print (object) and the method print (object...) are duplicates of each other.
- C. The method Y. print (object...) cannot override the final method x.print (object....).
- D. In method x. print (Collection), system. Out :: prints is an invalid Java identifier.
- E. The method x. print (object) is not accessible to Y.
Answer: B
NEW QUESTION # 164
Given:
After which line can we insert assert i < 0 || values[i] <= values[i + 1]; to verify that the values array is partially sorted?
- A. after line 6
- B. after line 8
- C. after line 10
- D. after line 5
Answer: A
Explanation:
NEW QUESTION # 165
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 # 166
Given the code fragment:
You must define the A exception class. The program execution must be terminated if the condition at line 19 is true and an a exception is thrown at line 20.
Which code fragment at line n1 defines A as per the requirement?
- A. Class A extends Throwable {
- B. Class A extends ArithmeticException {
- C. Class A extends RuntimeException {
- D. Class A extends Exception {
Answer: D
NEW QUESTION # 167
Given:
What is the result?
- A. An exception is thrown at runtime.
- B. 0
- C. The compilation fails.
- D. 1
Answer: C
NEW QUESTION # 168
Given:
What is the result?
- A. 0
- B. 1
- C. 2
- D. 3
Answer: B
Explanation:
NEW QUESTION # 169
Given:
What is the result?
- A. 6104 3
- B. 0
- C. 6910 3
- D. 10126 3
Answer: A
Explanation:
NEW QUESTION # 170
......
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