Updated Feb-2025 Pass 1Z0-819 Exam - Real Practice Test Questions
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Oracle 1Z0-819 exam is an excellent way for Java developers to validate their skills and knowledge and enhance their career prospects. By passing 1Z0-819 exam, developers can demonstrate their proficiency in Java SE 11 and gain recognition as an Oracle Certified Professional (OCP) Java SE 11 Developer.
NEW QUESTION # 15
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 fails to compile the class and prints the error message, C:\workspace4\Mycar.java:1:error: package java does not exist
- C. javac fails to compile the class and prints the error message, C:\workspace4\Mycar.java:1:error:
expected import java.lang - D. javac compiles Mycar.java without errors or warnings.
Answer: D
NEW QUESTION # 16
Given:
What is the result?
- A. 0
- B. 1
- C. 2
- D. 3
Answer: B
NEW QUESTION # 17
Given:
Which statement on line 1 enables this code to compile?
- A. Function<Integer> f = n -> n * 2;
- B. Function<Integer, Integer> f = n -> n * 2;
- C. Function<int> f = n -> n * 2;
- D. Function f = n -> n * 2;
- E. Function<int, int> f = n -> n * 2;
Answer: B
Explanation:
NEW QUESTION # 18
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, change the access modifier to protectedprotected class Main {
- C. In Line 1, change the access modifier to publicpublic Person() {
- D. In Line 1, remove the access modifierPerson() {
- E. 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();
Answer: C,E
NEW QUESTION # 19
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. prefix+Test.name
- C. prefix+name
- D. Test.getName+prefix
- E. Test.prefix+Test.name
- F. Test.prefix+Test.getName()
Answer: A,F
NEW QUESTION # 20
Given:
What is the result?
- A. On line 9, an exception is thrown at run time.
- B. [A, B, C]
[A, B, C] - C. [A, B, C]
followed by an exception thrown on line 11. - D. [A, B, C]
[A, B]
Answer: B
Explanation:
NEW QUESTION # 21
Given:
What is the result?
- A. TuesdayUnknown
- B. Working
- C. Tuesday
- D. Unknown
- E. The compilation fails.
- F. WorkingUnknown
Answer: D
Explanation:
NEW QUESTION # 22
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 5
- D. after line 10
Answer: A
Explanation:
NEW QUESTION # 23
Given:
What is the result?
- A. 6104 3
- B. 10126 3
- C. 0
- D. 6910 3
Answer: A
Explanation:
NEW QUESTION # 24
Given:
What is the result?
- A. nothing
- B. 0
- C. 0 4 9
- D. 1
Answer: A
NEW QUESTION # 25
Given the Customer table structure:
* ID Number Primary Key
* NAME Text Nullable
Given code fragment:
Which statement inserted on line 14 sets NAME column to a NULL value?
- A. Stmt.setNull(2, java.lang, string);
- B. Stmt.setNull(2, null);
- C. Stmt.setNull(2 string, class);
- D. Stmt.setNull(2, java,sql. Types, VARCHAR);
Answer: D
NEW QUESTION # 26
Given:
What is the result?
- A. Good Morning, Harry
- B. Good Night, Potter
- C. Good Night, Harry
- D. Good Morning, Potter
Answer: B
Explanation:
NEW QUESTION # 27
Which method throws an exception for not-a-number and infinite input values?
- A.
- B.
- C.
- D.
Answer: B
NEW QUESTION # 28
Which describes an aspect of Java that contributes to high performance?
- A. Java automatically parallelizes code execution.
- B. Java has a library of built-in functions that can be used to enable pipeline burst execution.
- C. Java prioritizes garbage collection.
- D. Java monitors and optimizes code that is frequently executed.
Answer: D
NEW QUESTION # 29
Given:
Which statement on line 1 enables this code fragment to compile?
- A. UnaryOperator<String> function = String::toUpperCase;
- B. Function<String> function = m > m.toUpperCase();
- C. UnaryOperator function = s > s.toUpperCase();
- D. Function function = String::toUpperCase;
Answer: A
Explanation:
NEW QUESTION # 30
Given:
Which two lines of code when inserted in line 1 correctly modifies instance variables? (Choose two.)
- A. tCount = tCount;
- B. aCount = a;
- C. setCCount(c) = cCount;
- D. setGCount(g);
- E. cCount = setCCount(c);
Answer: A,B
NEW QUESTION # 31
Which code fragment compiles?
- A. Option B
- B. Option D
- C. Option A
- D. Option C
Answer: B
Explanation:
NEW QUESTION # 32
Given:
and:
Which code, when inserted on line 10, prints the number of unique localities from the roster list?
- A. .map(Employee::getLocality)
.distinct()
.count(); - B. map(e -> e.getLocality())
.count(); - C. .filter(Employee::getLocality)
.distinct()
.count(); - D. .map(e -> e.getLocality())
.collect(Collectors.toSet())
.count();
Answer: C
NEW QUESTION # 33
Given:
What is the result?
- A. 5 5 3 3
- B. 3 3 3 3
- C. 3 5 3 5
- D. 3 5 3 3
Answer: D
Explanation:
NEW QUESTION # 34
Which line of code results in a compilation error?
- A. line n4
- B. line n1
- C. line n2
- D. line n3
Answer: A
NEW QUESTION # 35
Given:
What is the result?
- A. It fails to compile.
- B. nothing
- C. 0
- D. A java.lang.IllegalArgumentException is thrown.
- E. 1
Answer: A
Explanation:
NEW QUESTION # 36
Given:
Which two statements are valid to be written in this interface? (Choose two.)
- A. final void methodG(){System.out.println("G");}
- B. private abstract void methodC();
- C. public abstract void methodB();
- D. final void methodE();
- E. public int x;
- F. public String methodD();
- G. public void methodF(){System.out.println("F");}
Answer: C,F
NEW QUESTION # 37
......
Oracle 1Z0-819 exam is a certification exam for Java developers who are looking to showcase their skills and knowledge in Java SE 11. 1Z0-819 exam is designed for professionals who are interested in upgrading their Java SE 8 certification to Java SE 11 or for those who are new to Java programming and want to become certified in this technology. By passing 1Z0-819 exam, candidates can demonstrate their proficiency in Java SE 11 and prove their expertise in developing Java applications.
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