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Oracle 1z1-819: Java SE 11 Developer is an exam that validates the skills and knowledge of Java developers. 1Z0-819 exam is designed to test the candidate's competency in Java programming language and its application in real-world scenarios. 1Z0-819 exam is based on Java SE 11, which is the latest version of Java.

 

NEW QUESTION # 29
Given:

Which three are correct? (Choose three.)

• A. f2.foo(li) prints Bonjour le monde!
• B. f1.foo(li) prints Hola Mundo!
• C. b1.foo(li) prints Hola Mundo!
• D. f1.foo(li) prints Bonjour le monde!
• E. b1.foo(li) prints Bonjour le monde!
• F. f2.foo(li) prints Hola Mundo!
• G. f2.foo(li) prints Hello world!
• H. f1.foo(li) prints Hello world!
• I. b1.foo(li) prints Hello world!

Answer: C,D,I

NEW QUESTION # 30
Given:

Which is true?

• A. The code prints 25.
• B. The code throws an exception at runtime.
• C. The code does not compile.
• D. The code compiles but does not print any result.

Answer: C

NEW QUESTION # 31
Given:

You want to obtain the Filechannel object on line 1.
Which code fragment will accomplish this?

• A.
• B.
• C.
• D.

Answer: A

NEW QUESTION # 32
Given:

Which two are secure serialization of these objects? (Choose two.)

• A. Define the serialPersistentFields array field.
• B. Make the class abstract.
• C. Declare fields transient.
• D. Implement only writeReplace to replace the instance with a serial proxy and not readResolve.
• E. Implement only readResolve to replace the instance with a serial proxy and not writeReplace.

Answer: A,E

NEW QUESTION # 33
Given the Person class with age and name along with getter and setter methods, and this code fragment:

What will be the result?

• A. Tom Aman Peter
• B. Tom Peter Aman
• C. Aman Tom Peter
• D. Aman Peter Tom

Answer: D

NEW QUESTION # 34
Given:

Which two lines can replace line 1 so that the Y class compiles? (Choose two.)

• A. set(map)
• B. super.set(map.values());
• C. super.set(List<String> map)
• D. set(map.values());
• E. map.forEach((k, v) -> set(v)));

Answer: B,D

NEW QUESTION # 35
Given:

Which three are correct? (Choose three.)

• A. f2.foo(li) prints Bonjour le monde!
• B. f1.foo(li) prints Hola Mundo!
• C. b1.foo(li) prints Hola Mundo!
• D. f1.foo(li) prints Bonjour le monde!
• E. b1.foo(li) prints Bonjour le monde!
• F. f2.foo(li) prints Hola Mundo!
• G. f2.foo(li) prints Hello world!
• H. f1.foo(li) prints Hello world!
• I. b1.foo(li) prints Hello world!

Answer: C,D,I

NEW QUESTION # 36
Which two modules include APIs in the Java SE Specification? (Choose two.)

• A. java.logging
• B. jdk.jartool
• C. jdk.httpserver
• D. java.desktop
• E. javafx

Answer: A,C

NEW QUESTION # 37
Given the code fragment:

What is the result?
EUR -> 0.84

• A. The compilation fails.
  CNY -> 6.42
• B. EUR -> 0.84
  GBP -> 0.75
  USD -> 1.00
  USD -> 1.00
• C. GBP -> 0.75
  USD -> 1.00
  CNY -> 6.42
• D. GBP -> 0.75
  EUR -> 0.84
  CNY -> 6.42

Answer: A

Explanation:

NEW QUESTION # 38
Given:

Which statement on line 1 enables this code fragment to compile?

• A. UnaryOperator function = s > s.toUpperCase();
• B. UnaryOperator<String> function = String::toUpperCase;
• C. Function<String> function = m > m.toUpperCase();
• D. Function function = String::toUpperCase;

Answer: B

Explanation:

NEW QUESTION # 39
Give:

And the code fragment:

Which three code fragments, at line n1 prints SPRING?

• A. System.out.printin(Season.SPRING);
• B. System.out.printin (sA(1)};
• C. System.out.printin (sa(0)}:
• D. System.out.printin(Season.valueOf(''SPRING"). Ordinal() );
• E. System.out.printin (Season.valueof ('s') );
• F. System.out.printin(Season,values(1)};
• G. System.out.printin (Season.valueof(''SPRING").ordinal() );

Answer: A,B,G

NEW QUESTION # 40
Given the code fragment:

What should be inserted at line n1 so that the code fragment prints Name is required?

• A. name, isBlanl ()
• B. name. compareTo('' '') == 0
• C. name.trim() == '' ''
• D. name.isEmpty

Answer: A

NEW QUESTION # 41
Given:

Which three classes successfully override showFirst ()?

• A.
• B.
• C.
• D.
• E.
• F.

Answer: C

NEW QUESTION # 42
Which two describe reasons to modularize the JDK? (Choose two.)

• A. easier to expose implementation details
• B. improves application robustness
• C. easier to understand the Java language
• D. easier to build a custom runtime linking application modules and JDK modules
• E. improves security and maintainability

Answer: B,E

NEW QUESTION # 43
Which three initialization statements are correct? (Choose three.)

• A. short sh = (short)'A';
• B. int[][] e = {{1,1},{2,2}};
• C. byte b = 10;char c = b;
• D. boolean true = (4 == 4);
• E. String contact# = "(+2) (999) (232)";
• F. int x = 12_34;
• G. float x = 1.99;

Answer: A,B,F

NEW QUESTION # 44
Which two statements are true about a class that is marked @Deprecated?

• A. Using the class Is guaranteed to cause errors at runtime.
• B. There Is always another class that can be used Instead of the deprecated class.
• C. Using the class will cause the Java compiler to give a warning.
• D. The class cannot be extended.
• E. The author of the class wants to discourage people from using the class in any way.

Answer: C,E

NEW QUESTION # 45
Given the code fragment:

What is the result?

• A. 0 4 9
• B. 0 8 10
• C. 0 8
• D. The code prints nothing.
• E. 0

Answer: C

Explanation:
Explanation
A picture containing graphical user interface Description automatically generated

NEW QUESTION # 46
Given:

What prevents this code from compiling?

• A. The calculateSurfaceAreamethod within Rectangle and Ellipserequires a publicaccess modifier.
• B. The calculateSurfaceAreamethod within Cylinder must be declared default.
• C. Cylinderis not properly calling the Rectangle and Ellipseinterfaces' calculateSurfaceArea methods.
• D. Cylinderrequires an implementation of calculateSurfaceAreawith two parameters.

Answer: C

NEW QUESTION # 47
......

The Oracle 1Z0-819 exam is divided into five main topics, including Java Fundamentals, Java Object-Oriented Programming, Java Interfaces and Inheritance, Java Exceptions, and Java I/O Fundamentals. Each of these topics is essential for a Java developer to master, and the exam tests the applicant's understanding of these concepts through a range of questions that include multiple-choice, drag-and-drop, and performance-based questions. The Oracle 1Z0-819 exam is a valuable certification for any Java developer looking to advance their career and demonstrate their expertise in Java programming.

 

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