1Z0-819 Exam Study Guide Free Practice Test LAST UPDATED DATE Dec 23, 2023 [Q76-Q101]

1Z0-819 Exam Study Guide Free Practice Test LAST UPDATED DATE Dec 23, 2023

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Oracle 1z1-819 (Java SE 11 Developer) certification exam is intended for developers who want to validate their skills and knowledge in Java programming. 1Z0-819 exam measures the candidate's ability to develop and maintain Java applications, as well as their understanding of key concepts in the Java programming language. Candidates who pass 1Z0-819 exam can demonstrate their expertise in Java development and increase their job prospects in the industry.

Oracle 1Z0-819 certification exam is an important credential for Java developers who want to demonstrate their expertise in Java programming. Java SE 11 Developer certification can help developers stand out in a crowded job market and increase their earning potential. To prepare for the exam, candidates should take advantage of study materials and practice exams, as well as gain practical experience working with Java SE 11. With the right preparation and dedication, candidates can successfully pass the Oracle 1Z0-819 certification exam and advance their careers as Java developers.

 

NEW QUESTION # 76
Which two statements set the default locale used for formatting numbers, currency, and percentages? (Choose two.)

• A. Locale.setDefault("es", Locale.US);
• B. Locale.setDefault(Locale.SIMPLIFIED_CHINESE);
• C. Locale.setDefault(Locale.Category.FORMAT, Locale.CANADA_FRENCH);
• D. Locale.setDefault("en_CA");
• E. Locale.setDefault(Locale.Category.FORMAT, "zh-CN");

Answer: C,D

NEW QUESTION # 77
Given:

What is the type of x?

• A. List<Character>
• B. List<String>
• C. char
• D. String

Answer: D

NEW QUESTION # 78
Given:

What is the result?

• A. null
  null
• B. null
  Mary
• C. Joe
  Marry
• D. Joe
  null

Answer: D

Explanation:
Explanation
Graphical user interface, application Description automatically generated

NEW QUESTION # 79
Given:

What needs to change to make these classes compile and still handle all types of Interface Worker?

• A. Replace Line 1 with public class Main extends Thread {.
• B. Replace Line 3 with public void addProcess(T w) {.
• C. Replace Line 2 with private List processes = new ArrayList<>();.
• D. Replace Line 3 with public void addProcess (Worker w) {.

Answer: B

NEW QUESTION # 80
Given:

Which statement is true about the Fox class?

• A. Fox class does not have to override inhabit method, so long as it does not try to call it.
• B. Fox class does not have to override the inhabit method if Forest and Town provide compatible implementations.
• C. Fox class must implement either Forest or Town interfaces, but not both.
• D. Fox class must provide implementation for the inhabit method.
• E. The inhabit method implementation from the first interface that Fox implements will take precedence.

Answer: B

NEW QUESTION # 81
Which code fragment prints 100 random numbers?

• A. Option B
• B. Option A
• C. Option D
• D. Option C

Answer: C

NEW QUESTION # 82
Given:

What is the type of the local variable x?

• A. Character
• B. char
• C. String
• D. String[ ]

Answer: C

NEW QUESTION # 83
Given this requirement:
Module vehicle depends on module part and makes its com.vehicle package available for all other modules.
Which module-info.java declaration meets the requirement?

• A. Option B
• B. Option D
• C. Option A
• D. Option C

Answer: C

NEW QUESTION # 84
Given:

What is the result?

• A. 2-4
• B. The compilation fails due to an error in line 1.
• C. 0-6
  1-5
  2-4
• D. 0-6
  2-4
• E. 1-5
• F. 1-5
  2-4
• G. 0-6

Answer: E

Explanation:

NEW QUESTION # 85
Given the code fragment:

Which two statement inserted independently at line 1 enable this code to print PRRT?

• A. continue a;
• B. j--;
• C. i-;
• D. continue b;
• E. break b;
• F. break a ;

Answer: F

NEW QUESTION # 86
Given:

What is the result?

• A. 5 4 3 2 1
• B. 5 4 3 2 1 4 3 2 1 3 2 1 2 1 1
• C. 0
• D. nothing

Answer: D

Explanation:
Explanation
Graphical user interface, application Description automatically generated

NEW QUESTION # 87
What is the result?

• A. 9001: APPLICATION ERROR-9001-MyFile.txt
  9001: java.io.FileNotFoundException: MyFile.txt-MyFile.txt
• B. Compilations fails at Line 1.
• C. 9001: APPLICATION ERROR-9001-MyFile.txt
• D. 9001: java.io.FileNotFoundException: MyFile.txt-MyFile.txt

Answer: B

NEW QUESTION # 88
Given:

Which two are correct? (Choose two.)

• A. Option B
• B. Option A
• C. Option D
• D. Option C

Answer: C,D

NEW QUESTION # 89
Given:

Which statement is true?

• A. Class Tester does not need to import java.time.LocalDate because it is already visible to members of the package test.
• B. Only LocalDate class from java.time package is loaded.
• C. Tester must import java.time.LocalDate in order to compile.
• D. All classes from the package java.time. are loaded for the class Diary.

Answer: A

NEW QUESTION # 90
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. static String getFirstLetter() { return Alphabet.values()[1].toString(); }
• B. final String getFirstLetter() { return A.toString(); }
• C. String getFirstLetter() { return A.toString(); }
• D. static String getFirstLetter() { return A.toString(); }

Answer: D

NEW QUESTION # 91
Given:

Which is true?

• A. The compilation fails due to an error in line 10.
• B. The compilation succeeds.
• C. The compilation fails due to an error in line 2.
• D. The compilation fails due to an error in line 9.
• E. The compilation fails due to an error in line 6.
• F. The compilation fails due to an error in line 7.
• G. The compilation fails due to an error in line 4.

Answer: E

NEW QUESTION # 92
Analyze the code:

Which two options can you insert inside println method to produce Global:namescope? (Choose two.)

• A. prefix+Test.name
• B. prefix+name
• C. Test.getName+prefix
• D. new Test().prefix+new Test().name
• E. Test.prefix+Test.name
• F. Test.prefix+Test.getName()

Answer: D,F

NEW QUESTION # 93
Examine these module declarations:

Which two statements are correct? (Choose two.)

• A. The ServiceProvider module is the only module that, at run time, can provide the com.example.api API.
• B. The ServiceProvider module does not know the identity of a module (such as Consumer) that uses the com.example.api API.
• 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 Consumer module should require the ServiceProvider module.

Answer: A,E

NEW QUESTION # 94
Given these two classes:


And given this fragment:

Which describes the fragment?

• A. It throws IllegalMonitorStateException.
• B. It is subject to livelock.
• C. The code does not compile.
• D. It is subject to deadlock.

Answer: C

NEW QUESTION # 95
Which two statements correctly describe capabilities of interfaces and abstract classes? (Choose two.)

• A. Interfaces cannot have protected methods but abstract classes can.
• B. Both interfaces and abstract classes can have final methods.
• C. Interfaces cannot have static methods but abstract classes can.
• D. Interfaces cannot have instance fields but abstract classes can.
• E. Interfaces cannot have methods with bodies but abstract classes can.

Answer: A,D

NEW QUESTION # 96
Given:
List<String> list1 = new ArrayList<>();
list1.add("A");
list1.add("B");
List list2 = List.copyOf(list1);
list2.add("C");
List<List<String>> list3 = List.of(list1, list2);
System.out.println(list3);
What is the result?

• A. [[A, B], [A, B, C]]
• B. [[A, B, C], [A, B, C]]
• C. An exception is thrown at run time.
• D. [[A, B],[A, B]]

Answer: C

Explanation:

NEW QUESTION # 97
Given:

Which three are true? (Choose three.)

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

Answer: E,H,I

NEW QUESTION # 98
Given:

What is the result?

• A. null
  null
• B. null
  Mary
• C. Joe
  Marry
• D. Joe
  null

Answer: D

Explanation:

NEW QUESTION # 99
Given:
Automobile.java

Car.java

What must you do so that the code prints 4?

• A. Replace the code in line 2 with Car ob = new Car();
• B. Remove abstract keyword in line 1.
• C. Add @Override annotation in line 2.
• D. Remove the parameter from wheels method in line 3.

Answer: C

Explanation:

NEW QUESTION # 100
Assuming the Widget class has a getPrice method, this code does not compile:

Which two statements, independently, would allow this code to compile? (Choose two.)

• A. Replace line 5 with widgetStream.filter((Widget a) > a.getPrice() > 20.00).
• B. Replace line 5 with widgetStream.filter(a > ((Widget)a).getPrice() > 20.00).
• C. Replace line 1 with List<Widget> widgetStream = widgets.stream();.
• D. Replace line 4 with Stream<Widget> widgetStream = widgets.stream();.

Answer: B,D

NEW QUESTION # 101
......

Understanding functional and technical aspects of Java SE 11 Developer Exam Number: 1Z0-819

The following will be discussed in the ORACLE 1Z0-006 exam dumps:

• Use primitives and wrapper classes, including, operators, parentheses, type promotion and casting
• Use local variable type inference, including as lambda parameters
• Handle text using String and StringBuilder classes

 

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