1Z0-819 Exam Questions Get Updated [2023] with Correct Answers
Practice 1Z0-819 Questions With Certification guide Q&A from Training Expert PracticeDump
Oracle 1Z0-819 exam is a challenging test of a candidate's knowledge and skills in Java SE 11 development. To prepare for 1Z0-819 exam, candidates should have a solid understanding of the Java programming language and its concepts. They should also have experience working with Java development tools and frameworks, such as Eclipse, NetBeans, and Spring. Additionally, candidates should practice with sample exam questions and study materials, such as Oracle's official study guide for the exam.
NEW QUESTION # 92
Given:
Which is true about line 1?
- A. If the value is not present, a NoSuchElementException is thrown at run time.
- B. If the value is not present, nothing is done.
- C. It always executes the System.out::print statement.
- D. If the value is not present, a NullPointerException is thrown at run time.
Answer: B
Explanation:
NEW QUESTION # 93
Given:
When run and all three files exist, what is the state of each reader on Line 1?
- A. The compilation fails.
- B. All three readers have been closed.
- C. All three readers are still open.
- D. Only reader1 has been closed.
Answer: A
NEW QUESTION # 94
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. An exception is thrown at run time.
- B. [[A, B], [A, B, C]]
- C. [[A, B],[A, B]]
- D. [[A, B, C], [A, B, C]]
Answer: A
Explanation:
NEW QUESTION # 95
Given:
What is the result?
- A. An exception is thrown at runtime.
- B. 0
- C. 1
- D. 2
Answer: D
Explanation:
NEW QUESTION # 96
Given:
Which two lines inserted in line 1 will allow this code to compile? (Choose two.)
- A. public abstract void walk();
- B. protected void walk(){}
- C. private void walk(){}
- D. void walk(){}
- E. abstract void walk();
Answer: A,B
NEW QUESTION # 97
Given:
What is the result?
- A. Student
- B. nothing
- C. It fails to compile.
- D. null
- E. java.lang.IllegalAccessException is thrown.
Answer: C
NEW QUESTION # 98
Given the declaration:
Examine this code fragment:
/* Loc1 */ class ProcessOrders { ... }
Which two annotations may be applied at Loc1 in the code fragment? (Choose two.)
- A. @Resource(name="Customer1")
- B. @Resource(name="Customer1", priority=100)
- C. @Resource(priority=0)
- D. @Resource(priority=100)
- E. @Resource
Answer: C,D
NEW QUESTION # 99
Which module-info.java is correct for a service provider for a print service defined in the PrintServiceAPI module?
module PrintServiceProvider {
- A. requires PrintServiceAPI;
exports org.printservice.spi.Print with
com.provider.PrintService;
} - B. requires PrintServiceAPI;
exports org.printservice.spi;
}
module PrintServiceProvider { - C. requires PrintServiceAPI;
provides org.printservice.spi.Print with
com.provider.PrintService;
}
module PrintServiceProvider { - D. requires PrintServiceAPI;
uses com.provider.PrintService;
}
module PrintServiceProvider {
Answer: B
NEW QUESTION # 100
Given:
Which is true?
- A. The code prints 25.
- B. The code does not compile.
- C. The code throws an exception at runtime.
- D. The code compiles but does not print any result.
Answer: B
NEW QUESTION # 101
Given:
What is the result?
- A. Y@<< hashcode>>
- B. Null
- C. The compilation fails.
- D. HH
Answer: A
NEW QUESTION # 102
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 4 with Stream<Widget> widgetStream = widgets.stream();.
- B. Replace line 5 with widgetStream.filter((Widget a) > a.getPrice() > 20.00).
- C. Replace line 5 with widgetStream.filter(a > ((Widget)a).getPrice() > 20.00).
- D. Replace line 1 with List<Widget> widgetStream = widgets.stream();.
Answer: A,C
NEW QUESTION # 103
Your organization makes mlib.jar available to your cloud customers. While working on a new feature for mlib.jar, you see that the customer visible method public void enableService(String hostName, String portNumber) executes this code fragment
and you see this grant is in the security policy file:
What security vulnerability does this expose to your cloud customer's code?
- A. privilege escalation attack against the OS running the customer code
- B. XML injection attack against any mlib server
- C. denial of service attack against any reachable machine
- D. SQL injection attack against the specified host and port
- E. none because the customer code base must also be granted SocketPermission
Answer: D
NEW QUESTION # 104
Given:
What is the result?
- A. 0
- B. 1
- C. 2
- D. 3
Answer: A
Explanation:
NEW QUESTION # 105
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 string, class);
- B. Stmt.setNull(2, java,sql. Types, VARCHAR);
- C. Stmt.setNull(2, java.lang, string);
- D. Stmt.setNull(2, null);
Answer: B
NEW QUESTION # 106
Given:
executed using command:
java Hello "Hello World" Hello World
What is the output?
- A. An exception is thrown at runtime.
- B. Hello WorldHello World
- C. HelloHello WorldHelloWorld
- D. Hello WorldHelloWorld
- E. Hello World Hello World
Answer: E
NEW QUESTION # 107
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 # 108
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