100% Free Oracle Java SE 1z1-819 Dumps PDF Demo Cert Guide Cover
PDF Exam Material 2023 Realistic 1z1-819 Dumps Questions
NEW QUESTION # 23
Which describes a characteristic of setting up the Java development environment?
- A. The Java development environment is set up for all operating systems by default.
- B. Setting up the Java development environment occurs when you install an IDE before the JDK.
- C. You set up the Java development environment for a specific operating system when you install the JDK.
- D. Setting up the Java development environment requires that you also install the JRE.
Answer: B
NEW QUESTION # 24
Given:
Which statement on line 1 enables this code to compile?
- A. Function<Integer, Integer> f = n -> n * 2;
- B. Function<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: A
Explanation:
NEW QUESTION # 25
Given:
What is the result?
A)
B)
C)
D)
- A. Option A
- B. Option C
- C. Option B
- D. Option D
Answer: A
NEW QUESTION # 26
Given:
What is the result?
- A. nullMary
- B. Joenull
- C. nullnull
- D. JoeMarry
Answer: A
Explanation:
NEW QUESTION # 27
Given:
What is the result?
- A. SomeClass#methodA()AnotherClass#methodA()
- B. The compilation fails.
- C. AnotherClass#methodA()SomeClass#methodA()
- D. A ClassCastException is thrown at runtime.
- E. SomeClass#methodA()SomeClass#methodA()
- F. AnotherClass#methodA()AnotherClass#methodA()
Answer: B
Explanation:
NEW QUESTION # 28
Given:
What is the result?
- A. 6104 3
- B. 6910 3
- C. 10126 3
- D. 0
Answer: A
Explanation:
NEW QUESTION # 29
Examine these module declarations:
Which two statements are correct? (Choose two.)
- A. The Consumer module should require the ServiceProvider module.
- B. The ServiceProvider module should export the com.myimpl package.
- C. The ServiceProvider module is the only module that, at run time, can provide the com.example.api API.
- D. The placement of the com.example.api API in a separate module, ServiceAPI, makes it easy to install multiple provider modules.
- E. The ServiceProvider module does not know the identity of a module (such as Consumer) that uses the com.example.api API.
Answer: A,C
NEW QUESTION # 30
Given:
What is the result?
- A. It fails to compile.
- B. java.lang.IllegalAccessException is thrown.
- C. nothing
- D. Student
- E. null
Answer: A
NEW QUESTION # 31
Given:
Which two lines can replace line 1 so that the Y class compiles? (Choose two.)
- A. super.set(List<String> map)
- B. set(map.values());
- C. super.set(map.values());
- D. map.forEach((k, v) -> set(v)));
- E. set(map)
Answer: B,C
NEW QUESTION # 32
Which two statements set the default locale used for formatting numbers, currency, and percentages? (Choose two.)
- A. Locale.setDefault(Locale.SIMPLIFIED_CHINESE);
- B. Locale.setDefault("en_CA");
- C. Locale.setDefault("es", Locale.US);
- D. Locale.setDefault(Locale.Category.FORMAT, "zh-CN");
- E. Locale.setDefault(Locale.Category.FORMAT, Locale.CANADA_FRENCH);
Answer: B,E
NEW QUESTION # 33
Given:
/code/a/Test.java
containing:
and
/code/b/Best.java
containing:
package b;
public class Best { }
Which is the valid way to generate bytecode for all classes?
- A. java /code/a/Test.java
- B. javac -d /code /code/a/Test
- C. javac -d /code /code/a/Test.java /code/b/Best.java
- D. java -cp /code a.Test
- E. javac -d /code /code/a/Test.java
- F. java /code/a/Test.java /code/b/Best.java
Answer: C
NEW QUESTION # 34
Given:
You want to obtain the Stream object on reading the file. Which code inserted on line 1 will accomplish this?
- A. var lines = Files.readAllLines(Paths.get(INPUT_FILE_NAME));
- B. Stream<String> lines = Files.lines(INPUT_FILE_NAME);
- C. Stream lines = Files.readAllLines(Paths.get(INPUT_FILE_NAME));
- D. var lines = Files.lines(Paths.get(INPUT_FILE_NAME));
Answer: A
NEW QUESTION # 35
Given the code fragment:
What is the result?
- A. An ArrayIndexOutOfBoundsException is thrown at runtime.
- B. abc def
- C. ab cd ef
- D. ad be cf
- E. The compilation fails.
Answer: D
NEW QUESTION # 36
Given:
This code results in a compilation error.
Which code should be inserted on line 1 for a successful compilation?
- A. Consumer consumer = msg -> { return System.out.print(msg); };
- B. Consumer consumer = var arg > {System.out.print(arg);};
- C. Consumer consumer = System.out::print;
- D. Consumer consumer = (String args) > System.out.print(args);
Answer: C
Explanation:
NEW QUESTION # 37
Given:
What is the result?
- A. Orange Juice
- B. Orange Juice Apple Pie Lemmon Ice Raspberry Tart
- C. The compilation fails.
- D. The program prints nothing.
Answer: B
Explanation:
NEW QUESTION # 38
Given:
How many LocalDate objects are created in this example?
- A. 0
- B. 1
- C. 2
- D. 3
Answer: D
NEW QUESTION # 39
Given:
Assuming that this code compiles correctly, which three statements are true? (Choose three.)
- A. B is a subtype of A.
- B. B cannot be abstract.
- C. A is a subtype of B.
- D. B cannot be final.
- E. A cannot be abstract.
- F. A cannot be final.
Answer: A,B,F
NEW QUESTION # 40
Given:
Which one is correct?
- A. Three threads are created.
- B. An IllegalThreadStateException is thrown at run time.
- C. Four threads are created.
- D. The compilation fails.
Answer: B
Explanation:
NEW QUESTION # 41
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