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High passing rate and hit rate to guarantee the client pass the exam

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3 versions for the client to choose

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Oracle Java SE 21 Developer Professional Sample Questions:

1. Given a properties file on the classpath named Person.properties with the content:
ini
name=James
And:
java
public class Person extends ListResourceBundle {
protected Object[][] getContents() {
return new Object[][]{
{"name", "Jeanne"}
};
}
}
And:
java
public class Test {
public static void main(String[] args) {
ResourceBundle bundle = ResourceBundle.getBundle("Person");
String name = bundle.getString("name");
System.out.println(name);
}
}
What is the given program's output?

A) JamesJeanne
B) James
C) Compilation fails
D) MissingResourceException
E) Jeanne
F) JeanneJames

2. Which of the following java.io.Console methods doesnotexist?

A) reader()
B) readLine(String fmt, Object... args)
C) readPassword(String fmt, Object... args)
D) readLine()
E) readPassword()
F) read()

3. Given:
java
List<Long> cannesFestivalfeatureFilms = LongStream.range(1, 1945)
.boxed()
.toList();
try (var executor = Executors.newVirtualThreadPerTaskExecutor()) {
cannesFestivalfeatureFilms.stream()
.limit(25)
.forEach(film -> executor.submit(() -> {
System.out.println(film);
}));
}
What is printed?

A) Numbers from 1 to 25 randomly
B) Numbers from 1 to 25 sequentially
C) Compilation fails
D) An exception is thrown at runtime
E) Numbers from 1 to 1945 randomly

4. Given:
java
Object input = 42;
String result = switch (input) {
case String s -> "It's a string with value: " + s;
case Double d -> "It's a double with value: " + d;
case Integer i -> "It's an integer with value: " + i;
};
System.out.println(result);
What is printed?

A) It's a string with value: 42
B) It throws an exception at runtime.
C) Compilation fails.
D) null
E) It's a double with value: 42
F) It's an integer with value: 42

5. Which two of the following aren't the correct ways to create a Stream?

A) Stream<String> stream = Stream.builder().add("a").build();
B) Stream stream = new Stream();
C) Stream stream = Stream.empty();
D) Stream stream = Stream.of();
E) Stream stream = Stream.generate(() -> "a");
F) Stream stream = Stream.ofNullable("a");

Solutions: