Infosys Certified Java SE 21 Developer

Consider the statements with respect to the classes mentioned in the permit classes and choose the correct option?

a) Permitted subclasses must be accessible by the sealed class at compile time.
b) Permitted subclasses must directly extend the sealed class.
c) Permitted subclasses must be in the same module as the sealed class (if the sealed class is in a named module) or in the same package (if the sealed class is in the unnamed module)
d) Permitted subclasses must have exactly one of the following modifiers( final, sealed, nonsealed) to describe how it continues the sealing initiated by its superclass

In a pattern matching statement with instanceof, what is the role of a pattern variable?

Consider the following code snippet. Assume all imports are done and preview feature is enabled. Predict the output

 int x = 50;
 int y = 30;
 StringTemplate st = StringTemplate.RAW."\{x} + \{y} = \{x - y}";
 System.out.println(st.fragments()); //Line1
 System.out.println(st.values());

You have a StringTemplate with the following definition:

"Hello, $name! Your favorite color is $color and you are $age years old."
Which of the following code snippets will correctly format the template with the provided data?

Given:

void getValue(Object value) {
if (!(value instanceof Integer input))
 System.out.print("Integer!");
else if (!(value instanceof String input)) {  // Line 1
 throw new RuntimeException();
}
System.out.print("String!");
}

What is the output produced on calling getValue("integer")? (Assume the code is present inside in a valid class.)

Which of the following is not a Permanent Feature introduced in Java SE 21?

Which class in Java provides an implementation of an Enhanced PseudoRandom Number Generator (EPRNG)?

Assuming that the below code is present in a valid main() method, find the output of the code:

 Object obj = "10";
 switch (obj) {
 case Integer i -> System.out.println(i + 5);
 case String s -> System.out.println(s + "5");
 case Long l -> System.out.println(l + 5);
 default -> System.out.println("Unknown");
 }

How does inheritance work with record classes?

Choose the correct option for the below statement:

The permits clause in record classes allows: