Infosys Certified Java SE 17 Developer

Assuming the following declarations are top-level types declared in the same file, which successfully compile?

Record Cricket() {
final int score = 10;
}
record Book(String words) {
Book{
this.words = words + "Hello World";
}
}
sealed class Dance {}
record Hobby() {
@Override
String toString() { return null; }
}
class Divi extends Dance {}

Identify the correct way for storing timestamp values of application events in a file?

Assuming the following classes are declared as top-level types in the same file, which classes contain compiler errors? (Choose exactly two correct Options)

sealed class Employee
{
public final class Permanent extends Employee {}
}
sealed class PartTime {}
class Employee1 extends PartTime {}
non-sealed class DailyWager extends PartTime {}
sealed class Friend extends DailyWager permits PermEmpl {}
final class PermEmpl {}

A record named `Book` has fields `title` (String) and `pageCount` (int). Can you modify the `pageCount` of a `Book` object after creation?

Which of the following are valid record declarations? (Choose exactly two correct options)

I. public record Child(int age) {
private static final int age = 10; }

II. public final record Child1() {}

III. public abstract record Child2() {
private static String name; }

IV. public record Child3(boolean fun) {

@Override public boolean fun() { return false; } }

V. public record Child4(long size) {
@Override public boolean equals(Object obj) { return false; }
public void setSize(long size) {
this.size = size;
} }

Assuming a record is defined with at least one field. Which of the following methods does the compiler always insert, that can be overridden? (Choose exactly four correct options)

Predict the output of the below code ?

package com.infy;
public class Demo{
public static void main(String[] args) {
Day day=Day.TUESDAY;

switch (day) {
case Day.MONDAY -> System.out.println("Start of the week");
case Day.TUESDAY, Day.WEDNESDAY, Day.THURSDAY -> System.out.println("Weekday");
default -> System.out.println("Weekend");
}
}
}
enum Day {
MONDAY,TUESDAY,WEDNESDAY,THURSDAY
}

Given the sealed India class

sealed class India permits Delhi {}

Which Delhi class definitions, when used independently, are valid? Choose two.

(Assume India and Delhi classes are in same package )

What can you declare in the body block of a Java record? Choose two.

Given three classes that successfully compile

package com.org;
public sealed class UserLogs permits com.infy.Admin, com.manager.InfyManager {
}

package com.infy;
import com.org.UserLogs;
public final class Admin extends UserLogs {
}

package com.manager;
import com.org.UserLogs;
public final class InfyManager extends UserLogs {
}

Which of the below statement is correct?