Online Access Free 1z1-830 Exam Questions

Given:
java
List<String> abc = List.of("a", "b", "c");
abc.stream()
.forEach(x -> {
x = x.toUpperCase();
});
abc.stream()
.forEach(System.out::print);
What is the output?

• A.An exception is thrown.
• B.abc
• C.ABC
• D.Compilation fails.

Given:
java
public class Test {
static int count;
synchronized Test() {
count++;
}
public static void main(String[] args) throws InterruptedException {
Runnable task = Test::new;
Thread t1 = new Thread(task);
Thread t2 = new Thread(task);
t1.start();
t2.start();
t1.join();
t2.join();
System.out.println(count);
}
}
What is the given program's output?

• A.Compilation fails
• B.It's either 1 or 2
• C.It's always 2
• D.It's always 1
• E.It's either 0 or 1

Given:
java
package com.vv;
import java.time.LocalDate;
public class FetchService {
public static void main(String[] args) throws Exception {
FetchService service = new FetchService();
String ack = service.fetch();
LocalDate date = service.fetch();
System.out.println(ack + " the " + date.toString());
}
public String fetch() {
return "ok";
}
public LocalDate fetch() {
return LocalDate.now();
}
}
What will be the output?

• A.Compilation fails
• B.ok the 2024-07-10T07:17:45.523939600
• C.ok the 2024-07-10
• D.An exception is thrown

Given:
java
public class Versailles {
int mirrorsCount;
int gardensHectares;
void Versailles() { // n1
this.mirrorsCount = 17;
this.gardensHectares = 800;
System.out.println("Hall of Mirrors has " + mirrorsCount + " mirrors."); System.out.println("The gardens cover " + gardensHectares + " hectares.");
}
public static void main(String[] args) {
var castle = new Versailles(); // n2
}
}
What is printed?

• A.nginx
  Hall of Mirrors has 17 mirrors.
  The gardens cover 800 hectares.
• B.Compilation fails at line n2.
• C.An exception is thrown at runtime.
• D.Nothing
• E.Compilation fails at line n1.

Given:
java
public static void main(String[] args) {
try {
throw new IOException();
} catch (IOException e) {
throw new RuntimeException();
} finally {
throw new ArithmeticException();
}
}
What is the output?

• A.Compilation fails
• B.IOException
• C.ArithmeticException
• D.RuntimeException