Java Programming Test 5

What will be the output?

for(int i = 1; i <= 5; i++) {
    if(i == 3) break;
    System.out.print(i + " ");
}

Which is the correct main method declaration in Java?

What does the intern() method of String do?

Which method is used for copying array elements efficiently?

Which is the top-most superclass of all exceptions in Java?

Which collections use fail-fast iterators?

How does Java implement generics internally?

What will this code print?

import java.util.*;
public class Test {
    public static void main(String[] args) {
        List<Integer> nums = Arrays.asList(1, 2, 3, 4);
        nums.stream().filter(n -> n % 2 == 0).forEach(System.out::print);
    }
}

What will this code print?

import java.util.*;
public class Test {
    public static void main(String[] args) {
        List<Integer> nums = Arrays.asList(5, 1, 2, 2, 3);
        nums.stream().distinct().sorted().forEach(System.out::print);
    }
}

What does the volatile keyword ensure in Java?

What will be printed?

for(int i = 1; i <= 4; i++) {
    if(i == 2) continue;
    System.out.print(i + " ");
}

What will be the output?

void change(int x) {
    x = 50;
}
int a = 10;
change(a);
System.out.println(a);

Which is true about isEmpty() vs isBlank()?

What will this code print?

int[] arr = {1, 2, 3};
System.out.println(arr);

What will happen?

try {
    System.out.println("Hello");
} catch(Exception e) {
    System.out.println("Catch");
} finally {
    System.out.println("Finally");
}

Which method of `Queue` retrieves and removes the head of the queue, or returns `null` if empty?

Which of the following correctly declares a generic class with two type parameters?

Which lambda correctly sorts a list of strings by length?

What will this code return?

import java.util.*;
public class Test {
    public static void main(String[] args) {
        List<String> list = Arrays.asList("apple", "banana", "cherry");
        boolean result = list.stream().anyMatch(s -> s.contains("a"));
        System.out.println(result);
    }
}

Which advantage does ReentrantLock have over synchronized?