Java Programming Test 3

What will this code print?

int day = 2;
switch(day) {
    case 1: System.out.println("Mon"); break;
    case 2: System.out.println("Tue"); break;
    default: System.out.println("Other");
}

Which of the following is true about method overriding?

What will be printed?

String str = "Java Programming";
System.out.println(str.length());

What will be the output?

int[] nums = {1, 2, 3};
for(int n : nums) {
    System.out.print(n + " ");
}

Which statement is correct?

What will this code print?

import java.util.*;
class Test {
    public static void main(String[] args) {
        List<String> list = new ArrayList<>();
        list.add("A");
        list.add("B");
        list.add("A");
        System.out.println(list);
    }
}

What does the wildcard ? represent in generics?

What will happen?

public class Test {
    public static void main(String[] args) {
        Thread t = new Thread(() -> System.out.println("Thread running"));
        t.start();
    }
}

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);
        int sum = nums.stream().reduce(0, (a, b) -> a + b);
        System.out.println(sum);
    }
}

Why is synchronization used in multithreading?

How many times will this loop run?

int i = 1;
while(i < 4) {
    System.out.println(i);
    i++;
}

Which statement is correct about static methods?

What will this code print?

String str = "Interview";
System.out.println(str.substring(0, 5));

What will this code print?

int[][] arr = { {1, 2}, {3, 4} };
System.out.println(arr[1][0]);

What will be the output?

class Test {
    void m() { int x = 10/0; }
    void n() { m(); }
    void p() {
        try { n(); }
        catch(Exception e) { System.out.println("Handled"); }
    }
}
new Test().p();

What will this code print?

import java.util.*;
class Test {
    public static void main(String[] args) {
        Set<Integer> set = new HashSet<>();
        set.add(1);
        set.add(2);
        set.add(1);
        System.out.println(set);
    }
}

Which declaration is correct for a list of numbers (Integer, Double, etc.)?

What will this code print?

import java.util.*;
public class Test {
    public static void main(String[] args) {
        List<String> list = Arrays.asList("A", "B", "C");
        list.forEach(s -> System.out.print(s + " "));
    }
}

Which method collects stream results into a list?

What is a deadlock?