Java Loops: Nested For & While Loops

What output will the following code produce? int height = 4; int width = 10; for (int rowCount = 0; rowCount < height; rowCount++ ) { for (int colCount = 0; colCount < width; colCount++ ) { System.out.print("@"); } System.out.println(); }

In a while loop, under what condition will the code block inside the loop execute?

Consider the Java code: int num = 1; int sum = 0; while (num <= 100) { sum += num; num++; } What is the final value of the variable sum?

What is the key difference between a while loop and a do-while loop in Java?

What is the primary purpose of the break statement in a loop?

Given a for loop that iterates through numbers 1 to 10, what would be the effect of a continue statement when the loop variable is 5?

What is the key difference between the break and continue statements in loop control?

Which of the following statements about Java arrays is correct?

What is the purpose of an array in Java?

Given the following array declaration, int[] numbers = {10, 20, 30, 40, 50};, how would you access the third element (value 30) of the array?

Which of the following code snippets correctly instantiates an array of integers with a size of 10?

If you declare an array as int[] numbers = new int[5];, what is the initial value of numbers[0]?

What is the output of the following code? int[] arr = {50, 60, 70, 80}; for (int i = 0; i <= arr.length; i++) { System.out.println(arr[i]); }

Given the following code, what will be printed to the console? String[] cars = {"Volvo", "BMW", "Ford", "Mazda"}; for (String i : cars) { System.out.println(i); }

Consider the code: int[] ages = {27, 12, 82, 70, 54, 1, 30, 34}; for (int i = 0; i < ages.length; i++ ) { System.out.println("Age is " + ages[1]); } What will be the output?

Given the array int[] ages = new int[5];, what is the result of the following code? for (int i = 0; i < ages.length; i++ ) { ages[i] = 10; }

Given the code: int[] ages = {27, 12, 82, 70, 54, 1, 30, 34}; What is the output of the following enhanced for loop? for (int age : ages ) { System.out.println("Age is " + age); }

In the break example code, what will happen when a unitScore is greater than passmark?

Referring to the continue example code, what occurs when score[i] is less than passMark?

How would you declare a two-dimensional array named sales of type double?

How do you instantiate a two-dimensional array named yearlySales with 5 rows and 4 columns?

Given int[][] sales = new int[3][4];, how would you initialize the element in the first row and second column to 1000?

Which of the following loops will print each element of the 2D array int[][] matrix = {{1, 2, 3}, {4, 5, 6}, {7, 8, 9}};?

What is the result of running this code?

int[] numbers = {1, 2, 3, 4, 5};
int sum = 0;
for (int i = 0; i < numbers.length; i++) {
    if (i % 2 == 0) {
        continue;
    }
    sum += numbers[i];
}
System.out.println(sum);

Which of the following best describes the ArrayIndexOutOfBoundsException in Java?

What is the output after executing the given code snippet?

int[] arr = {10, 5, 8, 20};
int maxVal = arr[0];
for (int num : arr) {
    if (num > maxVal) {
        maxVal = num;
    }
}
System.out.println(maxVal);

What would be the output of the following program?

public class Main {
    public static void main(String[] args) {
        int[] numbers = {1, 2, 3, 4, 5};
        for (int i = 0; i < numbers.length; i++) {
            if (numbers[i] == 3) {
                break;
            }
            System.out.println(numbers[i]);
        }
    }
}

Consider the code:

int[] numbers = {1, 2, 3, 4, 5};
int sum = 0;
for (int number : numbers) {
    if (number % 2 == 0) {
        continue;
    }
    sum += number;
}
System.out.println(sum);

What will be printed?

Analyze given code and tell what will be the output:

public class Example {
    public static void main(String[] args) {
        int[] arr = {1, 2, 3, 4, 5};
        for (int i = 0; i <= arr.length; i++) {
            try {
                System.out.print(arr[i] + " ");
            } catch (ArrayIndexOutOfBoundsException e) {
                System.out.print("Exception ");
            }
        }
    }
}

Suppose you have the following code:

int[][] array2D = {{1, 2}, {3, 4, 5}};
System.out.println(array2D[1].length);

What will be printed to the console?

What is the correct syntax to declare a String array named names with a size of 5?

What is the output of the following code snippet?

int[] numbers = new int[5];
for (int i = 0; i < numbers.length; i++) {
    numbers[i] = i * 2;
}
System.out.println(numbers[3]);

Given String[][] names = {{"Mr", "Mrs", "Ms"}, {"Smith", "Jones"}};, what is the value of names[0][1]?

What will the code System.out.println(numbers.length); print, given this array: int[] numbers = {1, 2, 3, 4, 5};?

Given the code:

int[] arr = {1, 2, 3, 4, 5};
for (int i = 0; i < arr.length; i++) {
    if (arr[i] % 2 != 0) {
        arr[i] = 0;
    }
}

What are the contents of arr after the loop?

What will the value of sum be after executing the following code?

int[] nums = {10, 20, 30, 40};
int sum = 0;
for (int i = 1; i < nums.length; i++) {
    sum += nums[i];
}

What is the output of this code?

String[] colors = {"red", "green", "blue"};
for (String color : colors) {
    System.out.println(color.toUpperCase());
}

Given the code:

int[][] matrix = new int[3][3];
int count = 1;
for(int i = 0; i < matrix.length; i++) {
    for(int j = 0; j < matrix[i].length; j++) {
        matrix[i][j] = count++;
    }
}

What is the value of matrix[1][2]?