Java 2D Array Quiz

How can you declare a 2D array in Java?

• int[][] myArray = new int[rows][columns];

• int[][] myArray = new int[rows * columns];

• int myArray[][] = {{1, 2, 3}, {4, 5, 6}};

• All of the above

What does the first index in a 2D array represent?

• The total number of elements in the array

• The number of columns in the array

• The data type of the elements in the array

• It depends on how the array is declared

What does the second index in a 2D array represent?

• The total number of elements in the array

• The number of rows in the array

• The data type of the elements in the array

• It depends on how the array is declared

How can you access an element in a 2D array?

• myArray[value]

• myArray.get(row, column)

• myArray[row][column]

• None of the above

Which loop is commonly used to traverse all elements in a 2D array?

• for loop

• while loop

• do-while loop

• Any of the above

How can you modify the value of an element in a 2D array?

• You cannot modify elements in a 2D array.

• 'myArray[row][column] = newValue;'

• By calling a specific method for the array

• None of the above

What is the purpose of the Color class in Java for working with images?

• To store and manipulate image data

• To define different color palettes

• To resize images

• To display images on the screen

How can you represent the color red using the Color class?

• 'Color red = new Color("red");'

• 'Color red = Color.RED;'

• 'Color red = Color.getColor(255, 0, 0);'

• All of the above

Which of the following methods can be used to get the red, green, and blue components of a Color object?

• 'getRed()', 'getGreen()', 'getBlue()'

• 'getColor()', 'getColor()', 'getColor()'

• 'setRed()', 'setGreen()', 'setBlue()'

• None of the above

What is the purpose of image libraries like Java Advanced Imaging (JAI) or OpenCV?

• To display images on the screen

• To provide advanced functionalities for image processing and manipulation

• To store and manage image files

• All of the above