comp sci final

What is the proper syntax to initialize an empty 6x6 2D String array?

• String[] array = new String[6][6];

• int[][] array = new int[6][6];

• String[][] array = new String[6];

• String[][] array = new String[6][6];

int[][] grid = new int[5][3]

What is the value of grid[0].length?

• 0

• 5

• 3

• 15

A 2D array is initialized:

int [][] array = {{1,2,3},{4,5,6},{7,8,9}};

What is the result of array[0][1] + array[2][0]?

• 10

• 15

• 9

• 5

A 2D double array is declared and initialized to track the terrain of a city park. Each value in the 2D array represents the height of a particular latitude and longitude above sea level. The 2D grid represents the map of the part and each entry in the grid represents the height.

With this in mind, the columns are positioned to represent Longitude in the 2D array and Latitude is represented by each row in the 2D array.

The creator of this 2D array would like to look at the height of the city park along the longitude 100.0 - which traversal method would make the most sense in order to do so?

• Row-Major Order

• Enhanced for loop

• Column-Major Order

• This isn’t possible given the 2D array.

A 2D double array terrainMap is declared and initialized to track the terrain of a city park. Each value in the 2D array represents the height of a particular latitude and longitude above sea level. The 2D grid represents the map of the part and each entry in the grid represents the height.

With this in mind, the columns are positioned to represent Longitude in the 2D array and Latitude is represented by each row in the 2D array.

Which of the following would be a correct way to write the traversal for this 2D array?

• 
• 
• 
• 

A 2D double array terrainMap is declared and initialized to track the terrain of a city park. Each value in the 2D array represents the height of a particular latitude and longitude above sea level. The 2D grid represents the map of the part and each entry in the grid represents the height.

With this in mind, the columns are positioned to represent Longitude in the 2D array and Latitude is represented by each row in the 2D array.

Which of the following would be the correct way to print out all the indices that are more than 5 feet above sea level?

• 
• 
• 
• 

What would be a correct way to instantiate this 2D array?

• int[][] table = { 1, 0, 10, 0, 3, 8, 38, 0 };

• int[][] table = { {1, 0, 10, 0}, {3, 8, 38, 0} };

• int[][] table = { {1}, {0}, {10}, {0}, {3}, {8}, {38}, {0} };

• int[][] table = { "1, 0, 10, 0", "3, 8, 38, 0" };

• int[][] table = new int[1, 0, 10, 0][3, 8, 38, 0];

Which is the correct way to construct and assign a 2D array, with 8 rows and 10 columns, to the variable popcorn?

• int[8][10] popcorn;

• int[8][10] popcorn = new int[8][10];

• int[][] popcorn = new int[8][10];

• int[][] popcorn = new int[][](8, 10);

We want to create a 2D double array with 6 rows and 7 columns and assign it to connectFour. Which of these is correct?

• double[][] connectFour = new double[6][7];

• double[][] connectFour = new connectFour[6][7];

• double[][] connectFour = double[6][7];

• double[6][7] connectFour = new double[][];

double[][] something = { {2.5, 6.8, 8.3, 2.3, 0.0}, {6.1, 10.2, 1.3, -2.5, -9.9}, {1.1, 2.3, 5.8, 13.21, 34.55} };

• 6.8

• 6.1

• 2.3

• 1.3