CS Unit 5 Quiz Reveiw

Which of the following arrays has a length of 5?

• double[] arr = new double[6];

• double[] arr = {0, 1, 2, 3, 4, 5};

• double[] arr = new double[]{1, 2.3, 4, 5};

• All of the above

• 
  

  None of the above

Which of the following are valid arrays?

I. int[] coolArray = {1, 2, 3};

II. int[] threeThings = {1.0, 2.0, 3.0};

III. int[] = {"1", "2", "3"};

• 
  

  I only

• II only

• III only

• I and II

• I and III

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

• 
• 
• 
• 
• 

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

• 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];

• 
  

  new double[6][7] connectFour;

• 
  

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

Looking at the image, what is the value of something[1][2]?

• 6.8

• 6.1

• 2.3

• 1.3

• The array does not have an element at that location.

Looking at the image, What is the value of something[2][1]?

• 6.8

• 6.1

• 2.3

• 1.3

• 
  

  The array does not have an element at that location.

Looking at the image, what is the value of something.length?

• 5

• 4

• 3

• 12

• 8

Looking at the image, what is the value of something[2].length?

• 5

• 4

• 3

• 12

• 8

Looking at the image, how do you replace the value 13.21 with 8.8?

• 1. something[2][3] = 8.8;

  
  

• 
  

  something[2][4] = 8.8;

• 
  

  something[13.21] = 8.8;

• 
  

  something[3][4] = 8.8;

• something[3][3] = 8.8;