Array Part-2

Which of these operators is used to allocate memory to array variable in Java?

• malloc

• alloc

• new

• new malloc

Which of the following statements assigns the letter S to the third row and first column of a two-dimensional array named strGrid (assuming row-major order).

• strGrid[0][2] = "S";

• strGrid[1][3] = "S";

• strGrid[3][1] = "S";

• strGrid[2][0] = "S";

• strGrid[0][0] = "S";

How would you get the value 6 out of the following array

int[][] a = { {2, 4, 6, 8}, {1, 2, 3, 4}};?

• a[0][3]

• a[1][3]

• a[0][2]

• a[2][0]

• a[3][1]

Given the following code segment, what is the value of sum after this code executes?

• 4

• 8

• 9

• 12

• 10

Given the following code segment, what is the value of sum after this code executes?

• {{2 3 3},{1 2 3},{1 1 2},{1 1 1}}

• {{2 1 1},{3 2 1},{3 3 2},{3 3 3}}

• {{2 1 1 1},{3 2 1 1},{3 3 2 1}}

• {{2 3 3 3},{1 2 3 3},{1 1 2 3}}

• {{1 1 1 1},{2 2 2 2},{3 3 3 3}}

Given the following code segment, what is the value of sum after this code executes?

• 4

• 6

• 9

• 10

• 20

What are the contents of arr after the following code has been executed?

• {{6, 4, 2},{2, 4, 6}}

• {{3, 2, 1},{1, 4, 6}}

• {{3, 2, 1},{1, 4, 8}}

• {{4, 4, 2},{2, 4, 4}}

• {{3, 2, 1},{2, 4, 4}}

A two-dimensional array, imagePixels, holds the brightness values for the pixels in an image. The brightness can range from 0 to 255. What does the following method compute?

• The maximum brightness value for all pixels in imagePixel

• The column with the greatest brightness sum

• The most frequent brightness value in imagePixels

• The row with the greatest brightness sum

• The sum of the total brightness of imagePixels

What will be the output of the following Java code?

int arr[] = new int [5];

System.out.print(arr);

• 0

• value stored in arr[0]

• 00000

• Class name@ hashcode

What will be the output of the following Java code?

• 0 2 4 6 8

• 1 3 5 7 9

• 0 1 2 3 4 5 6 7 8 9

• 1 2 3 4 5 6 7 8 9 10