Select the correct answerPredict the output?public class Main { public static void main(String args[]) { int arr[][] = new int[4][]; arr[0] = new int[1]; arr[1] = new int[2]; arr[2] = new int[3]; arr[3] = new int[4]; int i, j, k = 0; for (i = 0; i < 4; i++) { for (j = 0; j < i + 1; j++) { arr[i][j] = k; k++; } } for (i = 0; i < 4; i++) { for (j = 0; j < i + 1; j++) { System.out.print(" " + arr[i][j]); k++; } System.out.println(); } }} Options 0 0 0 0 0 0 0 0 0 0 0 1 2 3 4 5 6 7 8 9 Compiler Error 9 7 8 4 5 6 0 1 2 3
Question
Select the correct answerPredict the output?public class Main { public static void main(String args[]) { int arr[][] = new int[4][]; arr[0] = new int[1]; arr[1] = new int[2]; arr[2] = new int[3]; arr[3] = new int[4]; int i, j, k = 0; for (i = 0; i < 4; i++) { for (j = 0; j < i + 1; j++) { arr[i][j] = k; k++; } } for (i = 0; i < 4; i++) { for (j = 0; j < i + 1; j++) { System.out.print(" " + arr[i][j]); k++; } System.out.println(); } }} Options 0 0 0 0 0 0 0 0 0 0 0 1 2 3 4 5 6 7 8 9 Compiler Error 9 7 8 4 5 6 0 1 2 3
Solution
The correct answer is "0 1 2 3 4 5 6 7 8 9".
Here's the step by step explanation:
-
The 2D array arr[][] is declared with 4 rows, but the number of columns is not specified yet.
-
Then, each row is initialized with a different number of columns. The first row has 1 column, the second row has 2 columns, the third row has 3 columns, and the fourth row has 4 columns.
-
The variable k is initialized with 0.
-
The first nested for loop fills the array. For each row i, it fills the first i+1 columns with the values of k, incrementing k each time.
-
The second nested for loop prints the array. For each row i, it prints the first i+1 columns.
-
Therefore, the output is the sequence of numbers from 0 to 9, each number printed on a new line when the row changes.
Similar Questions
public static void main(String[] args){ for (int i = 3; i <= 7; i++) {int num;if(i%2 == 0){num = 0; for (int j = 1; j <= 4; j++) { System.out.print(num); num = (num == 0)? 3 : 2; }} else {num = 1; for (int j = 1; j <= 3; j++){System.out.print(num);num = (num == 0)? 2 : 5;} } System.out.println();}}
Select the correct answerWhat will be the output of the following Java code?class multidimention_array { public static void main(String args[]) { int arr[][] = new int[3][]; arr[0] = new int[1]; arr[1] = new int[2]; arr[2] = new int[3]; int sum = 0; for (int ct1 = 0; ct1 < 3; ++ct1) for (int ct2 = 0; ct2 < ct1 + 1; ++ct2) arr[ct1][ct2] = ct2 + 1; for (int ct1 = 0; ct1 < 3; ++ct1) for (int ct2 = 0; ct2 < ct1 + 1; ++ct2) sum += arr[ct1][ct2]; System.out.print(sum); } }Options13101114
Determine the output:public class Test{ public static void main(String[] args) { int[] x = {1, 2, 3, 4}; int[] y = x; x = new int[2]; for(int i = 0; i < x.length; i++) System.out.print(y[i] + " "); }}Select one:a.1 2b.0 0c.0 0 0 0d.1 2 3 4
Select the correct answer What will be the output of the following Java code?class evaluate { public static void main(String args[]) { int arr[] = new int[] {0 , 1, 2, 3, 4, 5, 6, 7, 8, 9}; int n = 8; n = arr[arr[n] / 4]; System.out.println(arr[n] / 4); } }Options1230
Analyze the following code:public class Test { public static void main(String[] args) { int[] x = {1, 2, 3, 4}; int[] y = x; x = new int[2]; for (int i = 0; i < y.length; i++) System.out.print(y[i] + " "); }}Group of answer choicesThe program displays 0 0 3 4The program displays 0 0The program displays 0 0 0 0The program displays 1 2
Upgrade your grade with Knowee
Get personalized homework help. Review tough concepts in more detail, or go deeper into your topic by exploring other relevant questions.