Intro to Java Day 16 Homework

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Which of the following correctly declares a N by M 2D integer array? *

1 point

int arr[n][m];

int[][] arr = new int[n][m];

int arr[][] = new int[n][m]

int[n][m] arr = new int[n][m]

int[][] arr = new int[][];

What is 47 (base 8) * 13 (base 8) in base 8? *

1 point

What is the output of this code if there exists an array arr that contains {5, 4, 3, 2, 1}?

for (int x : arr) {

System.out.print(x/2 + " ");

}

1 point

5 4 3 2 1

3 2 2 1 1

2.5 2 1.5 1 0.5

2 2 1 1 0

It does not print anything as there is an error in the code.

Supposed a problem gives you a N x M grid and tells you to do things with it. Which of the following correctly stores the given grid in an array? *

1 point

Programming question

Write a program that takes in 2 integers, N and M, and a N x M (rows x columns) array separated by spaces. Then print the average of each row.

Sample input:

3 5

1 1 1 1 1

Sample output:
1

1 point

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