Intro to Java Day 13 Homework

JavaScript isn't enabled in your browser, so this file can't be opened. Enable and reload.

Email *

Record my email address with my response

Which of the following is the correct syntax for declaring an array? *

1 point

int arr[4];

int[] arr = new int[4];

int arr[4] = new int[4];

int[4] arr = new arr;

Suppose we have an array that contains the following elements: {1, 2, 3, 4, 5}

Which of the following will change the last element to 6?

1 point

arr[5] = 6;

arr[arr.length] = 6;

arr[arr.length() - 1] = 6;

arr.charAt(4) = 6;

arr[4] = 6;

Which of the following are valid ways of printing the elements in an array? *

1 point

System.out.println(arr);

Use for loop to print out all elements

Its not possible because its an object

Both A and B

Select all similarities between arrays and strings: *

1 point

They are both sequences of a primitive type

Their elements use the same functions

They are both zero-indexed

They are both primitive types

They are both non-primitive types

Required

Select all differences between arrays and strings: *

1 point

Array's elements can be modified easily by just accessing the element but it is much more difficult to modify a single character of a String

Arrays are zero-indexed but Strings are not

Arrays use square brackets to access elements but Strings use .charAt()

Arrays use .length and Strings use .length()

Arrays use .length() and Strings use .length

Arrays are more useful than Strings

Strings are a primitive type but arrays are not.

Required

Programming Question

Given the size of an array, N, and its contents, write a program that outputs how many 7s appear in the array.

Sample input

1 7 7 5

Sample output

1 point

Submit

Clear form

Never submit passwords through Google Forms.

This content is neither created nor endorsed by Google. Report Abuse - Terms of Service - Privacy Policy

Forms