Mastering Arrays in Java

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Which line of code will always yield an index out of bounds error?

System.out.println(arr[arr.length + 2])

System.out.println(arr[arr.length + 1])

System.out.println(arr[arr.length - 1])

System.out.printn(arr[arr.length]) (correct)

What is the correct output of the following line of code: System.out.println(arr[arr.length - 1])?

The index of the last element of the array

The length of the array

The last element of the array (correct)

The first element of the array

What is the value of arr.length in the given example?

6

4

7

5 (correct)

Which of the following best describes a two-dimensional array?

An array that stores multiple arrays as its elements Signup and view all the answers

What is the main difference between a primitive data type and a data structure?

Primitive data types are defined by how they are used, while data structures are defined by how much memory they occupy Signup and view all the answers

In the context of arrays, what does it mean for an element to be a multiple item array?

The element can store multiple values of the same data type Signup and view all the answers

Which of the following is the correct way to declare an array in Java?

int [] myIntArray = new int[5]; Signup and view all the answers

Which of the following best describes an array in Java?

A group of similar data or objects organized in a contiguous part of memory. Signup and view all the answers

What is the default value of elements in an integer array in Java?

0 Signup and view all the answers

Why is it important to initialize the elements of an array in Java?

To assign meaningful values to the elements. Signup and view all the answers

Which of the following is the correct formula to locate a particular element in an array?

The array's address + (the element number * size / element) Signup and view all the answers

What is the output of the following code snippet? int[] myOtherIntArray = {2, 4, 23, 343, 8978}; System.out.println("The length of the array is " + myOtherIntArray.length);

The length of the array is 5 Signup and view all the answers

What is the correct way to declare and initialize an array with the values 1, 2, and 3?

int[] myArray = new int[] {1, 2, 3}; Signup and view all the answers

What type of error is caused when trying to access an array element that does not exist?

Index out of bounds error Signup and view all the answers

Mastering Arrays in Java

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