Mastering Arrays in Java
14 Questions
1 Views

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to Lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

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?

<p>An array that stores multiple arrays as its elements (C)</p> Signup and view all the answers

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

<p>Primitive data types are defined by how they are used, while data structures are defined by how much memory they occupy (D)</p> Signup and view all the answers

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

<p>The element can store multiple values of the same data type (D)</p> Signup and view all the answers

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

<p>int [] myIntArray = new int[5]; (C)</p> Signup and view all the answers

Which of the following best describes an array in Java?

<p>A group of similar data or objects organized in a contiguous part of memory. (C)</p> Signup and view all the answers

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

<p>0 (D)</p> Signup and view all the answers

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

<p>To assign meaningful values to the elements. (B)</p> Signup and view all the answers

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

<p>The array's address + (the element number * size / element) (C)</p> 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);

<p>The length of the array is 5 (A)</p> Signup and view all the answers

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

<p>int[] myArray = new int[] {1, 2, 3}; (D)</p> Signup and view all the answers

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

<p>Index out of bounds error (A)</p> Signup and view all the answers

More Like This

Java: Arrays of Arrays Quiz
4 questions
Java Arrays and Collections Quiz
6 questions
Programming Week 10 Flashcards
5 questions
Use Quizgecko on...
Browser
Browser