Data Structures: Arrays and Array Processing

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What is the correct syntax to declare and create a one-dimensional array of integers?

int[] arr = new int;

int arr = new int[15];

int[] arr; arr = new int[15]; (correct)

What can be the type of elements in an array?

Neither primitives nor objects

Only objects

Either primitives or objects (correct)

Only primitives

What is the term for the variables in an array?

Components (correct)

Variables

Items

Elements

What happens when you create a new array?

Only the array is created, not the objects that will be stored in it Signup and view all the answers

How do you create an array of Strings and store 5 Strings in it?

String[] str = new String[5]; Signup and view all the answers

What is the term for the number of components an array has?

Length Signup and view all the answers

What is the type of data stored in an array?

Same data type Signup and view all the answers

What is the syntax to refer to an array element?

arrayname[subscript] Signup and view all the answers

What happens when an array is passed as a parameter to a function?

A reference to the array is passed Signup and view all the answers

How are arrays instantiated in a program?

Using the new operator Signup and view all the answers

What is the index of the last element in an array with 15 elements?

14 Signup and view all the answers

What is the result of arr[k % j] if k is 7 and j is 5?

arr[2] Signup and view all the answers

What is the purpose of the 'length' variable in an array?

To get the number of elements in an array Signup and view all the answers

What happens when you initialize an array without assigning initial values?

It is initialized with default values Signup and view all the answers

What is the syntax to initialize an array with initial values in Java?

int[] arr = new int[] {-2,8,-1,-3,16,20,25,16,16,8,18,19,45,21,-2}; Signup and view all the answers

How do you refer to the elements of an array?

Using the array name followed by the index Signup and view all the answers

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

0 Signup and view all the answers

How do you declare an array of objects in Java?

Person[] persons; Signup and view all the answers