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10 Questions

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Java ArrayList

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Questions and Answers

What is the crucial difference between a built-in array and an ArrayList in Java?

Adding or removing elements in an array requires creating a new array, while elements can be added or removed from an ArrayList directly. (correct)

The size of an array can be modified, while the size of an ArrayList cannot be changed.

An ArrayList can only store primitive data types, while a built-in array can store objects.

An ArrayList can have a fixed size, while an array can dynamically resize.

Which method is used to add elements to an ArrayList in Java?

addToEnd()

append()

insert()

add() (correct)

How do you access an element in an ArrayList?

get() method (correct)

retrieve() method

access() method

find()

Which method is used to change an element in an ArrayList?

set() Signup and view all the answers

What is the method to remove an item from an ArrayList?

remove() Signup and view all the answers

How do you find out the number of elements in an ArrayList?

size() method Signup and view all the answers

What type must be used to store elements like int in an ArrayList?

wrapper classes Signup and view all the answers

How would you clear all elements from an ArrayList?

clear() Signup and view all the answers

When looping through an ArrayList, which method should you use to determine the number of iterations?

size() Signup and view all the answers

What is the correct way to iterate over all elements of an ArrayList using a loop in Java?

Using a for loop with a condition based on the size of the ArrayList. Signup and view all the answers