ArrayList Methods and Operations

The video tutorial explains how to use ArrayLists in Java to store and manage student grades. It covers creating ArrayLists for names and grades, adding elements using different methods, looping through the list to retrieve data, and modifying elements using the set method. The tutorial emphasizes organizing data in alphabetical order and handling specific index insertions.

What is the purpose of creating two ArrayLists in the introduction?

• To store student names and their corresponding grades

• To store student names and their attendance

• To store student grades and their attendance

• To store student names and their ages

How are the grades initially added to the ArrayList?

• In reverse alphabetical order

• In numerical order by grades

• In alphabetical order by student names

• In random order

Which method is used to add an item to the end of an ArrayList?

• add()

• push()

• insert()

• append()

How can you add an item at a specific position in an ArrayList?

• Using the append() method

• Using the insert() method

• Using the add() method with an index

• Using the push() method

What method is used to get the number of items in an ArrayList?

• length()

• size()

• count()

• total()

Which method retrieves a value from an ArrayList?

• fetch()

• get()

• retrieve()

• find()

What is the purpose of the set() method in an ArrayList?

• To add a new item

• To clear the list

• To remove an item

• To change an existing value

How do you specify the index and new value when using the set() method?

• set(index, value)

• set(index)

• set(value)

• set(value, index)

What is the correct order of methods to add, change, and retrieve items from an ArrayList?

• add(), set(), get()

• set(), add(), get()

• get(), add(), set()

• add(), get(), set()

Which method is NOT used with ArrayLists?

• get()

• set()

• append()

• add()