Understanding ArrayLists in Java

What is the purpose of using an ArrayList to store student names and grades?

• To sort the names and grades automatically

• To allow dynamic modification of data

• To limit the number of entries

• To use less memory than arrays

Why might a teacher use an ArrayList to store student grades?

• To ensure grades are stored in alphabetical order automatically

• To limit the number of student grades that can be stored

• To facilitate easy updates and additions to the grade list

• To use complex sorting algorithms automatically

How do you add an item to the end of an ArrayList?

• Using the 'set' method

• Using the 'add' method with both index and value as arguments

• Using the 'get' method

• Using the 'add' method with only the value as an argument

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

• The 'insert' method

• The 'push' method

• The 'append' method

• The 'add' method with only the value

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

• Using the 'get' method with index

• Using the 'set' method with index and value

• Using the 'add' method with value only

• Using the 'add' method with index and value as arguments

How do you find the number of items in an ArrayList?

• Using the 'count' method

• Using the 'length' method

• Using the 'capacity' method

• Using the 'size' method

What method is used to retrieve a value from an ArrayList?

• set

• add

• get

• size

What is the significance of the 'get' method in an ArrayList?

• It checks if an item exists in the list

• It retrieves the item at the specified index

• It removes an item from the list

• It adds a new item to the list

What is the correct way to loop through an ArrayList?

• Using a do-while loop with the 'get' method

• Using a for loop with the 'length' method

• Using a while loop with the 'size' method

• Using a for loop with the 'size' method

How do you modify an existing value in an ArrayList?

• Using the 'modify' method with index and new value

• Using the 'set' method with index and new value

• Using the 'change' method with index and new value

• Using the 'update' method with index and new value