Core Java Programming Course- List Iterator

The video tutorial explains the concept of list iterators in Java, demonstrating how to create and use them for iterating over lists. It covers iterating in both forward and reverse order, starting from a specific index, and performing operations like removing null values and converting odd numbers to even. The tutorial provides practical examples to illustrate these concepts.

What is a primary advantage of using a list iterator in Java?

• It allows for faster sorting of lists.

• It enables iteration in both forward and reverse directions.

• It automatically removes duplicate elements.

• It provides a graphical interface for list manipulation.

Which method would you use to check if there is a next element in a list?

• previous()

• next()

• hasNext()

• hasPrevious()

What happens when the next() method is called on a list iterator?

• It resets the list to its initial state.

• It returns the next element and moves the cursor forward.

• It shifts the cursor to the previous element.

• It removes the current element.

How can you remove null values from a list using a list iterator?

• By using the add() method.

• By using the remove() method when a null value is encountered.

• By using the contains() method.

• By using the clear() method.

What method would you use to replace null values with zero in a list?

• clear()

• add()

• remove()

• set()

In the context of list iterators, what does the set() method do?

• It updates the current element with a new value.

• It adds a new element to the list.

• It checks if the list is empty.

• It removes the current element from the list.

How can you convert odd numbers to even numbers in a list using a list iterator?

• By using the add() method to insert even numbers.

• By using the set() method after modifying the odd number.

• By using the contains() method to find even numbers.

• By using the remove() method to delete odd numbers.