Java LinkedList Quiz

What is the primary difference between ArrayList and LinkedList in Java?

• ArrayList uses a dynamic array, while LinkedList uses a doubly linked list.

• ArrayList uses a static array, while LinkedList uses a dynamic array.

• ArrayList and LinkedList are identical in implementation.

• ArrayList uses a singly linked list, while LinkedList uses a doubly linked list.

Which method adds an item to the beginning of a LinkedList?

• addFirst()

• addLast()

• addBeginning()

• addStart()

Which method is used to remove the last item from a LinkedList?

• removeTail()

• removeEnd()

• removeFinal()

• removeLast()

What is the correct way to import the LinkedList class in Java?

• import LinkedList.java.util;

• import java.util.LinkedList;

• import java.LinkedList.util;

• import util.java.LinkedList;

Which method retrieves the first item of a LinkedList without removing it?

• fetchFirst()

• getFirst()

• peekFirst()

• retrieveFirst()

When should you prefer using a LinkedList over an ArrayList?

• When you need to frequently add or remove elements from the middle of the list.

• When you need fast random access to elements.

• When memory usage is a concern.

• When you need to sort the list frequently.

Which of the following is NOT a method of the LinkedList class?

• addMiddle()

• addFirst()

• removeLast()

• getLast()

What does the LinkedList class use to store its elements?

• Containers linked to each other

• A single continuous block of memory

• A hash table

• A binary tree

Which method would you use to add an item to the end of a LinkedList?

• append()

• insertEnd()

• addEnd()

• addLast()

What is the output of the following code snippet? LinkedList cars = new LinkedList(); cars.add("Volvo"); cars.add("BMW"); cars.add("Ford"); cars.add("Mazda"); System.out.println(cars);

• [BMW, Volvo, Mazda, Ford]

• [Volvo, Ford, BMW, Mazda]

• [Volvo, BMW, Ford, Mazda]

• [Mazda, Ford, BMW, Volvo]