LINKEDLIST Q3 Flashcards
What is the output of the following code:
LinkedList cars = new LinkedList(); cars.add(“Volvo”); cars.add(“BMW”); System.out.println(cars);?
A.) [BMW, Volvo]
B.) [BMW]
C.) [Volvo]
D.) [Volvo, BMW]
D.) [Volvo, BMW]
Which of the following methods retrieves the first element of a LinkedList?
peekFirst()
first()
getFirst()
head()
getFirst()
What interface do both ArrayList and LinkedList implement?
Collection
List
Set
Map
List
- Which method would you use to check if a LinkedList is empty?
length()
size()
checkEmpty()
isEmpty()
isEmpty()
When should you prefer using an ArrayList over a LinkedList?
-When you need to maintain order of insertion
-When you need to store large amounts of data
-When you need to access elements randomly
-When you need to frequently add and remove elements
When you need to access elements randomly
Which method would you use to remove the last item from a LinkedList?
removeLast()
pop()
removeFirst()
deleteLast()
removeLast()
Which of the following is a method to retrieve the last element of a LinkedList?
getLast()
last()
end()
peekLast()
getLast()
Which method would you use to remove the last item from a LinkedList?
removeLast()
pop()
removeFirst()
deleteLast()
removeLast()
What is the primary purpose of the LinkedList class in Java?
A.) To store data in a fixed-size array
B.) To provide a collection that can contain many objects of the same type
C.) To create a multi-dimensional array
D.) To implement a stack data structure
B.) To provide a collection that can contain many objects of the same type
How does the LinkedList class store its items?
A.) In a single continuous block of memory
B.) In containers linked to each other
C.) In a hash table
D.) In a binary tree structure
B.) In containers linked to each other
What is the main advantage of using a LinkedList over an ArrayList?
A.) Faster access to random elements
B.) More efficient for adding and removing elements
C.) Less memory usage
D.) Easier to implement
B.) More efficient for adding and removing elements
Which method is NOT part of the LinkedList class?
push()
clear()
remove()
add()
push()
Which method is used to add an item to the beginning of a LinkedList?
prepend()
addFirst()
insert()
addLast()
addFirst()
Which of the following methods can be used to clear all elements from a LinkedList?
clear()
removeAll()
deleteAll()
reset()
clear()
