Java MCQ: What is the difference between ArrayList and LinkedList?
a) ArrayList uses a dynamic array, LinkedList uses a doubly linked list
b) ArrayList allows duplicates, LinkedList does not
c) ArrayList is thread-safe, LinkedList is not
d) ArrayList does not allow null elements, LinkedList does
Answer:
a) ArrayList uses a dynamic array, LinkedList uses a doubly linked list
Explanation:
An ArrayList in Java uses a dynamic array to store elements, providing fast random access but slower insertion and deletion. A LinkedList uses a doubly linked list, offering faster insertion and deletion at the cost of slower random access.
Understanding the differences between ArrayList and LinkedList is crucial for choosing the appropriate data structure based on performance needs in Java applications.
Reference links:
https://www.rameshfadatare.com/learn-java-programming/
https://www.javaguides.net/p/java-tutorial-learn-java-programming.html