Java · question
Question 9 of 89
What is the difference between ArrayList and LinkedList?
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Re-explain
ArrayList:
- Dynamic array implementation
- Fast random access O(1)
- Slow insertion/deletion in middle O(n)
- Better for frequent access operations
LinkedList:
- Doubly-linked list implementation
- Slow random access O(n)
- Fast insertion/deletion O(1)
- Better for frequent modification operations
List<String> arrayList = new ArrayList<>();
List<String> linkedList = new LinkedList<>();
// ArrayList better for
String element = arrayList.get(100); // O(1)
// LinkedList better for
linkedList.add(0, "first"); // O(1)
linkedList.remove(0); // O(1)
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