What is the complexity of adding an element to the heap?
What is a string array?
How many types of data structures are there?
which is the simplest file structure? (Sequential, indexed, random)
What are the different types of data structures?
Is treemap thread safe?
What is the difference between a hashmap and hashtable?
How do arrays work?
Differentiate between hashset and hashmap.
Name some applications which use linked lists.
State the difference between primitive and non-primitive data types?
Can we extend an array after initialization?
Why is data structure?