Selenium WebDriver with Java - Basics to Advanced and Frameworks - Difference Between HashMap and HashTable (Interview)

The video tutorial explains the differences between hashmap and hashtable, focusing on synchronization, thread safety, handling of null keys and values, and iteration methods. Hashmap is not synchronized and allows multiple threads to access it simultaneously, while hashtable is synchronized and thread-safe. Hashmap permits null keys and values, unlike hashtable. Iteration in hashmap uses an iterator, whereas hashtable requires an enumerator. These differences are crucial for understanding their use cases in programming.

What are the main differences between a hash map and a hash table?

Explain why a hash map is considered non-synchronized.

What does it mean for a hash table to be thread-safe?

How does the handling of null keys and values differ between hash maps and hash tables?

In what scenarios would you prefer to use a hash table over a hash map?

What is the significance of using an enumerator with a hash table?

Describe how operations on hash maps and hash tables are similar despite their differences.