Senior Engineer and Developer Interview Questions and Answers

Hashmap is a data structure that stores key-value pairs and provides constant time complexity for basic operations.

• Hashmap uses hashing to store and retrieve values based on their keys.

• Concurrent Hashmap is a thread-safe version of Hashmap.

• Middle node of LinkedList can be found using two pointers, one moving at twice the speed of the other.

• JVM is a virtual machine that executes Java bytecode.

• JRE is a runtime environment that provides libraries and tools for executing Java pro...read more