#Java

Describe an important multithreading concept or scenario you have encountered in your experience. (Note: Do not remember the exact question).

Design an algorithm to validate a string of parentheses. Provide your reasoning and a code example.

Write a function to find duplicate elements in a list using Java Streams. Include your thought process and a code example.

How would you find the second highest employee salary using Java Streams? Provide a code snippet to illustrate your solution.

What are the key features introduced in Java 8? Briefly describe each feature and its significance.