Serial and parallel streams Array list vs link list Internal working of hashmap Executor framework How to implement Swagger Spring Actuators

Question

Accepted Answer

Understanding of Java concepts like streams, data structures, concurrency, and Spring framework components.

Serial streams process elements sequentially, while parallel streams divide the data into multiple parts and process them concurrently.
ArrayList is implemented as a resizable array, while LinkedList is implemented as a doubly linked list.
HashMap uses hashing to store key-value pairs and provides constant-time performance for basic operations.
Executor framework in Java provides a way to manage and execute asynchronous tasks.
Swagger can be implemented in Java projects to document and test APIs.
Spring Actuators provide production-ready features to monitor and manage Spring applications.

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