Ebixcash Global Services Senior Software Analyst Interview Questions, Process, and Tips

HashMap is a data structure that stores key-value pairs and uses hashing to quickly retrieve values based on keys.

• HashMap internally uses an array of linked lists to store key-value pairs.

• When a key-value pair is added, the key is hashed to determine the index in the array where it will be stored.

• If multiple keys hash to the same index, a linked list is used to handle collisions.

• To retrieve a value, the key is hashed a...read more

Java 8 introduced several new features including lambda expressions, functional interfaces, streams, and default methods.

• Lambda expressions allow you to pass functionality as a method argument.

• Functional interfaces have a single abstract method and can be used with lambda expressions.

• Streams provide a way to process collections of objects in a functional style.

• Default methods allow interfaces to have method implementat...read more

PermGen stands for Permanent Generation in Java memory management.

• PermGen is a part of the Java Heap memory space that stores metadata about the classes and methods used by the Java application.

• It is separate from the Java Heap space used for storing objects and is limited in size.

• PermGen space can be increased using JVM options like -XX:MaxPermSize.

Collections in Java are frameworks that provide an architecture to store and manipulate a group of objects.

• Collections provide interfaces (List, Set, Map) and classes (ArrayList, LinkedList, HashSet, HashMap) to store and manipulate groups of objects.

• Collections framework provides algorithms to manipulate data structures like searching, sorting, etc.

• Collections in Java are dynamic in nature, i.e., the size can be chang...read more