Addverb Technologies Application Developer Interview Questions, Process, and Tips

HashSet provides constant time performance for basic operations like add, remove, contains, while ArrayList does not.

• HashSet does not allow duplicate elements, while ArrayList allows duplicates.

• HashSet does not maintain insertion order, while ArrayList maintains insertion order.

• HashSet is faster for checking if an element exists (contains) compared to ArrayList.

Spring created via literal is created using curly braces with key-value pairs, while spring created via object is created using a constructor function.

• Spring created via literal: var spring = { color: 'blue', length: 10 };

• Spring created via object: function Spring(color, length) { this.color = color; this.length = length; }

OOPS concepts are fundamental to object-oriented programming. They include encapsulation, inheritance, polymorphism, and abstraction.

• Encapsulation: bundling data and methods that operate on that data within a single unit.

• Inheritance: creating new classes from existing ones, inheriting their properties and methods.

• Polymorphism: the ability of objects to take on multiple forms, depending on the context.

• Abstraction: hidin...read more

Inheritance is a way to create new classes based on existing ones. ArrayList is a dynamic array implementation in Java.

• Inheritance allows a subclass to inherit properties and methods from a superclass.

• ArrayList operations include adding, removing, and accessing elements.

• Example of inheritance: class Dog extends Animal

• Example of ArrayList operation: myList.add(element)

Spring annotations for data-jpa

• The @Entity annotation is used to mark a class as a persistent entity

• The @Repository annotation is used to indicate that the class provides the mechanism for storage, retrieval, search, update, and delete operation on objects

• The @Transactional annotation is used to specify the transactional behavior of a method or class

• The @Query annotation is used to specify a JPQL or native SQL query

• The...read more