Q3 Technologies Interview Questions and Answers

OOPs (Object-Oriented Programming) is a programming paradigm based on the concept of objects, which can contain data and code.

• OOPs focuses on creating objects that interact with each other to solve complex problems

• Key principles include encapsulation, inheritance, polymorphism, and abstraction

• Encapsulation allows data hiding and protects data within objects

• Inheritance enables the creation of new classes based on e...read more

BRD defines what needs to be done, FRD details how it will be done, user stories describe specific user interactions.

• BRD (Business Requirements Document) outlines high-level business objectives and goals.

• FRD (Functional Requirements Document) details specific functionalities and features to achieve the objectives outlined in the BRD.

• User stories are short, simple descriptions of a feature told from the perspective...read more

A linked list is a linear data structure where elements are stored in nodes, each pointing to the next node.

• A linked list consists of nodes, each containing data and a reference to the next node.

• Types of linked lists include singly linked lists, doubly linked lists, and circular linked lists.

• In a singly linked list, each node points to the next node; in a doubly linked list, nodes point to both next and previous n...read more

Discussed database design and implementation in previous projects, focusing on optimization and data integrity.

• Utilized normalized database design to reduce redundancy, e.g., separating patient and appointment data.

• Implemented indexing strategies to improve query performance, such as creating indexes on frequently searched fields.

• Used transactions to ensure data integrity during critical operations, like updating ...read more

ViewBag and ViewData are used to pass data from controller to view in ASP.NET MVC.

• ViewBag is a dynamic object while ViewData is a dictionary object.

• ViewBag uses dynamic properties while ViewData uses string keys to store data.

• ViewBag is a shortcut to ViewData['key'] while ViewData requires casting to access data.

• ViewBag is not type-safe while ViewData is type-safe.

• ViewBag is used for one-way communication while Vi...read more

I have used the Observer design pattern in my current project.

• Observer pattern is used to establish a one-to-many dependency between objects.

• It allows multiple objects to be notified and updated automatically when a subject object changes its state.

• In my project, we implemented the Observer pattern to notify various components of the system about changes in data.

• For example, when a user updates their profile infor...read more