Tata Technologies Interview Questions and Answers

I have used various design patterns such as MVC, Singleton, Factory, and Observer.

• Implemented MVC pattern in a web application to separate concerns

• Used Singleton pattern to ensure only one instance of a class is created

• Implemented Factory pattern to create objects based on input parameters

• Used Observer pattern to notify multiple objects of changes in a subject

Design patterns are reusable solutions to common software design problems.

• Design patterns provide a common language for developers to communicate about solutions to common problems.

• They can improve the quality, maintainability, and scalability of software.

• Examples of design patterns include the Singleton pattern, the Observer pattern, and the Factory pattern.

Design is important as it ensures a product is functional, user-friendly, and visually appealing.

• Good design improves user experience and satisfaction

• Design helps to identify and solve potential problems before development

• Aesthetically pleasing design can attract and retain customers

• Design can improve efficiency and reduce costs in the long run

Binary search is a search algorithm that finds the position of a target value within a sorted array.

• Binary search works by repeatedly dividing the search interval in half.

• It requires a sorted array to work efficiently.

• The time complexity of binary search is O(log n).

React is a JavaScript library for building user interfaces.

• React is component-based, meaning UI is broken down into reusable pieces

• Components can have states, which are mutable data that affect rendering

• Redux is a state management library that can be used with React

• Redux helps manage complex states and data flow in larger applications

EC2 (Elastic Compute Cloud) is a web service that provides resizable compute capacity in the cloud.

• EC2 allows users to rent virtual servers on which to run their own applications

• Users can choose from various instance types with different CPU, memory, storage, and networking capabilities

• EC2 instances can be easily scaled up or down based on demand

• Users only pay for the compute capacity they actually use

Cloud storage services like Amazon S3, Google Cloud Storage, and Microsoft Azure Blob Storage are commonly used for storing data.

• Amazon S3

• Google Cloud Storage

• Microsoft Azure Blob Storage