DXC Technology Front end Developer Interview Questions and Answers

Micro Frontend architecture is an approach to building front-end applications by breaking them down into smaller, independently deployable units.

• Allows different teams to work on separate parts of the application

• Each micro frontend can be developed using different technologies

• Enables incremental upgrades and updates without affecting the entire application

• Can improve performance by loading only the necessary components

• ...read more

Pure pipes in Angular are stateless and do not change the input data, while impure pipes can have side effects and change the input data.

• Pure pipes are used for simple transformations like formatting dates or numbers.

• Impure pipes are used for more complex transformations that require state or side effects.

• Pure pipes are faster and more efficient as they only run when a pure change to the input data is detected.

• Impure p...read more

Singleton services can be made multiton by maintaining a map of instances with unique keys.

• Create a map to store instances with unique keys

• Use a factory method to retrieve instances based on keys

• Ensure that only one instance is created per key

Dependency injection is a design pattern where components are given their dependencies rather than creating them internally.

• Allows for easier testing by injecting mock dependencies

• Promotes loose coupling between components

• Improves code reusability and maintainability

• Examples: AngularJS, Spring Framework

React is a JavaScript library for building user interfaces.

• React allows for the creation of reusable UI components

• It uses a virtual DOM for efficient rendering

• React is declarative, making it easier to understand and debug code

Creating a simple app using Redux for state management in a front end application.

• Set up Redux store with reducers and actions

• Connect components to Redux store using mapStateToProps and mapDispatchToProps

• Dispatch actions to update state in Redux store

• Use combineReducers to manage multiple reducers

Agile process involves iterative development, frequent collaboration, and adaptability to changes.

• Daily stand-up meetings to discuss progress and roadblocks

• Sprints for focused development and testing

• Continuous feedback and iteration based on user input

• Use of tools like Jira or Trello for project management

Front end developers are in high demand due to the increasing importance of user experience in web development.

• Front end developers work on the client side of web development, focusing on the user interface and user experience.

• They are responsible for implementing designs, optimizing performance, and ensuring cross-browser compatibility.

• Front end developers often use HTML, CSS, and JavaScript, as well as frameworks lik...read more

Reasoning is the mental process of thinking, understanding, and forming conclusions.

• Reasoning involves using logic and critical thinking to make sense of information.

• It helps in problem-solving and decision-making by analyzing and evaluating evidence.

• Types of reasoning include inductive reasoning, deductive reasoning, and abductive reasoning.