NeoSOFT Interview Questions, Process, and Tips for Freshers

Developed a web application for managing inventory and sales for a retail store.

• Used Angular framework to create a responsive and user-friendly interface.

• Implemented features for adding, updating, and deleting products in the inventory.

• Integrated with backend APIs to fetch real-time sales data and generate reports.

• Utilized Angular Material for designing consistent UI components.

Angular is a popular front-end framework for building web applications. SPA stands for Single Page Application.

• Angular is a front-end framework developed by Google for building dynamic web applications.

• It uses TypeScript for building applications with components, services, and modules.

• SPA is a web application that loads a single HTML page and dynamically updates the content as the user interacts with the app.

• SPA provid...read more

Lazy loading is a technique in web development where resources are loaded only when needed, improving performance.

• Lazy loading helps reduce initial load time by loading resources on demand

• It is commonly used in Angular for loading modules, components, or routes asynchronously

• Lazy loading can improve user experience by speeding up page load times

RxJS is a library for reactive programming using Observables to handle asynchronous data streams.

• RxJS stands for Reactive Extensions for JavaScript.

• It allows you to work with asynchronous data streams and handle events.

• Operators like map, filter, and mergeMap are used to manipulate and combine streams.

• Subscriptions are used to listen to and react to changes in the data streams.

• Example: Using RxJS to make HTTP requests

?? is the nullish coalescing operator, while ? is the optional chaining operator in Angular.

• ?? is used to provide a default value when a variable is null or undefined.

• ? is used to safely access nested properties of an object without causing errors.

• Example: const name = person?.name; // safe access to 'name' property of 'person' object

Hoisting is a JavaScript mechanism where variable and function declarations are moved to the top of their containing scope during compilation.

• Variable declarations are hoisted but not their initializations.

• Function declarations are fully hoisted, meaning they can be called before they are declared.

• Hoisting can lead to unexpected behavior if not understood properly.

CSS positions include static, relative, absolute, fixed, and sticky.

• Static - default position, elements are positioned according to the normal flow of the document

• Relative - positioned relative to its normal position

• Absolute - positioned relative to the nearest positioned ancestor

• Fixed - positioned relative to the viewport

• Sticky - acts like a combination of relative and fixed positioning

Semantic tags are HTML tags that clearly define the content they contain for better accessibility and SEO.

• Semantic tags provide meaning to the content they enclose, making it easier for search engines to understand the structure of the page.

• Examples of semantic tags include

  ,

• Using semantic tags improves the accessibility of the website for users with disabilities, as screen readers can interp

Promise chaining is a technique in JavaScript where multiple asynchronous operations are chained together to execute sequentially.

• Allows for handling multiple asynchronous operations in a more readable and organized way

• Each promise in the chain returns a new promise, allowing for further chaining

• Helps avoid callback hell by nesting promises inside each other

• Example: promise1.then(result => { return promise2; }).then(re

Virtual DOM is a lightweight copy of the actual DOM that React uses to improve performance by minimizing direct manipulation of the actual DOM.

• Virtual DOM is a concept in React where a lightweight copy of the actual DOM is created and updated in memory.

• When changes are made to the virtual DOM, React compares it with the actual DOM and only updates the necessary parts, reducing the number of direct manipulations to the ...read more

Synthetic events in React are events that are normalized by React to ensure consistent behavior across different browsers.

• Synthetic events are instances of the SyntheticEvent object in React.

• They are cross-browser compatible and have the same interface as native events.

• They are used to handle events like onClick, onChange, etc. in React components.

• Example: Click me

Redux is a predictable state container for JavaScript apps.

• Redux is a state management tool commonly used with React to manage the application's state in a predictable way.

• It helps in maintaining a single source of truth for the state of the entire application.

• Redux follows a unidirectional data flow, making it easier to understand how data changes over time.

• Actions are dispatched to update the state in Redux, and redu...read more

Hooks in React are functions that let you use state and other React features without writing a class.

• Hooks were introduced in React 16.8.

• They allow you to use state and other React features in functional components.

• Some commonly used hooks are useState, useEffect, useContext, and useReducer.

useMemo is used for memoizing values, while useCallback is used for memoizing functions.

• useMemo is used to memoize a value and only recompute it when its dependencies change.

• useCallback is used to memoize a function instance and only re-create it when its dependencies change.

• Example: useMemo can be used to memoize the result of a complex computation, while useCallback can be used to memoize a callback function passed t

Dependency injection is a design pattern in which 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: Constructor injection, Setter injection, Interface injection

Middleware is software that acts as a bridge between different applications, allowing them to communicate and share data.

• Middleware facilitates communication between different software applications

• It can handle tasks such as message queuing, data transformation, and security

• Examples of middleware include message brokers like RabbitMQ, ESBs like MuleSoft, and API gateways like Kong