Sublime Data Systems Front end Web Developer Interview Questions and Answers

Html,css,javascript,reactjs,php,laravel.bootstrap

Q1. Why we use reactjs? and javascript
Ans. 
ReactJS is used for building interactive user interfaces, while JavaScript is the programming language that powers web development.
• ReactJS allows for component-based architecture, making it easier to manage and update UI elements.

• ReactJS uses a virtual DOM for efficient rendering, improving performance.

• JavaScript is the language used to add interactivity and dynamic behavior to web pages.

• JavaScript is essential for cli...read more
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Q2. This is use fro single page web aplication or real time.
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Q1. 1. What is redux? 2. What are useRefs
Ans. 
Redux is a predictable state container for JavaScript apps. useRef is a hook in React for accessing DOM nodes.
• Redux is a state management library for JavaScript applications

• It helps in managing the state of an application in a predictable way

• Redux follows a unidirectional data flow pattern

• useRef is a hook in React that allows accessing DOM nodes or any other mutable value

• It returns a mutable ref object that persists ac
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Q2. What is destructuring
Ans. 
Destructuring is a way to extract values from arrays or objects and assign them to variables.
• Destructuring can be used with arrays and objects

• It allows you to extract values and assign them to variables in a single line of code

• You can also use default values and rename variables during destructuring

• Example: const [a, b] = [1, 2]; // a = 1, b = 2

• Example: const {name, age: years} = {name: 'John', age: 30}; // name = 'Joh
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Q1. What is store in react
Ans. 
Store in React is a centralized state management system.
• Store holds the state of the application.

• It allows components to access and update the state.

• Redux is a popular store implementation for React.

• Context API is another built-in store in React.

• Store helps in managing complex state and makes debugging easier.
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Q1. What are states and props in React?
Ans. 
States and props are important concepts in React for managing and passing data between components.
• States are mutable data that can be changed within a component

• Props are read-only data passed from parent to child components

• States are managed within a component using setState() method

• Props are accessed using this.props in a component
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Q2. What is Virtual DOM
Ans. 
Virtual DOM is a lightweight copy of the actual DOM that allows for efficient updates and rendering in web applications.
• Virtual DOM is a concept used in frameworks like React to improve performance by minimizing direct manipulation of the actual DOM.

• When changes are made to the virtual DOM, a comparison is done with the actual DOM to determine the minimal updates needed for rendering.

• This process helps reduce the numbe...read more
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Q3. Build a fetch and filter component
Ans. 
A fetch and filter component for data retrieval and manipulation
• Use fetch API to retrieve data from an API endpoint

• Implement a filter function to manipulate the retrieved data based on user input

• Display the filtered data in the UI
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Javascript and React snippets

Q1. What is react and it's advantage
Ans. 
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
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Q2. React life cycle
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Q3. Questions related to Redux
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Q4. Simple app using redux
Ans. 
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
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Q1. Previous project
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Q2. Agile process followed in project
Ans. 
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
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Q1. Salary discussion
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Q2. Work location discussion
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Q1. CSS Box-model definition
Ans. 
CSS Box-model defines how elements are rendered in a webpage, including padding, border, and margin.
• Box-model consists of content, padding, border, and margin

• Content area is where text or images are displayed

• Padding is the space between content and border

• Border is the line around the content and padding

• Margin is the space outside the border
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Q2. Difference b/n flexbox and grid
Ans. 
Flexbox is for one-dimensional layouts, grid is for two-dimensional layouts.
• Flexbox is best for arranging items in a single row or column.

• Grid is best for creating complex layouts with rows and columns.

• Flexbox is more suitable for smaller scale layouts, while grid is better for larger scale layouts.

• Flexbox is more flexible in terms of item order and sizing, while grid provides more control over the overall layout.

• Both
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2 question 1 easy 2 medium dsa

2 codes of dsa and mcq.

Q1. Code paring round
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Q2. Dsa question of graph
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About AI Artificial intelligence

Q1. What is the role of u in ur project
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Q2. Why do u choose this project?
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