20+ Web Designer & Frontend Developer Interview Questions and Answers

Tags are elements used in HTML to define the structure and content of a web page. CSS stands for Cascading Style Sheets. Frontend Developer focuses on the user-facing aspects of a website. CSS properties are used to style and layout web pages.

• Tags in HTML are used to define different elements such as headings, paragraphs, images, links, etc.

• CSS stands for Cascading Style Sheets and is used to style the layout of web pages.

• Frontend Developers focus on the user-facing aspects o...read more

Data can be sent from child to parent component in React by using callback functions.

• Use callback functions to pass data from child to parent component

• Define a function in the parent component and pass it as a prop to the child component

• Call the function in the child component with the data as an argument

Hooks are a feature in React that allow you to use state and other React features in functional components.

• Hooks were introduced in React 16.8.

• useState() is a hook that allows functional components to have state.

• useEffect() is a hook that allows functional components to perform side effects.

• Other commonly used hooks include useContext(), useRef(), and useMemo().

There are multiple ways to create a web page, using HTML tags to structure content and CSS attributes to style it.

• Types of web pages can include static, dynamic, responsive, and single-page applications.

• HTML tags are used to define the structure and content of a web page, such as <div>, <p>, <h1>, <img>, etc.

• CSS attributes are used to style the elements on a web page, such as color, font size, margin, padding, etc.

Call, apply and bind are methods used to set the value of 'this' in a function.

• Call and apply are used to invoke a function with a specific 'this' value and arguments passed as an array or list respectively.

• Bind is used to create a new function with a specific 'this' value and arguments that can be called later.

• Call and apply are similar, but apply is useful when the number of arguments is unknown or variable.

• Bind is useful when you want to pass a function as a callback with ...read more

Prototype in JavaScript is an object that is associated with every function and object by default.

• Prototype allows objects to inherit properties and methods from other objects.

• It is used for adding new properties or methods to all instances of an object.

• Example: Adding a new method to the Array prototype to capitalize all elements: Array.prototype.capitalize = function() { return this.map(item => item.toUpperCase()); }

Meta tag is a snippet of HTML code that describes the content of a web page.

• Meta tags provide information about the webpage to search engines and browsers.

• They are placed in the head section of the HTML document.

• Common meta tags include meta description, meta keywords, and meta viewport.

• Example:

Map, reduce, and filter are higher-order functions in JavaScript used to manipulate arrays.

• Map method applies a function to each element in an array and returns a new array with the results.

• Reduce method applies a function to each element in an array, resulting in a single output value.

• Filter method creates a new array with all elements that pass a test implemented by the provided function.

HTML is a markup language used for creating web pages. Angular is a JavaScript framework for building dynamic web applications.

• HTML stands for HyperText Markup Language

• HTML is used to create the structure of a web page

• Angular is a JavaScript framework developed by Google

• Angular allows for the creation of dynamic web applications

• Angular uses components and directives to build interactive user interfaces

JavaScript is used for adding interactivity, dynamic content, and functionality to websites.

• Allows for dynamic content updates without reloading the page

• Enables interactive elements like forms, sliders, and animations

• Can be used for client-side validation and user input handling

Closure is the combination of a function bundled together with references to its surrounding state.

• Closure allows a function to access variables from its outer scope even after the outer function has finished executing.

• It helps in maintaining state in functional programming.

• Example: function outerFunction() { let outerVar = 'I am outer'; return function innerFunction() { console.log(outerVar); }; }

Backend is the server-side of a website or application, while frontend is the client-side.

• Backend handles the server, database, and application logic.

• Frontend deals with the user interface and user experience.

• Examples of backend technologies include Node.js, Python, and Ruby on Rails.

• Examples of frontend technologies include HTML, CSS, and JavaScript.

Semantic HTML is using HTML elements that have meaning and convey the structure of the content.

• Semantic HTML helps improve accessibility for users with disabilities.

• It also helps with SEO by providing search engines with better understanding of the content.

• Examples include using <header>, <nav>, <main>, <article>, <section>, <footer> tags instead of <div> for layout.

Flex in CSS is a layout model that allows elements to adjust their sizes and positions dynamically.

• Flexbox is used to create flexible layouts with a container and its child elements.

• Properties like display: flex, flex-direction, justify-content, align-items, and flex-grow are commonly used in flexbox.

• Flexbox is great for creating responsive designs and aligning items in a row or column.

Deployment of Angular application involves building the application and hosting it on a server.

• Build the Angular application using 'ng build' command

• Copy the generated files from the 'dist' folder to the server

• Configure the server to serve the Angular application

• Use tools like Jenkins or GitLab CI/CD for automated deployment

Closures and currying are advanced concepts in JavaScript that allow for more efficient and flexible code.

• Closures allow inner functions to access variables from outer functions

• Currying involves breaking down a function with multiple arguments into a series of functions with single arguments

• Both closures and currying can improve code readability and maintainability

Flex is a shorthand property in CSS for setting flexible lengths on items in a flex container.

• Flex is used in CSS to create flexible layouts.

• It allows items to grow or shrink to fill the available space.

• Flex properties include flex-grow, flex-shrink, and flex-basis.

• Example: 'display: flex;' sets a container as a flex container.

Objects in JavaScript are data structures that store key-value pairs.

• Objects are created using curly braces {}

• Keys are strings, values can be any data type

• Access values using dot notation or bracket notation

• Objects can contain functions as values

OOP stands for Object-Oriented Programming. It is a programming paradigm based on the concept of objects, which can contain data and code.

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

• Features of OOP include encapsulation, inheritance, and polymorphism

• Encapsulation allows objects to hide their internal state and require interaction through methods

• Inheritance allows objects to inherit properties and behavior from parent objects

• Polymorphism allo...read more

HTML and CSS are the building blocks of web development. HTML is used for structuring content, while CSS is used for styling and layout.

• HTML stands for HyperText Markup Language and is used to create the structure of a webpage.

• CSS stands for Cascading Style Sheets and is used to style the HTML elements on a webpage.

• HTML uses tags to define different elements like headings, paragraphs, images, links, etc.

• CSS allows for customization of colors, fonts, spacing, layout, and more ...read more

Create a reusable component for a counter in web design and frontend development.

• Use HTML for structure

• Use CSS for styling

• Use JavaScript for functionality

• Implement increment and decrement buttons

• Display the current count

I have experience working with various tech stacks including HTML, CSS, JavaScript, React, and Node.js.

• HTML

• CSS

• JavaScript

• React

• Node.js

Jenkins is a popular automation tool used for continuous integration and deployment.

• Jenkins helps automate the deployment process by allowing developers to define pipelines for building, testing, and deploying code.

• It integrates with version control systems like Git to trigger builds automatically when new code is pushed.

• Jenkins can be configured to deploy code to various environments such as development, staging, and production.

• It provides visibility into the deployment proc...read more

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

• Hooks were introduced in React 16.8 to allow developers to use state and other React features in functional components.

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

• Hooks allow for better code organization and reusability compared to class components.

• Hooks can be used to manage component state, perform side effects, and access context in fu...read more

Components in React are reusable, independent pieces of code that can be composed together to build complex user interfaces.

• Components can be functional or class-based

• Components can have their own state and lifecycle methods

• Components can be nested within other components

• Components can receive data via props

Object-oriented programming paradigm that focuses on objects and classes

• Encapsulation: bundling data and methods that operate on the data into a single unit

• Inheritance: ability of a class to inherit properties and behavior from another class

• Polymorphism: ability to present the same interface for different data types

Swapping of 2 numbers involves exchanging the values of two variables.

• Create a temporary variable to store one of the numbers

• Assign the value of the first number to the second number

• Assign the value of the temporary variable to the first number