8 Front-end Developer Interview Questions + How to Answer Them

Event delegation is a key concept in JavaScript, and interviewers ask this question to assess your understanding of how it works and its benefits. This concept is essential for optimizing performance and ensuring efficient handling of user interactions, especially in complex web applications. Demonstrating your knowledge of event delegation will show that you are well-versed in best practices and capable of writing maintainable, high-performing code. Interviewers ask this question to gauge your technical expertise, problem-solving skills, and attention to detail when it comes to addressing browser-specific quirks and challenges. They want to know that you’re proactive in identifying potential compatibility issues and adept at implementing solutions to maintain a consistent look and feel across various platforms. With HTML, I am well-versed in structuring content using semantic elements, ensuring accessibility compliance, and optimizing SEO performance.

That is, as the name suggests, a design approach in which the focus is entirely on the users and their needs. Semantic HTML is a type of coding that uses HTML markup to reinforce the semantics or meaning of the information in web pages and web applications rather than merely to define its presentation or look. Semantic HTML is processed by traditional web browsers and many other user agents. The employer wants to know that you’re familiar with the coding standards that apply in implementation processes. As front-end developers commonly work on code created by other developers, it’s important that you have a system in place to make it much easier on those working on code you wrote.

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But even in that scenario, you could likely see them reading their answer. These recorded/face-to-face answers would also give the interviewer insight into soft skills like communication, comprehension, and confidence. After creating the front-end engineer interview questions, you will need to determine the best ways to ask them. Some questions are better for face-to-face interviews, some for a written test, and others for an application scenario. This strategy can break up the interview process into a more digestible session.

Knowing what to expect at Google’s front-end interviews is important while building a robust front-end developer interview preparation strategy. Coding questions asked in front-end interviews are relatively easier than questions asked in back-end interviews. Questions asked are in the easy to medium difficulty level on Leetcode. Filtered is a leader in skills-based, data-driven recruiting technology. Our end-to-end technical hiring platform enables you to spend time reviewing only the most qualified candidates, putting skills and aptitude at the forefront of your decisions.

What Skills Are Needed To Be A Good Front

Be sure to cover topics like decreasing page load time, removing redundancies in your code, reducing file sizes, compressing content, minimizing page load requests, etc. Then, you’ll want to do some research of your own to prepare for any additional questions. For example, if you’re going to be using Kotlin for mobile development, you’ll want to practice questions around that language. Perform a simple Google search to find common interview questions, or touch base with other developers at the company and ask how to prepare. Behavioral interview questions are focused on who you are as a developer, as a teammate, and as an individual. These questions help the interviewer get to know who you are as a person, beyond your coding ability.

front end engineer interview questions

These libraries provide greater control over timing, easing functions, and sequencing while maintaining optimal performance. In such cases, I ensure that animations are optimized by leveraging requestAnimationFrame and avoiding layout thrashing. With class components, you use this.state and this.setState to manage local component state. Hooks provide the useState hook, allowing you to easily declare and update state variables within functional components without needing to convert them into class components. Once I’ve identified the key areas for refactoring, I prioritize them based on factors such as potential impact on performance, maintainability, and alignment with business requirements. Next, I develop a detailed plan outlining the steps required for each refactoring task, including any necessary testing and documentation updates.

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For integration testing, I use tools like Cypress or Selenium to simulate user interactions and test how different components work together within the application. This allows me to identify any potential bottlenecks or inconsistencies in the overall user experience. Additionally, I perform cross-browser and device testing to ensure compatibility and responsiveness across various platforms.

front end engineer interview questions

It runs a push after it has changed a local repository to share the changes with remote team members. MongoDb is a NoSQL database which shows the data elements using JSON-like Structure. To make changes in MongoDB the programmer has to use MongoBD Query Language. ClickJacking is an attack which lets the developer fool the users into thinking that they are clicking one thing but actually they are clicking the other one. It is basically a collection of rules for how variables are accessed and variables itself.

Mastering MERN: The Comprehensive Guide to Full Stack Development

Here are 15 Selenium interview questions to practice to help you prepare for your technical interview. So you might be asking what kinds of questions get asked in a senior engineer interview. This is again subjective and depends on who is interviewing you and what company you are applying to. But here are some of the questions I like to ask or have been asked and things I look for in an answer.

front end engineer interview questions

There usually wouldn’t be entire interview rounds just asking you quiz questions, but they could be sprung onto you in the middle of other interview rounds. We’ll introduce you to the various formats and you can read the dedicated pages for each type if you’d like to find out more. Your resume is the first opportunity to make an impression on potential employers and is crucial for getting shortlisted at your dream companies. If you are looking for a Front-end Developer job, you need to prepare for the 2023 Front end Developer Interview Questions. Here, we have prepared the critical Front end Developer Interview Questions and Answers to help you succeed in your interview. If one scope is nested inside another, code inside the innermost scope can access variables from either scope.

First, a front end developer must be skilled in at least three or four specific programming languages, namely HTML, CSS, and JavaScript. Additional knowledge of JavaScript is required to be able to add better functionality and advanced features to the website. Another significant benefit of clarifying ambiguities before you jump in is demonstrating that you are capable of user centered design.

front end engineer interview questions

This ensured that the dashboard remained functional and visually appealing on all devices. Prepare your answer by researching trends in front-end development and reflecting on your long-term career goals. When you’ve identified the trend, technique, software, or method you want to prioritize, write down your rationale. Examples include progressive web applications, server-side rendering, flexible design https://wizardsdev.com/en/vacancy/back-end-engineer-java-kotlin/ systems, and CSS data structures. A good developer (front end, back end, full stack) must be familiar with testing processes and identify how different methods of testing achieve different results. For example, manual testing for web applications and automated testing are common among developers, so your candidate should know what that is and what method (or methods) will fit your project best.