Chewy Senior Front-End Engineer Phone Interview Experience

Overview

This document details a candidate's phone interview experience for a Senior Front-End Engineer role at Chewy. The interview focused on assessing the candidate's knowledge of fundamental front-end technologies and their practical application. The interview included technical questions and a React-based coding challenge.

Interview Rounds

The initial phone interview covered a range of topics relevant to a senior front-end engineer. The interviewer posed questions to evaluate the candidate's understanding of JavaScript, React, TypeScript, CSS fundamentals, and API design principles.

Technical Questions:

1. Asynchronous JavaScript: How to execute two asynchronous functions in parallel and wait for both to resolve before proceeding.
2. CSS Display Properties: An inquiry regarding the different types of CSS display properties.
3. Flexbox: A question defining Flexbox and its purpose.
4. RESTful Services: The candidate was asked about the methods used in RESTful services (e.g., GET, POST, PUT, DELETE).
5. TCP Protocol: What protocol is utilized by TCP?
6. React Functional Components: Definition of functional components in React.
7. CSS Block and Inline Elements: Identifying block-level and inline elements in CSS.
8. Event Listeners in React: How to add an event listener to the window object within a React component, and how to properly clean up the effect using useEffect.
9. JavaScript vs. TypeScript: Differences between JavaScript and TypeScript.
10. TypeScript Classes vs. Interfaces: Key distinctions between classes and interfaces in TypeScript.
11. PATCH Method: The interviewer asked if the candidate had experience using the PATCH method in RESTful APIs.
12. CSS Units: Explanation of the differences between rem, em, and px units in CSS.
13. Async/Await: Understanding the purpose and usage of async/await in JavaScript.
14. Race Condition: Defining what a race condition is.

React Coding Question: Movie List

The candidate was presented with a React coding challenge requiring the development of a movie list component with the following specifications:

• An input field where users can enter a year to search for movies released in that year.
• A 'Search' button that triggers an API call to https://jsonmock.hackerrank.com/api/moviesdata?Year={input} using the API.