Amazon Front End Interview Questions

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Amazon is known to focus a lot on behavioral questions and their Leadership Principles. Hence be well-prepared in the non-technical aspects too.

Refer to Amazon's official interview preparation guides for:

• Front End Engineers
• Software Development Engineer

Trivia

• What is the CSS box model?
  • Read answer (Free)
• What is a JavaScript closure?
  • Read answer (Free)
• What happens when you type URL into a browser and hit enter?

JavaScript

• Implement Array.prototype functions like map, reduce, filter, sort.
  • Practice questions
• Given an object and a filter function, write a function that recursively filters the object, returning only values which return true when called with the filter function (like Array.prototype.filter but for objects).
• Implement a function getElementsByStyle(property, value) that returns all elements in the DOM that match that style.
  • E.g. getElementsByStyle("color", "#fff") will return all elements in the DOM with white text.
  • Practice question (Paid)
• Promisify a function.

User interface coding

• Implement a data table from an array of objects using HTML/CSS and JavaScript with searching and sorting.
  • Practice question (Paid)
• Implement Material UI Chips with auto-suggest. When sending an e-mail, auto-suggest people and convert them into a chip with their avatar on the right
• Implement a Like button. Source
  • Practice question (Paid)
• Code a paginated widget of addresses. Imagine you are a seller with a list of address you ship to an need to view them 5 address per page, with the possibility to go previous and next. Source
• Implement a search bar using HTML, CSS and JavaScript.
  • Read answer (Free)
• Implement a star rating widget.
  • Practice question (Free)
• Implement tic-tac-toe.
  • Practice question (Paid)
• Recreate an adaptive layout with flexbox. Ensure accessibility.
• Implement a chess board with movable pieces.
• How do you render text on a banner image?
• Render a directory tree given a nested JSON object.

System design

• Design a restaurant listing application where user can make orders and customize their orders by adding additional stuffs like toppings, salads etc. Source
• Design an accordion component.
  • Practice question (Paid)

Algorithm

Amazon does have rounds evaluating your Computer Science fundamentals by asking LeetCode-style questions. Do be prepared for them.

Source: Glassdoor Amazon Front End Engineer Interview Questions