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Front End Engineer Interview Questions

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Front End Engineer Interview Questions

A front end engineer is focused on the user experience of software or an app. During an interview, you will need to demonstrate that you understand UX/UI design principles, a commitment to clean code optimized for the product offering, and a willingness to work with backend engineers to solve problems. Expect to be asked about your technical experience, as well as your people management and design skills.

Top Front End Engineer Interview Questions & How to Answer

Question 1

Question #1: What is your preferred workflow/management style?

How to answer
How to answer: Outline what tools and methodologies you use to manage the development of a product. Talk about the strategies you use to work with a diverse range of stakeholders, including clients, sales and marketing, and back end engineers. Use specific examples to show how your workflow has been successful, and also express a willingness to adapt and change when necessary.
Question 2

Question #2: How do you manage testing, reviews and version control?

How to answer
How to answer: A lot of a front end engineer's role involves the nitty gritty details that make sure a user's experience is seamless. Highlight that you understand the importance of good clean code, testing protocols, and version management. Use examples of methodologies you have used and what problems they addressed or solved.
Question 3

Question #3: What excites you most about the UX/UI space?

How to answer
How to answer: A question like this is your opportunity to show that you are passionate about front end engineering. Explain how you integrate user-centered design in your projects and the philosophies that you follow. Outline any books or articles you have read and what you agree with. If possible, talk about what changes you foresee and how you think design and technology will adapt to those changes.

21,140 front end engineer interview questions shared by candidates

Write a function changeKey(obj, oldKey, newKey) that recursively replaces all occurrences of oldKey with newKey in an object or array. Do not change the key if it is "id". let obj = { id: 7373, data: [ { type: "1", id: 73 }, { name: "xyz", type: "23", vas_id: 73, x_data: [{ id: 72, data: { xx_data: { id: 673, a: ["id"] } } }, "id"], }, "abc", "id", 123, { id: { data: 123, id: ["a", "b"] } }, ], };
avatar

Front End React Developer

Interviewed at Fragma Data Systems

4.3★
Nov 6, 2024

Write a function changeKey(obj, oldKey, newKey) that recursively replaces all occurrences of oldKey with newKey in an object or array. Do not change the key if it is "id". let obj = { id: 7373, data: [ { type: "1", id: 73 }, { name: "xyz", type: "23", vas_id: 73, x_data: [{ id: 72, data: { xx_data: { id: 673, a: ["id"] } } }, "id"], }, "abc", "id", 123, { id: { data: 123, id: ["a", "b"] } }, ], };

1. What will be the output of the following code? let i = 1; function incrementByValue(value) { i += value; return i; } function limit(fn, maxCalls) { let calls = 0; return function (...args) { if (calls < maxCalls) { calls += 1; return fn(...args); } return undefined; }; } const callbytimes = limit(incrementByValue, 2); console.log(callbytimes(2)); console.log(callbytimes(3)); console.log(callbytimes(4)); console.log(callbytimes(10));
avatar

Front End React Developer

Interviewed at Fragma Data Systems

4.3★
Nov 6, 2024

1. What will be the output of the following code? let i = 1; function incrementByValue(value) { i += value; return i; } function limit(fn, maxCalls) { let calls = 0; return function (...args) { if (calls < maxCalls) { calls += 1; return fn(...args); } return undefined; }; } const callbytimes = limit(incrementByValue, 2); console.log(callbytimes(2)); console.log(callbytimes(3)); console.log(callbytimes(4)); console.log(callbytimes(10));

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