Snapmint Senior Front End Developer Interview Questions

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Senior Front End Developer Interview

9 Mar 2026

Anonymous interview candidate

No offer

Positive experience

Average interview

Application

I applied online. The process took 2 days. I interviewed at Snapmint in Mar 2026

Interview

I interviewed for Frontend Developer II. The interview was medium to hard, with concise, focused questions aimed at evaluating a deep understanding of the tech stack. Answering them required solid technical knowledge and practical experience.

Interview questions [2]

Question 1

Write a function mergeObjects(obj1, obj2) that merges these two objects example const obj1 = { a: 1, h: [1, 2, 3], c: { x: 10, y: 20 } }; const obj2 = { b: 2, h: [4, 5], c: { y: 30, z: 40 } }; Output { a: 1, b: 2, h: [1,2,3,4,5], c: { x: 10, y: 30, z: 40 } }

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Question 2

Q1. What is CDN caching? Q2. What is the Critical Rendering Path (CRP)? Q3. Explain CSR, SSR, SSG, and ISR. Q4. What are reflow and repaint in the browser? Q5. Implement Infinite Scroll in ReactJS. Describe approach using scroll events or IntersectionObserver. Explain loading additional data when reaching the end of a container. Explain the use of key in React.

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Senior Front End Developer Interview

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Senior Front End Developer Interview