Senior Front End Developer Interview Questions

1,429 senior front end developer interview questions shared by candidates

1. Prototypal inheritance vs inheritance 2. Scoping (Multiple trick questions , scope chain) 3. Closure 4. Apply and Bind 5. Event Loop 6. Callback(asynchronus concepts in Javascript), Async,await 7. Promise 8. ES6(Arrow function , Classes,Object literals, Spread and Rest, destructuring ) 9. Diff bet map and set 10. Hoisting , (let/var/const) 11. What is prototype 1. Whats new in HTML5 compared to HTML 2. A few questions on canvas, header, nav 3. What are semantic elements in HTML 4. Name new form elements you used in HTML5 1. Diff bet external/internal/inline css 2. How to make page responsive using just css 3. Diff bet block and inline block 4. About position property, when to use what value 5. Whats a pseudo class 6. Flexbox
avatar

Senior Front End Developer

Interviewed at Accenture

3.7
Jun 4, 2021

1. Prototypal inheritance vs inheritance 2. Scoping (Multiple trick questions , scope chain) 3. Closure 4. Apply and Bind 5. Event Loop 6. Callback(asynchronus concepts in Javascript), Async,await 7. Promise 8. ES6(Arrow function , Classes,Object literals, Spread and Rest, destructuring ) 9. Diff bet map and set 10. Hoisting , (let/var/const) 11. What is prototype 1. Whats new in HTML5 compared to HTML 2. A few questions on canvas, header, nav 3. What are semantic elements in HTML 4. Name new form elements you used in HTML5 1. Diff bet external/internal/inline css 2. How to make page responsive using just css 3. Diff bet block and inline block 4. About position property, when to use what value 5. Whats a pseudo class 6. Flexbox

1. Multiple questions on this object like what is this, they asked me find the value of this on from the JS snippets. 2. Flatten a multidimensional array without using inbuilt function. 3. Debounce/Throttling, Closures, Arrow functions & how it is different from normal function, Web worker, Service worker, Webpack, Typescript 4. Difference between px, rem, em and write css for some problem(flex grow/shrink) 4. React all hooks, Redux, React design pattern, improve site security, improve site performance, how to override console log output, pure component, error boundaries 5. Solid principle, Unit testing
avatar

Senior Front End Developer

Interviewed at EPAM Systems

4
Mar 9, 2022

1. Multiple questions on this object like what is this, they asked me find the value of this on from the JS snippets. 2. Flatten a multidimensional array without using inbuilt function. 3. Debounce/Throttling, Closures, Arrow functions & how it is different from normal function, Web worker, Service worker, Webpack, Typescript 4. Difference between px, rem, em and write css for some problem(flex grow/shrink) 4. React all hooks, Redux, React design pattern, improve site security, improve site performance, how to override console log output, pure component, error boundaries 5. Solid principle, Unit testing

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