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Junior Frontend Developer Interview Questions

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13,303 junior frontend developer interview questions shared by candidates

1. Closures and implement it 2. Output of this let isFlag = true setTimeout(() => isFlag = false, 10); while (isFlag) { console.log("hello"); } 3. Shallow copy and deep copy of objects along with a output question 4. Polyfills 5. implement a polyfill for array.reduce 6. Implement a missing closure function 7. Flatten a nested object 8. Implement a usePrevious custom hook 9. Difference between useCallback and useMemo 10. Bridges in react native 11. Difference in old and new architecture of react native
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Senior Frontend Developer

Interviewed at Zepto (India)

3.2★
Aug 7, 2024

1. Closures and implement it 2. Output of this let isFlag = true setTimeout(() => isFlag = false, 10); while (isFlag) { console.log("hello"); } 3. Shallow copy and deep copy of objects along with a output question 4. Polyfills 5. implement a polyfill for array.reduce 6. Implement a missing closure function 7. Flatten a nested object 8. Implement a usePrevious custom hook 9. Difference between useCallback and useMemo 10. Bridges in react native 11. Difference in old and new architecture of react native

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