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End Developer Junior Front Interview Questions

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15,880 end developer junior front interview questions shared by candidates

Non ci sono state domande tecniche sul Front-end, ma un task molto complicato che prevedeva uno studio su determinate cose legate al loro settore (ESA e altre aziende nel campo aerospaziale). Le indicazioni erano molto vaghe, le tecnologie usate nel progetto sono state un mistero fino alla fine.
avatar

Front End Developer

Interviewed at CGI

3.7★
May 4, 2022

Non ci sono state domande tecniche sul Front-end, ma un task molto complicato che prevedeva uno studio su determinate cose legate al loro settore (ESA e altre aziende nel campo aerospaziale). Le indicazioni erano molto vaghe, le tecnologie usate nel progetto sono state un mistero fino alla fine.

1. If I start a startup would I prefer writing unstructured code in two month or clean, efficient, testable code in a year. (Comparing 2 vs 12 months is a totally unrealistic example. Experienced developer would add new features faster when she/he has clean and well designed code base. There will be fewer bugs also. A good code base would never take 6 times longer to develop.) 2. Would I spend time to add a feature to Web app or to migrate it to ES6? 3. Why do some of TransferWise users drop off at the fourth transfer flow process, which is entering billing information? 4. What would I change to make more users to enter their billing information? 5. How would I know that my change improved the statistics if there were 10 more changes?
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Front-end Web Developer

Interviewed at Wise

3.6★
Sep 14, 2015

1. If I start a startup would I prefer writing unstructured code in two month or clean, efficient, testable code in a year. (Comparing 2 vs 12 months is a totally unrealistic example. Experienced developer would add new features faster when she/he has clean and well designed code base. There will be fewer bugs also. A good code base would never take 6 times longer to develop.) 2. Would I spend time to add a feature to Web app or to migrate it to ES6? 3. Why do some of TransferWise users drop off at the fourth transfer flow process, which is entering billing information? 4. What would I change to make more users to enter their billing information? 5. How would I know that my change improved the statistics if there were 10 more changes?

Serialise IDs from a nested tree of items
 const data = [
  { id: 1, items: [{ id: 4, items: [{id: 5}, {id: 6, items: [{id: 8}]}]}]},
  { id: 2, items: [{ id: 7}]},
  { id: 3 },
  { id: 9, items: [{id: 10, items: [{id: 12}]}, {id: 11}] }
];

// Should return [1, 2, 3, 9, 4, 7, 10, 11, 5, 6, 12, 8] 
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Senior Front End Developer

Interviewed at Apple

4.1★
Nov 10, 2017

Serialise IDs from a nested tree of items
 const data = [
  { id: 1, items: [{ id: 4, items: [{id: 5}, {id: 6, items: [{id: 8}]}]}]},
  { id: 2, items: [{ id: 7}]},
  { id: 3 },
  { id: 9, items: [{id: 10, items: [{id: 12}]}, {id: 11}] }
];

// Should return [1, 2, 3, 9, 4, 7, 10, 11, 5, 6, 12, 8] 

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