Software Engineer Front End Interview Questions

866 software engineer front end interview questions shared by candidates

Can you explain the difference between the Task (Macrotask) Queue and the Microtask Queue in the JavaScript Event Loop? Specifically, how does the browser prioritize Promise resolutions over scheduled callbacks from a setTimeout function, and what impact does this have on UI rendering performance?
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Software Engineer - Front End

Interviewed at Amazon

3.5
Mar 25, 2026

Can you explain the difference between the Task (Macrotask) Queue and the Microtask Queue in the JavaScript Event Loop? Specifically, how does the browser prioritize Promise resolutions over scheduled callbacks from a setTimeout function, and what impact does this have on UI rendering performance?

Step 1: - HR Screening Step 2: - Code Interview, 2 LeetCode style questions Easy/Medium Step 3: - Code Interview - 1 LeetCode style Medium/Hard - System Design Step 4: - FE Code Interview - React - Manager/Culture Interview
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Front End Software Engineer

Interviewed at Datadog

4
Jan 25, 2024

Step 1: - HR Screening Step 2: - Code Interview, 2 LeetCode style questions Easy/Medium Step 3: - Code Interview - 1 LeetCode style Medium/Hard - System Design Step 4: - FE Code Interview - React - Manager/Culture Interview

1st tech 1.Tell me about yourself 2.basic qstns about html and css 3.css positions-absolute sticky 4.diff between inline, block and inline-block 5.oops concepts, diff between overloading and overriding 6. Sorting 7.Puzzles 2nd tech database used in project, why we used that primary key
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Software Developer - Front End

Interviewed at redBus India

4.4
Jan 8, 2021

1st tech 1.Tell me about yourself 2.basic qstns about html and css 3.css positions-absolute sticky 4.diff between inline, block and inline-block 5.oops concepts, diff between overloading and overriding 6. Sorting 7.Puzzles 2nd tech database used in project, why we used that primary key

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