Javascript Software Engineer Interview Questions

1,680 javascript software engineer interview questions shared by candidates

The interviewer asked questions mainly related to JavaScript concepts, React fundamentals, HTML/CSS basics, and basic problem-solving. Some questions were conceptual, while others required explaining real-world usage and examples.
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Javascript Developer

Interviewed at TO THE NEW

3.7
Dec 20, 2025

The interviewer asked questions mainly related to JavaScript concepts, React fundamentals, HTML/CSS basics, and basic problem-solving. Some questions were conceptual, while others required explaining real-world usage and examples.

1. Tell me about yourself ? 2. Tell me about your previous project and responsibilities? 3. difference b/w == and ===? 4. difference b/w let, const and var? 5. React render? 6. React DOM? 7. Promises in JS? 8. About CSS display flex and Grid? 9. RWD? 10. Angular router?
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JavaScript/Angular Developer

Interviewed at Orion Innovation

3.8
Oct 3, 2023

1. Tell me about yourself ? 2. Tell me about your previous project and responsibilities? 3. difference b/w == and ===? 4. difference b/w let, const and var? 5. React render? 6. React DOM? 7. Promises in JS? 8. About CSS display flex and Grid? 9. RWD? 10. Angular router?

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