null vs undefined in JavaScript | Interview Question Explained with Real-Life Examples & Insights

❓ null vs undefined — two of the most confusing concepts in JavaScript interviews.
But do you really know how they differ?

🔍 At a glance, both look like “nothing”...
But in JavaScript, they’re completely different!

✅ undefined means a variable has been declared but not assigned a value.
✅ null is intentionally assigned to represent “no value” or “nothing”.

🔗 Think of it like this:

undefined is JavaScript saying: “I don’t know yet.”

null is you saying: “This is nothing — on purpose.”


⚠️ In interviews, most beginners confuse them or assume they’re the same.
But interviewers love asking this to test your core JS understanding.

🧠 Wanna stand out in interviews?
👉 Master the why behind each concept, not just the definition.

🚀 I’ve broken it down visually in this reel – watch it till the end and boost your JavaScript fundamentals!


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#Javascript #frontend_interview_questions_and_answers #javascript_interview_questions_and_answers #javascript_junior_interview_questions #javascript_learning #javascript_null_vs_undefined #js_undefined #undefined_vs_null_js #web_developer_interview_questions_and_answers #web_development #what_is_the_difference_between_null_and_undefined #what_is_the_difference_between_null_and_undefined_in_javascript

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