
JavaScript
May 27, 2025 at 08:01 AM
*JavaScript Interview Questions with Answers*:
1. *What are the different data types in JavaScript?*
JavaScript has string, number, boolean, null, undefined, object, and symbol data types.
2. *What is hoisting in JavaScript?*
Hoisting means variable and function declarations are moved to the top of their scope before code execution, so you can use them before they're defined.
3. *What’s the difference between == and ===?*
`==` checks for value equality with type conversion, while `===` checks for both value and type equality.
4. *What is a closure?*
A closure is a function that remembers its outer scope even after the outer function has finished executing.
5. *What are promises in JavaScript?*
Promises handle asynchronous operations, letting you run code after an async task completes (resolved) or fails (rejected).
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