Top 10 JavaScript Interview Questions and Answers (2024)

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What is ECMA in JavaScript?

ECMA is a non-profit organization that creates standards. One of the Standards developed by ECMA is ECMA Script.

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What is typeof() in Javascript?

In JavaScript, the typeof() operator determines the type of a variable or an expression.

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What is a call Stack in JavaScript?

The call stack is a mechanism used to keep track of function calls in a program.

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What are the different datatypes in JavaScript?

In JavaScript, there are several built-in data types,
1) Primitive Types
2) Composite Types
3) Special Data Types
4) Other

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Q) Why do we call JavaScript as dynamic language?
A) JavaScript is dynamic because of its flexible typing, allowing variables to change types at runtime.

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Why JavaScript Is Single Threaded Question 1

JavaScript is single-threaded because it runs in a single execution context. This means it processes one task at a time in a single call stack. It manages user interactions and UI updates without blocking the main thread.

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