30 Must-Know Questions and Answers for Every JavaScript Developer
1. What is JavaScript and what is it used for? JavaScript is a high-level, dynamic, and interpreted programming language. It’s used for front-end web development, creating interactive effects within a web page. 2. What are the differences between var, let, and const in JavaScript? var is function scoped, let and const are block scoped. var can be re-declared, let and const can’t. const can’t…
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