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1. How many ways can Remove Elements From A JavaScript Array?
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2. What is a `WeakSet` in ES6?
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3. So, how do you delete an element from a JavaScript array?
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4. What is Proxy in ES6?
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5. What is Callback and Callback Hell in JavaScript?
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6. What is the difference between const and Object.freeze()?
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7. What is the use of use strict in JavaScript?
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8. What is Event Propagation?
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9. Why does the following not work as an IIFE (Immediately Invoked Function Expressions)? What needs to be modified in order for it to be classified as an IIFE?
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10. What is AJAX in JavaScript?
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