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- What is JavaScript?
- What are the different data types in JavaScript?
- Explain the difference between
undefined and null.
- What is the difference between
== and === in JavaScript?
- How do you declare variables in JavaScript?
- Explain the concept of hoisting.
- What are closures in JavaScript?
- What is the event loop in JavaScript?
- How does prototypal inheritance work in JavaScript?
- What are arrow functions in JavaScript? How are they different from regular functions?
- Explain the difference between
let, const, and var.
- How do you handle asynchronous programming in JavaScript?
- What are promises in JavaScript?
- Explain the difference between callbacks, promises, and async/await.
- How do you handle errors in JavaScript?
- What is the difference between
setTimeout and setInterval?
- How do you clone an object in JavaScript?
- What are the different ways to loop through an array in JavaScript?
- How do you check if a variable is an array in JavaScript?
- What is the
this keyword in JavaScript?
- Explain the concept of lexical scoping.
- How do you add an element to the beginning and end of an array in JavaScript?
- What are template literals in JavaScript?
- Explain the concept of currying.
- How do you convert a string to a number in JavaScript?
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