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What is middleware in Express?

Which file manages dependencies in Node.js?

setTimeout(() => console.log("A"), 0);
console.log("B");

Which keyword creates block scope?

let a = 5;
let b = a++;
console.log(a, b);

console.log(typeof NaN);

What does process.nextTick() do?

Which is NOT part of Node.js event loop phases?

console.log([] == false);

What is closure in JavaScript?