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একটি Lesson Select করুন।
Frequently Asked Questions
1. The difference between
var, let, and
const.
var is function-scoped, let is
block-scoped, and const
is block-scoped but immutable.
2. The difference between
map(),
forEach(), and filter().
map() returns a new array, forEach()
iterates without
returning, and filter() returns a new array with matching elements.
3. Explain arrow functions
and how they
are different from regular functions.
Arrow functions have a shorter syntax and
do not bind
their own this, unlike regular functions.
4. How JavaScript Promises
work?
JavaScript Promises handle asynchronous
operations by
representing a value that may be available now, later, or never.
5. How closures work in
JavaScript?
Closures in JavaScript allow a function to
remember and
access its lexical scope even when executed outside that scope.