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  1. What is the difference between null and undefined?

Ans:

null : khali man k bujai

undefined: kono veriavle define kora nai;

  1. What is the use of the map() function in JavaScript? How is it different from forEach()?

Map(): array er sobgulo upadan pawa jonno

ForEach(): Map er moto kaj kore kintu result lagbe na

  1. What is the difference between == and ===?

== bolte bojai value soman ki na

=== bolte bujai value plus type soman ki na

  1. What is the significance of async/await in fetching API data?

amra code k sundor vabe gusiye lekhar jonno async use kori ar await use kore amra variable er modhe data peye jai ja sohoje developer porte ba bujte pare ar async/await use na kore fetch use korle bujte somocha hobe onno developer der jonno

  1. Explain the concept of Scope in JavaScript (Global, Function, Block).

function er baire thakle global scope

baire thake variable er maner kicu kora jabe na kintu return korbe

block scope bairer kono data nibe na

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