Add Javascript Challenging Question for often asked in Interview

[KomalSrivastava]

Summary

• Addition: Added JavaScript challenging interview questions that are often asked and tricky to solve.
• Purpose: This section helps developers prepare for technical interviews by presenting concise, thought-provoking JavaScript questions that test deeper understanding of the language.

Changes Made

1. Added JavaScript Questions:

   • Included small but tricky JavaScript questions covering topics like closures, hoisting, scoping, and the event loop.

2. Added One Article in the Article Section:

   • A new article was added, explaining key JavaScript concepts.
   • Provided a link to this article for further reading.

Reasoning

• Rationale: Some concepts were missing or not thoroughly explained, so I added challenging JavaScript questions to bridge the gaps.
  • A Gist is also provided for further clarification of missing concepts.
  • Lines and spacing have been added for improved readability in the README.

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JavaScript Often Asked Small but Tricky Questions

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

   • == compares values with type coercion.
   • === compares both value and type strictly.

2. What are closures in JavaScript?

   • A closure is a function that retains access to its lexical scope, even when executed outside of that scope.

3. Explain event delegation.

   • Event delegation is a technique where a single event listener is added to a parent element to handle events from its child elements.

4. What is the output of the following?

   console.log(typeof null); // "object"
   
   

@leonardomso Hello Sir, Kindly assign me this issue i will work on it!! Thank you..

[ryzen-xp]

/assign

[Abhayp2004]

/assign, would love to contribute

[Shruti2110-coder]

please assign this to me