• What is JavaScript & how JavaScript works?
• What are JavaScript engine v8 and its internal mechanism?
• Explain JavaScript execution context and call stack.
• What is single-threaded & explain synchronous vs asynchronous.
• Explain Promise, async/ await.
• SetInterval and clearInterval.
• JavaScript event loop and concurrency.

Interview Questions

• Tell me something about js engine v8 internal mechanism.
• What is an event loop in javascript?
• If javascript is single-threaded, how does it handle the asynchronous calls?
• Difference between setTimeOut and setInterval.
• Can you explain the difference between an async and a regular function in javascript?
• What’s the error handling strategy for promises that were rejected and awaiting?
• What are the states of promise?
• Can you explain what the .then() method does?