Q61.

What is Service Worker?

Q62.

Explain JavaScript module bundling.

Q63.

What is tree shaking?

Q64.

Explain functional programming in JavaScript.

Q65.

What is composition over inheritance?

Q66.

Explain Proxy object.

Q67.

What is Reflect API?

Q68.

Explain Symbol data type.

Q69.

What is tail call optimization?

Q70.

Explain performance optimization techniques.