How promises are better than callbacks?

645

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Explain what is libuv in node js?

686

---

How to use aggregation in mongoose?

727

---

Explain typecasting in javascript?

947

---

How to add/remove properties to object dynamically in javascript?

1000

---

Explain closures in javascript?

946

---

Explain event bubbling and event capturing in javascript?

977

---

Explain javascript event delegation model?

1031

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What is difference between var x =1; and x=1;?

1154

---

List few advantages of using javascript?

908

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How to get the last index of a string in javascript?

1032

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What is console.time() and console.timeend()? What is its syntax, and why is it used?

1046

---

How to call a function in every x seconds in javascript?

980

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What are different types of popup boxes available in javascript?

1013

---

How to convert javascript date to iso standard?

1142

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