Tricky javascript practical interview question and answer |

Tricky javascript practical interview question and answer | #FEDevInterview #jsinterview #jsshorts
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[@succeedwithuttam2271]

Didn't understand the question 1 and 12. Could you please explain more about it.

[@overPowerPenguin]

1. JavaScript converts the Array to a String:
String([]) + String([])
That means it concatenate two empty String primitives:
"" + "" = ""
12. As above, the concatenation operator converts both, the Array and Object to a String:
String([]) + String({})
Only that here this result in:
"" + "[object Object]" = "[object Object]"
So you concatenate an empty String with some other String.

[@frontendInsights]

Thanks for explanation

[@princesstechideas]

Nice 🙂 sir

[@frontendInsights]

Keep watching

[@saikiran0311]

4th question return the object{message:"hello"}

[@frontendInsights]

ohh, let me check once. Thanks

[@mayurchaudhari5947]

Nice explanation..

[@frontendInsights]

Thanks and welcome, Keep watching

[@adishjain2507]

typeof undefined == typeof null is false -> typeof undefined - 'undefined' typeof null - 'object', question 4output is also not correct function greet(){return {message:'Hello'};}
undefined
console.log(greet());
output: {message: 'Hello'}