JawaScript Practice Questions

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Ye Questions JavaScript ke interview me Puchhe ja chuke hai.

Q1 - console.log('A' + 3); What is output. Ans is - A3

Esme Error nhi aayga dono concat ho jayga 

 Q2 - console.log('Name' + '100'); What is output. Ans is - Name 100

Ye dono to str hi hai to ye bhi contact ho jayga.

 Q3 - console.log('2' +2+ '2'); What is output. Ans is - 222

Esame pahala 2 str hai or 2sara 2 int hai to ye dono concat ho jaynge or 22 ho jaynge fir 3sara 2 str hai to ye un dono 2 me contact ho jayga.

 Q4 - console.log('2' +2- '2'); What is output. Ans is - 20

1st 2 or 2nd 2 contact hokar 22 ho jaynge fir last 2 - ho jayga 22 me se = 22 -2 = 20

 Q5 - Print NaN in to methods.

        1. console.log('Name' - 3); Ans is NaN

        2. console.log(true * 'abc');Ans is NaN

1. Str me se ham number - nhi kar sakte hai. Esliy result is Not a number aayga.

2. True ka matlab hai 1 to ye ak number ho gya or number se str me ham koe bhi calculation nhi kar sakte hai. 





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