Callback must be a function. Received 'utf-8'

 Error :- 

Last 1 Keys:

 UpArrow

Exception:

System.ArgumentOutOfRangeException: The value must be greater than or equal to zero and less than the console's buffer size in that dimension.

Parameter name: top

Actual value was -1.

  

TypeError [ERR_INVALID_CALLBACK]: Callback must be a function. Received 'utf-8'

    

Asyuncronous me apne fallback nahi likha hai …

Error Code :- var fs = require('fs');

fs.readFile("test.txt",'utf-8');

console.log("Testing is done");

Solved Code:- 

var fs = require('fs');

fs.readFile("test.txt",'utf-8',(err,data)=>{

  console.log(data)

});

console.log("Testing is done");