Consider the code below.

calculator.js 

exports.add=function (num1,num2){ 
       return num1+num2; 
} 
exports.sub=function (num1,num2){ 
        return num1-num2; 
} 

TestCalculator.js 

var cal=require("./calculator"); 

Which of the below statements is  true with respect to the code in TestCalculator.js file?

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