Free DEX602 Mock Exam – Practice Online Confidently

Refer to the following code:What will the console show when the button is clicked?

Refer to the code below:function changeValue(param) {Param =5;}Let a =10;Let b =5;changeValue(b);Const result = a+ '' - ''+ b;What is the value of result when code executes?

Refer to the code below:Function changeValue(obj) {Obj.value = obj.value/2;}Const objA = (value: 10);Const objB = objA;changeValue(objB);Const result = objA.value;What is the value of result after the code executes?

Refer to the code below:Const myFunction = arr => {Return arr.reduce((result, current) =>{Return result = current;}, 10};}What is the output of this function when called with an empty array ?

A developer is creating a simple webpage with a button. When a user clicks this buttonfor the first time, a message is displayed.The developer wrote the JavaScript code below, but something is missing. Themessage gets displayed every time a user clicks the button, instead of just the first time.01 function listen(event) {02 alert ( 'Hey! I am John Doe') ;03 button.addEventListener ('click', listen);Which two code lines make this code work as required?Choose 2 answers