Free Salesforce DEX602 Exam Questions

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

Refer to the code below?Let searchString = ' look for this ';Which two options remove the whitespace from the beginning of searchString?Choose 2 answers

What is the result of the code block?

Given two expressions var1 and var2. What are two valid ways to return the logical ANDof the two expressions and ensure it is data type Boolean ?Choose 2 answers:

A developer has two ways to write a function:Option A:function Monster(){this.growl = ()=>{console.log('Grr!');}}Option B:function Monster(){};Monster.prototype.growl = ()=>{console.log('Grr!');}After deciding on an option, the developer creates 1000 monster objects.How many growl methods are created with Option A and Option B?