Free Salesforce DEX602 Exam Questions
Absolute Free DEX602 Exam Practice for Comprehensive Preparation
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Salesforce DEX602 Exam Questions
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Provided By: Salesforce
- Exam: Program Lightning Web Components
- Certification: Javascript Developer
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Total Questions: 217
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Updated On: Jan 14, 2026
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Rated: 4.9 |
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Online Users: 434
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Question 1
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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
Answer: C,D
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Question 2
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Considering type coercion, what does the following expression evaluate to?True + '13' + NaN
Answer: D
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Question 3
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What is the result of the code block?
Answer: D
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What is the result of the code block?
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Question 4
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Which javascript methods can be used to serialize an object into a string and deserializea JSON string into an object, respectively?
Answer: A
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Question 5
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Refer to the code below:Const resolveAfterMilliseconds = (ms) => Promise.resolve (setTimeout (( => console.log(ms), ms ));Const aPromise = await resolveAfterMilliseconds(500);Const bPromise = await resolveAfterMilliseconds(500);Await aPromise, wait bPromise;What is the result of running line 05?
Answer: B
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