Practice Questions - Salesforce Certified JavaScript Developer

Question 1

Which syntax declares a variable in JS?
A. var
B. let
C. const
D. All of the above

Correct Answer: D. All of the above

Question 2

How do you handle events in LWC?
A. Apex trigger
B. Event listeners in JS
C. Flow
D. Process Builder

Correct Answer: B. Event listeners in JS

Question 3

What does 'this' keyword refer to?
A. The global object
B. The current instance
C. A function argument
D. A variable

Correct Answer: B. The current instance

Question 4

Which method updates a property reactively in LWC?
A. @track
B. @api
C. @wire
D. All of the above

Correct Answer: A. @track

Question 5

How to call Apex method from JS?
A. @wire
B. @api
C. import {method}
D. trigger

Correct Answer: C. import {method}




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