Quiz 2026 Pass-Sure JavaScript-Developer-I: Accurate Salesforce Certified JavaScript Developer (JS-Dev-101) Prep Material

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Salesforce JavaScript-Developer-I Exam Syllabus Topics:

Section	Objectives
Topic 1: Testing and Debugging	- Unit testing principles - Debugging techniques and tools
Topic 2: JavaScript Language Fundamentals	- Functions, scope, and closures - Data types, variables, and operators - ES6+ syntax and features
Topic 3: Asynchronous JavaScript	- Promises and async/await - Event loop and concurrency model - Error handling in async workflows
Topic 4: Salesforce Platform Integration	- Lightning Web Components (LWC) JavaScript usage - Security considerations in Salesforce JavaScript - Calling Apex methods from JavaScript
Topic 5: Browser and DOM Interaction	- DOM manipulation and traversal - Browser APIs (fetch, storage, timers) - Event handling and propagation

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Salesforce Certified JavaScript Developer (JS-Dev-101) Sample Questions (Q118-Q123):

NEW QUESTION # 118
Refer to the code below:

After running this code, which result is displayed on the console?

A. > True
> False
B. > 5
> Undefined
C. > 5
> 0
D. > 5
>- 1

Answer: D

NEW QUESTION # 119
Refer to the code below:

Which value can a developer expect when referencing country,capital,cityString?

A. 'NaN'
B. 'London'
C. An error
D. undefined

Answer: A

NEW QUESTION # 120
The developer has a function that prints ''Hello'' to an input name. To test this, the developer created a function that returns world''.

What can the developer do to change the code to print ''Hello world''?

A. Change line 5 to function world () (
B. Change line 2 to console.log ( 'Hello', name () );
C. Change line 9 to sayhello (world () ;
D. Change line 7 to ) () ;

Answer: D

NEW QUESTION # 121
Which option is a core Node;js module?

A. Path
B. Memory
C. Ios
D. locale

Answer: A,C

NEW QUESTION # 122
Refer to the code below:
Let foodMenu1 = ['pizza', 'burger', 'French fries'];
Let finalMenu = foodMenu1;
finalMenu.push('Garlic bread');
What is the value of foodMenu1 after the code executes?

A. [ 'pizza','Burger', 'French fires', 'Garlic bread']
B. [ 'pizza','Burger', 'French fires']
C. [ 'Garlic bread']
D. [ 'Garlic bread' , 'pizza','Burger', 'French fires' ]

Answer: B

NEW QUESTION # 123
......

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