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Salesforce JavaScript-Developer-I Exam Syllabus Topics:

Section	Weight	Objectives
Topic 1: Debugging and Error Handling	7%	- Console methods and logging - Error types and exception handling - Defensive programming practices - Debugging tools and breakpoints
Topic 2: Browsers and Events	17%	- Document Object Model (DOM) manipulation - Window and document object properties - Script loading and execution order - Event handling, propagation, and delegation - Browser APIs and Web Storage
Topic 3: Testing	7%	- Unit testing concepts - Test doubles and mocks - Testing frameworks and assertions - Code coverage and best practices
Topic 4: Variables, Types, and Collections	23%	- Array methods and data manipulation - Truthy and falsy values - JSON parsing and usage - Type coercion and conversion rules - Working with strings, numbers, dates, and booleans - Variable declaration and initialization
Topic 5: Server-Side JavaScript	8%	- Core Node.js modules - Command-line tools and scripts - Module system and require/import - Node.js fundamentals and runtime
Topic 6: Asynchronous Programming	13%	- Promises and chaining - Event loop and micro/macro tasks - Callbacks and callback hell - Async/await syntax - Fetch API and HTTP requests
Topic 7: Objects, Functions, and Classes	25%	- Decorators and advanced function patterns - Function definitions, parameters, and scope - Closures and execution context - Object creation, properties, and methods - Class syntax, inheritance, and prototypes - Modules and imports/exports

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Salesforce New JavaScript-Developer-I Exam Price: Salesforce Certified JavaScript Developer (JS-Dev-101) - ITexamReview Updated Download

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Salesforce Certified JavaScript Developer (JS-Dev-101) Sample Questions (Q88-Q93):

NEW QUESTION # 88
Which option is true about the strict mode in imported modules?

A. Add the statement use strict =false; before any other statements in the module to enable
not- strict mode.
B. Add the statement use non-strict, before any other statements in the module to enable
not-strict mode.
C. Imported modules are in strict mode whether you declare them as such or not.
D. You can only reference notStrict() functions from the imported module.

Answer: D

NEW QUESTION # 89
A developer publishes a new version of a package with bug fixes but no breaking changes. The old version number was 2.1.1.
What should the new package version number be based on semantic versioning?

A. 2.2.0
B. 2.2.1
C. 3.1.1
D. 2.1.2

Answer: D

Explanation:
Semantic versioning: MAJOR.MINOR.PATCH
* MAJOR: incompatible API changes.
* MINOR: add functionality in a backward compatible manner.
* PATCH: backward compatible bug fixes.
Here:
* Bug fixes only, no breaking changes # increment PATCH.
* From 2.1.1 to 2.1.2.
So the correct new version is 2.1.2.

NEW QUESTION # 90
A developer wants to use a module named universalContainerLib and then call functions from it.
How should a developer import every function from the module and then call the functions foo and bar?

A. import - as lib from '/path/universalContainerLib.js''
lib.foo( ) ;
lib. bar ( ) ;
B. import (foo,bar) from '/path/universalContainerLib.js''
foo ( ) ;
bar ( ) ;
C. import all from '/path/universalContainerLib.js''
universalContainersLib.foo( ) ;
universalContainersLib bar ( ) :
D. import + from '/path/universalContainerLib.js''
universalContainersLib.foo( ) ;
universalContainersLib bar ( ) :

Answer: A

NEW QUESTION # 91
Given the code below:
const copy = JSON.stringify([ new String(' false '), new Bollean( false ), undefined ]); What is the value of copy?

A. -- [ false, { } ]--
B. -- [ \"false\" , false, undefined ]--
C. -- [ \"false\" ,false, null ]--
D. -- [ \"false\" , { } ]--

Answer: C

NEW QUESTION # 92
Refer to the following code:

What is the output of line 11?

A. ["foo", "bar"]
B. ["bar", "foo"]
C. ["foo:1", "bar:2"]
D. [1,2]

Answer: A

NEW QUESTION # 93
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