2026 Salesforce Latest JavaScript-Developer-I Latest Braindumps Ppt

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Salesforce JavaScript-Developer-I Exam Syllabus Topics:

Section	Weight	Objectives
Topic 1: Browser and Events	17%	- Event handling and listeners - Interacting with forms and user input - DOM manipulation - Event propagation (bubbling and capturing) - Browser-specific APIs - Browser Developer Tools usage
Topic 2: Asynchronous Programming	13%	- Async/Await syntax - Callbacks - Asynchronous patterns for business requirements - Promises (creation, chaining, error handling) - Event loop and execution flow
Topic 3: Server Side JavaScript	8%	- Node.js fundamentals - CLI commands - Server-side JavaScript implementations - Package management (npm) - Core Node.js modules
Topic 4: Testing	7%	- Unit testing concepts - Test effectiveness evaluation - Test coverage and reliability - Writing and modifying unit tests
Topic 5: Objects, Functions, and Classes	25%	- Prototypal inheritance - ES6 classes and inheritance - Arrow functions - Function declarations and expressions - Object creation and manipulation - Execution flow and context - Modules and decorators - Higher-order functions - Variable scope and closures
Topic 6: Debugging and Error Handling	7%	- Console methods for debugging - Custom error types - Error handling techniques (try/catch/finally) - Breakpoints and code inspection
Topic 7: Variables, Types, and Collections	23%	- Truthy and falsy evaluations - Variable declarations and initialization - Primitive and complex data types - JSON parsing and manipulation - Type coercion and conversion - Arrays and collections - Strings, numbers, and dates

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Salesforce Certified JavaScript Developer (JS-Dev-101) Sample Questions (Q129-Q134):

NEW QUESTION # 129
A developer has a fizzbuzz function that, when passed in a number, returns the following:
* ' fizz ' if the number is divisible by 3.
* ' buzz ' if the number is divisible by 5.
* ' fizzbuzz ' if the number is divisible by both 3 and 5.
* Empty string ' ' if the number is divisible by neither 3 nor 5.
Which two test cases properly test scenarios for the fizzbuzz function?

A. let res = fizzbuzz(3);
console.assert(res === ' ' );
B. let res = fizzbuzz(true);
console.assert(res === ' ' );
C. let res = fizzbuzz(5);
console.assert(res === ' fizz ' );
D. let res = fizzbuzz(15);
console.assert(res === ' fizzbuzz ' );

Answer: B,D

Explanation:
First, recall the fizzbuzz rules:
* If n divisible by 3 and not by 5 # return ' fizz ' .
* If n divisible by 5 and not by 3 # return ' buzz ' .
* If n divisible by both 3 and 5 # return ' fizzbuzz ' .
* Otherwise # return ' ' (empty string).
Evaluate each test:
Option A:
let res = fizzbuzz(true);
console.assert(res === ' ' );
In JavaScript, when using arithmetic operations with true, it is coerced to the number 1. A typical implementation of fizzbuzz would treat the argument as a number and compute:
* true % 3 # 1 % 3 # 1
* true % 5 # 1 % 5 # 1
So true is effectively treated as 1, which is divisible by neither 3 nor 5. The function should return ' ' . The assertion res === ' ' will pass.
This test covers the scenario "neither divisible by 3 nor 5".
Option B:
let res = fizzbuzz(3);
console.assert(res === ' ' );
* 3 is divisible by 3 but not by 5.
* According to fizzbuzz rules, fizzbuzz(3) should return ' fizz ' .
* This test expects ' ' , so it is incorrect; the assertion would fail in a correct implementation.
Option C:
let res = fizzbuzz(5);
console.assert(res === ' fizz ' );
* 5 is divisible by 5 but not by 3.
* According to fizzbuzz rules, fizzbuzz(5) should return ' buzz ' .
* This test expects ' fizz ' , so it is incorrect.
Option D:
let res = fizzbuzz(15);
console.assert(res === ' fizzbuzz ' );
* 15 is divisible by both 3 and 5.
* According to fizzbuzz rules, fizzbuzz(15) should return ' fizzbuzz ' .
* This assertion correctly matches the expected result, so it is a proper test case.
Thus, the two test cases that correctly test valid fizzbuzz behavior are:
The answer: A, D
Study Guide / Concept References (no links):
* Modulo operator (%) for divisibility checks
* Truthy/number coercion of boolean true in arithmetic (Number(true) === 1)
* Designing unit tests with console.assert
* Typical fizzbuzz logic structure and expected outputs

NEW QUESTION # 130
Refer to the code snippet:

What is the value of array after the code executes?

A. 1, 2, 3, 4, 4, 5, 4
B. 1, 2, 3, 4, 5, 4, 4
C. 1, 2, 3, 5
D. 1, 2, 3, 4, 5, 4

Answer: C

NEW QUESTION # 131
A developer wants to leverage a module to print a price in pretty format, and has imported a method as shown below:
Import printPrice from '/path/PricePrettyPrint.js';
Based on the code, what must be true about the printPrice function of the PricePrettyPrint module for this import to work ?

A. printPrice must be an all export
B. printPrice must be the default export
C. printPrice must be be a named export
D. printPrice must be a multi exportc

Answer: B

NEW QUESTION # 132
Refer to the following code that imports a module named utils:
import (foo, bar) from '/path/Utils.js';
foo() ;
bar() ;
Which two implementations of Utils.js export foo and bar such that the code above runs without error?
Choose 2 answers

A. const foo = () => { return 'foo';}
const bar = () => {return 'bar'; }
Export default foo, bar;
B. Export default class {
foo() { return 'foo' ; }
bar() { return 'bar' ; }
}
C. // FooUtils.js and BarUtils.js exist
Import (foo) from '/path/FooUtils.js';
Import (boo) from ' /path/NarUtils.js';
D. const foo = () => { return 'foo' ; }
const bar = () => { return 'bar' ; }
export { bar, foo }

Answer: B,D

NEW QUESTION # 133
Refer to the code below:

Line 05 causes an error.
What are the values of greeting and salutation once code completes?

A. Greeting is Hello and salutation is Hello, Hello.
B. Greeting is Hello and salutation is I say hello.
C. Greeting is Goodbye and salutation is Hello, Hello.
D. Greeting is Goodbye and salutation is I say Hello.

Answer: A

NEW QUESTION # 134
......

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