Latest Salesforce JavaScript-Developer-I Exam Answers & JavaScript-Developer-I Test Dump

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Salesforce JavaScript-Developer-I Exam Syllabus Topics:

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

>> Latest Salesforce JavaScript-Developer-I Exam Answers <<

JavaScript-Developer-I Test Dump - JavaScript-Developer-I Clear Exam

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Salesforce Certified JavaScript Developer (JS-Dev-101) Sample Questions (Q49-Q54):

NEW QUESTION # 49
Refer to the code below:

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

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

Answer: B

NEW QUESTION # 50
Refer to following code:
class Vehicle {
constructor(plate) {
This.plate =plate;
}
}
Class Truck extends Vehicle {
constructor(plate, weight) {
//Missing code
This.weight = weight;
}
displayWeight() {
console.log('The truck ${this.plate} has a weight of ${this.weight} lb.');}}
Let myTruck = new Truck('123AB', 5000);
myTruck.displayWeight();
Which statement should be added to line 09 for the code to display 'The truck 123AB has a
weight of 5000lb.'?

A. Vehicle.plate = plate;
B. Super.plate =plate;
C. This.plate =plate;
D. super(plate);

Answer: D

NEW QUESTION # 51
const str = ' Salesforce ' ;
Which two statements result in the word " Sales " ?

A. str.substring(0, 5);
B. str.substring(0, 5);
C. str.substr(0, 5);
D. str.substr(s, 5);

Answer: A,C

Explanation:
Comprehensive and Detailed Explanation:
* " Salesforce " indices: S(0) a(1) l(2) e(3) s(4) f(5) ...
A / C (substring(0, 5)):
* substring(start, end) returns characters from start up to but not including end.
* str.substring(0, 5) # characters at indices 0,1,2,3,4 # " Sales " .
D (substr(0, 5)):
* substr(start, length) returns length characters starting at start.
* str.substr(0, 5) # 5 chars from index 0 # " Sales " .
B is invalid because s is not defined; it should be 0. So the two correct statements are A and D.

NEW QUESTION # 52
A developer creates a generic function to log custom messages In the console. To do this, the function below is implemented.

Which three console logging methods allow the use of string substitution in line 02?
Choose 3 answers

A. Info
B. Assert
C. Log
D. error
E. Message

Answer: B,D,E

NEW QUESTION # 53
Refer to the following array:
Let arr1 = [ 1, 2, 3, 4, 5 ];

Which two lines of code result in a second array, arr2 being created such that arr2 is not
a reference to arr1?

A. Let arr2 = arr1.sort();
B. Let arr2 = arr1.slice(0, 5);
C. Let arr2 = arr1;
D. Let arr2 = Array.from(arr1);

Answer: B,D

NEW QUESTION # 54
......

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