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Salesforce JavaScript-Developer-I certification exam is a multiple-choice exam that tests a developer's ability to use JavaScript to implement business logic and user interfaces in Salesforce applications. JavaScript-Developer-I exam consists of 60 questions and has a time limit of 105 minutes. To pass the exam, a developer must score at least 68% overall. JavaScript-Developer-I Exam covers a range of topics, including fundamentals of JavaScript, Apex and Visualforce, and the Lightning Component Framework. In addition to validating a developer's skills and knowledge, the Salesforce JavaScript-Developer-I certification can also help developers advance their careers and increase their earning potential.
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Salesforce JavaScript-Developer-I Exam is a test that measures a candidate’s knowledge and skills in developing JavaScript applications on the Salesforce platform. Passing JavaScript-Developer-I exam is the first step in becoming a certified Salesforce JavaScript Developer I. Salesforce Certified JavaScript Developer (JS-Dev-101) certification is recognized globally and serves as a validation of a person’s expertise in developing custom applications that integrate with Salesforce.
To pass the Salesforce Certified JavaScript Developer I exam, candidates need to have a sound understanding of JavaScript programming language and its applications in the Salesforce platform. JavaScript-Developer-I Exam consists of 60 multiple-choice questions and requires a passing score of 68%. JavaScript-Developer-I exam can be taken online, and the candidates have 105 minutes to complete it.
NEW QUESTION # 139
Corrected code:
let a = " * " ;
let b = " ** " ;
// x = 3;
console.log(a);
What is displayed when the code executes?
Answer: D
Explanation:
The correct answer is B because variable a is declared and initialized before it is printed.
let a = " * " ;
This creates a block-scoped variable named a and assigns it the string value:
" * "
The line:
// x = 3;
is a comment. JavaScript ignores comments during execution, so this line has no effect.
Then this line runs:
console.log(a);
Since a already exists and contains " * " , the console displays:
* Option A is incorrect because a is defined.
Option C is incorrect because a has an assigned value, so it is not undefined.
Option D is incorrect because a was never assigned null.
Therefore, the verified answer is B .
NEW QUESTION # 140
A developer copied a JavaScript object:
01 function Person() {
02 this.firstName = " John " ;
03 this.lastName = " Doe " ;
04 this.name = () = > `${this.firstName},${this.lastName}`;
05 }
06
07 const john = new Person();
08 const dan = Object.assign({}, john);
09 dan.firstName = ' Dan ' ;
How does the developer access dan ' s firstName, lastName?
Answer: C
Explanation:
* Person instances have:
* firstName and lastName as string properties.
* A name method that returns a combined string: `${this.firstName},${this.lastName}`.
* Object.assign({}, john) creates a shallow copy of john into a new object, dan.
After:
dan.firstName = ' Dan ' ;
* dan.name() returns " Dan,Doe " .
Analysis of options:
* A: dan.firstName() and dan.lastName() are function calls , but firstName/lastName are strings, not functions # TypeError.
* B: Calls the defined method and uses both names correctly.
* C: dan.name is a function reference; you'd still need to call it: dan.name().
* D: dan.firstName + dan.lastName is " DanDoe " , no separator. It accesses the properties but not in the method the developer defined.
The intended way, using the provided API, is dan.name().
NEW QUESTION # 141
Universal Containers (UC) just launched anew landing page, but users complain that the website is slow. A developer found some functions any that might cause this problem. To verify this, the developer decides to execute everything and log the time each of these three suspicious functions consumes.
Which function can the developer use to obtain the time spent by every one of the three functions?
Answer: B
NEW QUESTION # 142
A developer creates a class that represents a blog post based on the requirements that a Post should have a body, author, and view count. The code is shown below:
Which statement should be inserted in the placeholder on line 02 to allow for a variable to be sent to a new instance of a port with the three attributes correctly populated?
Answer: A
NEW QUESTION # 143
A developer executes:
document.cookie;
document.cookie = ' key=John Smith ' ;
What is the behavior?
Answer: C
NEW QUESTION # 144
......
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