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| Certification Vendor: | Salesforce |
|---|---|
| Exam Name: | Salesforce Certified JavaScript Developer I |
| Exam Number: | JS-Dev-101 |
| Exam Duration: | 105 minutes |
| Real Exam Qty: | 60 (plus up to 5 unscored pilot questions) |
| Available Languages: | English |
| Exam Price: | $200 USD |
| Certificate Validity Period: | None (Credential does not expire) |
| Related Certifications: | Salesforce Certified JavaScript Developer I Credential |
| Passing Score: | 65% |
| Exam Format: | Multiple-choice, Multiple-select |
| Sample Questions: | Salesforce JavaScript-Developer-I Sample Questions |
| Exam Way: | Online (proctored via Pearson VUE) or On-site (at a Pearson VUE testing center) |
| Pre Condition: | None required. 1-2 years of JavaScript development experience (front-end and/or back-end) is strongly recommended. Note: To earn the full credential, candidates must also pass the Lightning Web Components Specialist Superbadge in addition to the JS-Dev-101 exam. |
| Official Syllabus URL: | https://trailhead.salesforce.com/en/credentials/javascriptdeveloperi |
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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.
Salesforce JavaScript-Developer-I certification exam is designed for developers who have experience in using JavaScript to customize Salesforce applications. Salesforce Certified JavaScript Developer (JS-Dev-101) certification validates a developer's understanding of the core concepts of JavaScript, as well as their ability to apply these concepts to customize Salesforce applications. Salesforce Certified JavaScript Developer (JS-Dev-101) certification exam is ideal for those who have experience in building custom applications on the Salesforce platform and are looking to validate their skills and knowledge.
NEW QUESTION # 25
Refer to the code:
const pi = 3.1415926;
What is the data type of pi?
Answer: C
Explanation:
JavaScript has one numeric data type for all real numbers, whether integers or decimals.
This type is simply called:
Number
It follows the IEEE 754 double-precision floating-point standard internally, but JavaScript does not expose separate types like float, double, or decimal.
Therefore:
* It is not Float # JavaScript does not have float primitives.
* It is not Double # this refers to the underlying IEEE 754 representation, but JavaScript ' s type is still just "Number."
* It is not Decimal # JavaScript has no built-in decimal type.
* The correct answer is Number .
JavaScript Knowledge References (text-only)
* JavaScript has a single numeric type: Number.
* All numbers-integers, fractions, floating point-use the Number type.
NEW QUESTION # 26
A developer has the following array of student test grades:
Let arr - [7, 8, 5, 9]
How should want to double each score and then see an array of the students who scored more than 15 points.
How should the developer implement the request?
Answer: B
NEW QUESTION # 27
A developer is leading the creation of a new web server for their team that will fulfill API requests from an existing client.
The team wants a web server that runs on Node.Js, and they want to use the new web framework Minimalist.Js. The lead developer wants to advocate for a more seasoned back-end framework that already has a community around it.
Which two frameworks could the lead developer advocate for?
Choose 2 answers
Answer: A,D
NEW QUESTION # 28
Given the requirement to refactor the code above to JavaScript class format, which class definition is correct?
A)
B)
C)
D)
Answer: B
NEW QUESTION # 29
let sampleText = " The quick brown fox jumps " ;
Which three expressions return true for a substring?
Answer: A,D,E
Explanation:
The correct answers are A, B, and C .
The original variable name appears to contain a typing error. The variable should be used consistently as sampleText:
let sampleText = " The quick brown fox jumps " ;
A is correct because includes() checks whether a string contains a specific substring and returns a Boolean value:
sampleText.includes( ' fox ' );
Since " fox " exists inside " The quick brown fox jumps " , this returns:
true
B is correct after correcting the typing error. The correct expression is:
sampleText.indexOf( ' quick ' ) > -1;
indexOf() returns the index position where the substring is found. If the substring is not found, it returns -1.
Since " quick " exists in the string, sampleText.indexOf( ' quick ' ) returns a value greater than -1, so the expression returns:
true
C is correct after correcting the missing quotation marks and adding a Boolean comparison:
sampleText.indexOf( ' fox ' ) !== -1;
The substring " fox " exists in the string, so indexOf( ' fox ' ) does not return -1. Therefore, the expression returns:
true
D is incorrect because the method name is typed incorrectly. JavaScript string has includes(), not include().
Incorrect:
sampleText.include( ' fox ' )
Correct:
sampleText.includes( ' fox ' )
E is incorrect because JavaScript string matching is case-sensitive:
sampleText.indexOf( ' Quick ' ) !== -1;
The string contains " quick " with a lowercase q, not " Quick " with an uppercase Q, so this returns:
false
Therefore, the verified answers are A, B, and C .
NEW QUESTION # 30
......
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