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| Certification Vendor: | Salesforce |
|---|---|
| Exam Name: | Salesforce Certified JavaScript Developer I - Multiple Choice Exam (JS-Dev-101) |
| Exam Number: | JS-Dev-101 |
| Certificate Validity Period: | 1 year (maintenance required annually in Salesforce certification program) |
| Real Exam Qty: | 60 (multiple choice) |
| Available Languages: | English |
| Exam Price: | $200 USD |
| Passing Score: | 65% |
| Related Certifications: | Salesforce Platform Developer I Salesforce Platform Developer II |
| Exam Duration: | 105 minutes |
| Exam Format: | Multiple Choice Questions, Multiple Select Questions |
| Recommended Training: | Salesforce Trailhead - JavaScript Developer I MDN Web Docs - JavaScript Guide |
| Exam Registration: | Salesforce Certification Registration Kryterion Webassessor (Exam Delivery) |
| Sample Questions: | Salesforce JS-Dev-101 Sample Questions |
| Exam Way: | Online proctored exam via Salesforce authorized testing platform (e.g., Webassessor) |
| Pre Condition: | No formal prerequisites, but familiarity with JavaScript and web development is recommended. |
| Official Syllabus URL: | https://trailhead.salesforce.com/credentials/javascriptdeveloper |
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NEW QUESTION # 110
Consider type coercion, what does the following expression evaluate to?
True + 3 + '100' + null
Answer: B
NEW QUESTION # 111
A developer wants to use a module called DatePrettyPrint.
This module exports one default function called printDate().
How can the developer import and use printDate()?
Answer: D
Explanation:
________________________________________
Comprehensive and Detailed Explanation From Exact Extract JavaScript Knowledge ES Modules follow these rules:
Default exports are imported using:
import anyName from 'module'
The name chosen in the import does NOT need to match the exported name.
If a module exports:
export default function printDate() {}
then consuming code should import the function directly:
import printDate from '/path/DatePrettyPrint.js';
To execute it:
printDate();
Option analysis:
A incorrect:
import DatePrettyPrint() is invalid syntax.
Also calling printDate() without importing it is incorrect.
B incorrect:
A default export imported as DatePrettyPrint gives the function itself, not an object containing methods.
You cannot call DatePrettyPrint.printDate().
C incorrect:
Imports printDate but then calls DatePrettyPrint.printDate(), which does not exist.
D correct:
Correct import of a default-exported function.
Correct direct invocation.
________________________________________
JavaScript Knowledge Reference (text-only)
Default export โ imported without braces.
Importing default functions gives a callable function, not an object.
Correct syntax: import identifier from "module".
NEW QUESTION # 112
Considering the implications of 'use strict' on line 04, which three statements describe the execution of the code?
Choose 3 answers
Answer: C,D,E
NEW QUESTION # 113
Considering type coercion, what does the following expression evaluate to?
true + '13' + NaN
Answer: A
Explanation:
Expression:
true + '13' + NaN
The + operator is left-associative, so evaluation order:
true + '13'
When one operand is a string, + performs string concatenation.
true is converted to string 'true'.
'true' + '13' โ 'true13'.
Result from step 1 with NaN:
'true13' + NaN
Again, one operand is a string, so concatenation.
NaN is converted to string 'NaN'.
'true13' + 'NaN' โ 'true13NaN'.
Final value: 'true13NaN'.
So A is correct.
Why others are wrong:
B: '113NaN' would require true to coerce to 1 first and no string to be present, which is not the case because '13' forces string concatenation.
C: 14 would require pure numeric addition, which is not the case once a string is involved.
D: 'true13' ignores the final + NaN part.
Concepts: type coercion with +, boolean to string, NaN to string, left-associative evaluation.
NEW QUESTION # 114
The developer wants to test the array shown:
const arr = Array(5).fill(0)
Which two tests are the most accurate for this array ?
Choose 2 answers:
Answer: A,B
NEW QUESTION # 115
......
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