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BootcampPDF JS-Dev-101 Test Questions Prioritize Your Study Time

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BootcampPDF JS-Dev-101 Test Questions Prioritize Your Study Time

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2026 Latest BootcampPDF JS-Dev-101 PDF Dumps and JS-Dev-101 Exam Engine Free Share: https://drive.google.com/open?id=1kY3DrGPDBbzDJjlDTF6Rpc47lLJ00Pmm
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Salesforce Certified JavaScript Developer - Multiple Choice Sample Questions (Q33-Q38):NEW QUESTION # 33
A developer is wondering whether to use, Promise.then or Promise.catch, especially when a Promise throws an error?
Which two promises are rejected?
Which 2 are correct?
  • A. Promise.reject('cool error here').catch(error => console.error(error));
  • B. Promise.reject('cool errorhere').then(error => console.error(error));
  • C. New Promise(() => (throw 'cool error here'}).then(null, error => console.error(error)));
  • D. New Promise((resolve, reject) => (throw 'cool error here'}).catch(error =>console.error(error)) ;
Answer: A,D

NEW QUESTION # 34
Refer to the code below:
flag();
function flag() {
console.log('flag');
}
const anotherFlag = () => {
console.log('another flag');
}
anotherFlag();
What is result of the code block?
  • A. The console logs 'flag' and then an error is thrown.
  • B. The console logs 'flag' and 'another flag'.
  • C. The console logs only 'flag'.
  • D. An error is thrown.
Answer: B
Explanation:
Comprehensive and Detailed Explanation From Exact Extract JavaScript Knowledge:
Key points:
Function declarations are hoisted (their definitions are available before the line where they appear).
Function expressions assigned to const or let are not hoisted as callable functions, but here anotherFlag is only used after it is defined.
Step-by-step:
flag(); at the top:
flag is a function declaration defined later; due to hoisting, it is available.
It logs 'flag'.
The declaration:
function flag() {
console.log('flag');
}
is already in effect (hoisted before execution).
const anotherFlag = () => { console.log('another flag'); } defines anotherFlag as an arrow function.
anotherFlag(); is called after its definition; this is valid and logs 'another flag'.
No errors occur. The console output is:
flag
another flag
So option D is correct.
Concepts: function hoisting, difference between function declarations and function expressions, execution order.

NEW QUESTION # 35
Refer to the following code:
Let sampleText = 'The quick brown fox jumps';
A developer needs to determine if a certainsubstring is part of a string.
Which three expressions return true for the given substring ?
Choose 3 answers
  • A. sampleText.includes('fox');
  • B. sampleText.includes(' fox ');
  • C. sampleText.includes(' quick ') !== -1;
  • D. sampleText.includes(' Fox ', 3)
  • E. sampleText.includes(' quick ', 4);
Answer: B,C,E

NEW QUESTION # 36
Which option is true about the strict mode in imported modules?
  • A. A developer can only reference notStrict() functions from the imported module.
  • B. Imported modules are in strict mode whether you declare them as such or not.
  • C. Add the statement use non-strict; before any other statements in the module to enable notstrict mode.
  • D. Add the statement use strict = false; before any other statements in the module to enable notstrict mode.
Answer: B
Explanation:
Comprehensive and Detailed Explanation From Exact Extract JavaScript knowledge:
In JavaScript, ES modules (files imported using import / export) have special semantics:
All code inside a module is automatically executed in strict mode.
This is specified by the ECMAScript standard and does not require the explicit "use strict"; directive.
Effects:
You do not need to write "use strict"; at the top of a module file.
You cannot turn strict mode off for module code.
All module top-level code is treated as strict.
Now evaluate each option:
Option A:
Add the statement use non-strict; before any other statements in the module to enable notstrict mode.
There is no use non-strict; directive in JavaScript.
The only directive recognized by engines is "use strict";.
You cannot explicitly enable a "non-strict" mode with such a string.
Option B:
Imported modules are in strict mode whether you declare them as such or not.
This matches the language specification.
ES modules are always in strict mode, automatically.
This is true.
Option C:
Add the statement use strict = false; before any other statements in the module to enable notstrict mode.
use strict = false; is not a directive; it is parsed as a normal expression, and does not affect strict mode.
There is no supported way to disable strict mode in modules.
Option D:
A developer can only reference notStrict() functions from the imported module.
There is no special notStrict() restriction in modules.
Functions exported/imported in modules are simply subject to strict mode rules like the rest of the module's code.
Therefore, the only correct statement is:
Study Guide / Concept Reference (no links):
ES modules (import / export)
Automatic strict mode in modules
"use strict"; directive for scripts vs modules
Inability to disable strict mode in ES module code
________________________________________

NEW QUESTION # 37
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()?
  • A. import DatePrettyPrint from '/path/DatePrettyPrint.js';
    DatePrettyPrint.printDate();
  • B. import DatePrettyPrint() from '/path/DatePrettyPrint.js';
    printDate();
  • C. import printDate from '/path/DatePrettyPrint.js';
    printDate();
  • D. import printDate from '/path/DatePrettyPrint.js';
    DatePrettyPrint.printDate();
Answer: C
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 → imported without braces.
Importing default functions gives a callable function, not an object.
Correct syntax: import identifier from "module".

NEW QUESTION # 38
......
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