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[General] Hottest JS-Dev-101 Certification - Examcollection JS-Dev-101 Dumps Torrent

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【General】 Hottest JS-Dev-101 Certification - Examcollection JS-Dev-101 Dumps Torrent

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Salesforce Certified JavaScript Developer - Multiple Choice Sample Questions (Q195-Q200):NEW QUESTION # 195
At Universal Containers, every team has its own way of copying JavaScript objects. The code Snippet shows an implementation from one team:
Function Person() {
this.firstName = "John";
this.lastName = 'Doe';
This.name =() => (
console.log('Hello $(this.firstName) $(this.firstName)');
)}
Const john = new Person ();
Const dan =JSON.parse(JSON.stringify(john));
dan.firstName ='Dan';
dan.name();
What is the Output of the code execution?
  • A. Hello Dan Doe
  • B. TypeError: Assignment to constant variable.
  • C. Hello John DOe
  • D. TypeError: dan.name is not a function
Answer: D

NEW QUESTION # 196
Which three statements are true about promises ?
Choose 3 answers
  • A. The executor of a new Promise runs automatically.
  • B. A fulfilled or rejected promise will not change states .
  • C. A Promise has a .then() method.
  • D. A pending promise canbecome fulfilled, settled, or rejected.
  • E. A settled promise can become resolved.
Answer: B,C,D

NEW QUESTION # 197
A developer has the following array of student test grades:
Let arr = [ 7, 8, 5, 8, 9 ];
The Teacher wants to double each score and then see an array of the students who scored more than 15 points.
How should thedeveloper implement the request?
  • A. Let arr1 = arr.map((num) => num*2). Filter (( val) => val > 15);
  • B. Let arr1 = arr.filter(( val) => ( return val > 15 )) .map (( num) => ( return num *2 ))
  • C. Let arr1 = arr.map((num) => ( num *2)).filterBy((val) => ( val >15 ));
  • D. Let arr1 = arr.mapBy (( num) => ( return num *2 )) .filterBy (( val ) => return val > 15 )) ;
Answer: A

NEW QUESTION # 198
Refer to code below:
Function muFunction(reassign){
Let x = 1;
var y = 1;
if( reassign ) {
Let x= 2;
Var y = 2;
console.log(x);
console.log(y);}
console.log(x);
console.log(y);}
What is displayed when myFunction(true) is called?
  • A. 2 2 1 2
  • B. 2 2 2 2
  • C. 2 2 1 1
  • D. 2 2 undefined undefined
Answer: A

NEW QUESTION # 199
GIven a value, which three options can a developer use to detect if thevalue is NaN?
Choose 3 answers !
  • A. Object.is(value, NaN)
  • B. value === Number.NaN
  • C. value ! == value
  • D. Number.isNaN(value)
  • E. value == NaN
Answer: D,E

NEW QUESTION # 200
......
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Verify digital signatures of files, of running programs, and of the modules JS-Dev-101 loaded in those programs, An access switch failure is a single point of failure that causes outage for the end devices connected to it.
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