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Salesforce Certified JavaScript Developer (JS-Dev-101) Sample Questions (Q137-Q142):

NEW QUESTION # 137
Which three statements are true about promises ?
Choose 3 answers

A. A Promise has a .then() method.
B. A settled promise can become resolved.
C. A fulfilled or rejected promise will not change states .
D. The executor of a new Promise runs automatically.
E. A pending promise can become fulfilled, settled, or rejected.

Answer: A,C,E

NEW QUESTION # 138
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: dan.name is not a function
C. TypeError: Assignment to constant variable.
D. Hello John DOe

Answer: B

NEW QUESTION # 139
A developer wants to create an object from a function in the browser using the code below.

What happens due to the lack of the mm keyword on line 02?

A. The m variable is assigned the correct object.
B. The m variable is assigned the correct object but this.name remains undefined.
C. window.m Is assigned the correct object.
D. window.name is assigned to 'hello' and the variable = remains undefined.

Answer: D

NEW QUESTION # 140
Given the following code:

Which replacement for the conditional statement on line 02 allows a developer to correctly determine that a button on the page is clicked?

A. o.nodeTarget == this
B. button.addEventListener ( 'click')
C. Event,target.nodename == 'BUTTON"
D. Event, clicked

Answer: C

NEW QUESTION # 141
Refer to the code below:
function changeValue(param) {
Param =5;
}
Let a =10;
Let b =5;
changeValue(b);
Const result = a+ " - "+ b;
What is the value of result when code executes?

A. 5 -5
B. 5 - 10
C. 10 - 5
D. 10 -10

Answer: D

NEW QUESTION # 142
......

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