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Salesforce Certified JavaScript Developer (JS-Dev-101) Sample Questions (Q113-Q118):

NEW QUESTION # 113
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 the developer implement the request?

A. Let arr1 = arr.filter(( val) => ( return val > 15 )) .map (( num) => ( return num *2 ))
B. Let arr1 = arr.map((num) => ( num *2)).filterBy((val) => ( val >15 ));
C. Let arr1 = arr.map((num) => num*2). Filter (( val) => val > 15);
D. Let arr1 = arr.mapBy (( num) => ( return num *2 )) .filterBy (( val ) => return val > 15 )) ;

Answer: C

NEW QUESTION # 114
What are two unique features of functions defined with a fat arrow as compared to normal function definition?
Choose 2 answers

A. The function generated its own this making it useful for separating the function's scope from its enclosing scope.
B. If the function has a single expression in the function body, the expression will be evaluated and implicit returned.
C. The function uses the this from the enclosing scope.
D. The function receives an argument that is always in scope, called parentThis, which is the enclosing lexical scope.

Answer: A,D

NEW QUESTION # 115
Refer to the code below.

After changing the string index values, the of atr is Javascript''. What is the reason for this value?

A. Primitive values are mutable.
B. Non-primitive values are mutable.
C. Non-primitive values are immutable.
D. Primitive values are immutable

Answer: B

NEW QUESTION # 116
A developer has an ErrorMandler module that contains multiple functions.
What kind of export should be leveraged so that multiple function can be used?

A. Named
B. All
C. default
D. Multi

Answer: A

NEW QUESTION # 117
Refer to the HTML below:
<p> The current status of an order: < span> id='' status '> In progress < /span> < /p> Which JavaScript Statement changes the text 'In Progress' to Completed'?

A. Document, getElementById (''status''), innerHTML = 'Completed' ;
B. Document, getElementById (status'') , value = completed' ;
C. Document, getElementById (''# status''), innerHTML = 'Completed' ;
D. Document, getElementById ('',status''), innerHTML = 'Completed' ;

Answer: A

NEW QUESTION # 118
......

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