Free Salesforce Javascript-Developer-I Exam Questions

Become Salesforce Certified with updated Javascript-Developer-I exam questions and correct answers

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Total 217 Questions | Updated On: Feb 18, 2025

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Question 1

Refer to the following array:

Let arr = [1, 2, 3, 4, 5];

Which three options result in x evaluating as [1, 2]?

Choose 3 answer

A : t x = arr. slice (2);

B : t x = arr. slice (0, 2);

C : t x arr.filter((a) => (return a <= 2 });

D : t x = arr.filter ((a) => 2 }) ;

E : t x =arr.splice(0, 2);

Answer: A,B,C

Question 2

Given the code below:

const copy = JSON.stringify([ new String(' false '), new Bollean( false ), undefined ]);

What is the value of copy?

A : -- [ \''false\'' , { } ]--

B : -- [ false, { } ]--

C : -- [ \''false\'' , false, undefined ]--

D : -- [ \''false\'' ,false, null ]--

Answer: D

Question 3

Refer to the following code:

class Vehicle{

constructor(plate){

this.plate = plate;

}

class Truck extends Vehicle{

constructor(plate, weight){

//Missing code

this.weight = weight;

}

displayWeight(){

console.log(`The truck ${this.plate} has a weight of ${this.weight}lb.`);

}

}let myTruck = new Truck('123Ab',5000);

myTruck.displayWeight();

Which statement should be added to missing code for the code to display 'The truck 123AB has a

weight of 5000lb.

A : per(plate)

B : per.plate = plate

C : hicle.plate = plate

D : is.plate = plate

Answer: A

Question 4

Considering type coercion, what does the following expression evaluate to?

True + '13' + NaN

A : ' 113Nan '

B : 14

C : ' true13 '

D : ' true13NaN '

Answer: D

Question 5

Refer to the expression below:

Let x = ('1' + 2) == (6 * 2);

How should this expression be modified to ensure that evaluates to false?

A : t x = ('1' + ' 2') == ( 6 * 2);

B : t x = ('1' + 2) == ( 6 * 2);

C : t x = (1 + 2) == ( '6' / 2);

D : t x = (1 + 2 ) == ( 6 / 2);

Answer: B

Page: 1 / 44

Total 217 Questions | Updated On: Feb 18, 2025

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