JavaScript-Developer-I Exam Dumps - Salesforce Developer Questions and Answers

Refer to the following code:

01 function Tiger(){

02 this.Type = ‘Cat’;

03 this.size = ‘large’;

04 }

05

06 let tony = new Tiger();

07 tony.roar = () =>{

08 console.log(‘They\’re great1’);

09 };

10

11 function Lion(){

12 this.type = ‘Cat’;

13 this.size = ‘large’;

14 }

15

16 let leo = new Lion();

17 //Insert code here

18 leo.roar();

Which two statements could be inserted at line 17 to enable the function call on line 18?

Choose 2 answers.

Refer to the following code that imports a module named utils:

import (foo, bar) from ‘/path/Utils.js’;

foo() ;

bar() ;

Which two implementations of Utils.js export foo and bar such that the code above runs without

error?

Choose 2 answers

Refer to the code snippet below:

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

For (let i =0; i < array.length; i++)

if (array[i] === 4) {

array.splice(i, 1);

}

}

What is the value of array after the code executes?

Given the following code:

document.body.addEventListener(‘ click ’, (event) => {

if (/* CODE REPLACEMENT HERE */) {

console.log(‘button clicked!’);

)

});

Which replacement for the conditional statement on line 02 allows a developer to

correctly determine that a button on page is clicked?

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 developer creates a simple webpage with an input field. When a user enters text in the input field and clicks the button, the actual value of the field must be displayed in the console.

Here is the HTML file content:

<input type =” text” value=”Hello” name =”input”>

Display The developer wrote the javascript code below:

Const button = document.querySelector(‘button’);

button.addEvenListener(‘click’, () => (

Const input = document.querySelector(‘input’);

console.log(input.getAttribute(‘value’));

When the user clicks the button, the output is always “Hello”.

What needs to be done to make this code work as expected?

Refer to code below:

Let first = ‘who’;

Let second = ‘what’;

Try{

Try{

Throw new error(‘Sad trombone’);

}catch (err){

First =’Why’;

}finally {

Second =’when’;

} catch (err) {

Second =’Where’;

}

What are the values for first and second once the code executes ?

A Developer wrote the following code to test a sum3 function that takes in an array of

numbers and returns the sum of the first three number in the array, The test passes:

Let res = sum2([1, 2, 3 ]) ;

console.assert(res === 6 );

Res = sum3([ 1, 2, 3, 4]);

console.assert(res=== 6);

A different developer made changes to the behavior of sum3 to instead sum all of the numbers

present in the array. The test passes:

Which two results occur when running the test on the updated sum3 function ?

Choose 2 answers

Refer to the code:

Given the code above, which three properties are set for pet1? Choose 3 answers

Refer to the code below:

Let textValue = ’1984’;

Which code assignment shows a correct way to convert this string to an integer?