Pass the Salesforce Developer JavaScript-Developer-I Questions and answers with ExamsMirror

Refer to the following array:

Let arr1 = [ 1,2, 3, 4, 5 ];

Which two lines of code result in a second array, arr2 being created such that arr2 is not

a reference to arr1?

A developer is setting up a Node,js server and is creating a script at the root of the source code, index,js, that will start the server when executed. The developer declares a variable that needsthe folder location that the code executes from.

Which global variable can be used in the script?

Given the followingcode, what is the value of x?

let x = ‘15' + (10 * 2);

A developer has an is Dog function that takes one argument cat. They want to schedule the function to run every minute.

What is the correct syntax for scheduling this function?

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:

let x = null;

console.log(typeof x);

What is the output?

A team that works on a big project uses npm to deal with projects dependencies.

A developer added a dependency does not get downloaded when they execute npm

install.

Which two reasons could be possible explanations for this?

Choose 2 answers

Refer to the following code:

Let sampleText = ‘The quick brown fox jumps’;

A developer needs to determine if a certainsubstring is part of a string.

Which three expressions return true for the given substring ?

Choose 3 answers

A developer wrote a fizzbuzz function thatwhen passed in a number, returns the

following:

● ‘Fizz’ if the number is divisible by 3.

● ‘Buzz’ if the number is divisible by 5.

● ‘Fizzbuzz’ if the number is divisible by both 3 and 5.

● Empty string if the number is divisible by neither 3 or 5.

Whichtwo test cases will properly test scenarios for the fizzbuzz function?

Choose 2 answers

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?