QUESTION 13
developer is trying to convince management that their team will benefit from using
Node.js for a backend server that they are going to create. The server will be a web server that
handles API requests from a website that the team has already built using HTML, CSS, and
JavaScript.
Which three benefits of Node.js can the developer use to persuade their manager?
Choose 3 answers:

QUESTION 14
Given the requirement to refactor the code above to JavaScript class format, which class definition is correct?

A)

B)

C)

D)

QUESTION 15
Refer to the following code:

What is returned by the function call on line 13?

QUESTION 16
Why would a developer specify a package.jason as a developed forge instead of a dependency ?

QUESTION 17
Refer to the code below:
for(let number =2 ; number <= 5 ; number += 1 ) {
// insert code statement here
}
The developer needs to insert a code statement in the location shown. The code
statement has these requirements:
1. Does require an import
2. Logs an error when the boolean statement evaluates to false
3. Works in both the browser and Node.js
Which meet the requirements?

QUESTION 18
Which code statement below correctly persists an objects in local Storage ?

QUESTION 19
Refer to the code below:

What is the value of result after line 10 executes?

QUESTION 20
Refer to the code:

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

QUESTION 21
Which two console logs out NaN?
Choose 2 answers

QUESTION 22
Refer to the following code:

Which two statements could be inserted at line 17 to enable the function call on line 18?
Choose 2 answers

QUESTION 23
Refer to the code below?
Let searchString = ‘ look for this ‘;
Which two options remove the whitespace from the beginning of searchString?
Choose 2 answers

QUESTION 24
A developer is setting up a new Node.js server with a client library that is built using events and callbacks.
The library:
Will establish a web socket connection and handle receipt of messages to the server Will be imported with require, and made available with a variable called we.
The developer also wants to add error logging if a connection fails.
Given this info, which code segment shows the correct way to set up a client with two events that listen at execution time?

QUESTION 25
A developer implements and calls the following code when an application state change occurs:

If the back button is clicked after this method is executed, what can a developer expect?

QUESTION 26
Refer to the string below:
const str = ‘Salesforce’;
Which two statements result in the word ‘Sales’?
Choose 2 answers

QUESTION 27
A developer is creating a simple webpage with a button. When a user clicks this button
for the first time, a message is displayed.
The developer wrote the JavaScript code below, but something is missing. The
message gets displayed every time a user clicks the button, instead of just the first time.
01 function listen(event) {
02 alert ( ‘Hey! I am John Doe’) ;
03 button.addEventListener (‘click’, listen);
Which two code lines make this code work as required?
Choose 2 answers

QUESTION 28
Which option is true about the strict mode in imported modules?

QUESTION 29
A developer is wondering whether to use, Promise.then or Promise.catch, especially when a Promise throws an error?
Which two promises are rejected?
Which 2 are correct?

QUESTION 30
Refer to the following code:
Let sampletext = ‘The quick brown fox Jumps’;
A developer need to determine if a certain substring is part of a string.
Which three expressions return true for the give substring? Choose 3 answers

QUESTION 31
Refer to code below:
function Person() {
this.firstName = ‘John’;
}
Person.prototype ={
Job: x => ‘Developer’
};
const myFather = new Person();
const result =myFather.firstName + ‘ ‘ + myFather.job();
What is the value of the result after line 10 executes?

QUESTION 32
A developer is debugging a web server that uses Node.js. The server hits a runtime error every third request to an important endpoint on the web server.
The developer added a break point to the start script, that is at index, js at the root of the server’s source code. The developer wants to make use of Chrome DevTools to debug.
Which command can be run to access DevTools and make sure the breakpoint is hit?

QUESTION 33
A developer is working on an ecommerce website where the delivery date is dynamically calculated based on the current day. The code line below is responsible for this calculation.
Const deliveryDate = new Date ();
Due to changes in the business requirements, the delivery date must now be today’s date + 9 days.
Which code meets this new requirement?

QUESTION 34
A developer has an ErrorHandler module that contains multiple functions.
What kind of export be leverages so that multiple functions can be used?