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Salesforce Certified JavaScript Developer I Practice Test - Questions Answers, Page 23

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Question 221

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A developer has the function, shown below, that is called when a page loads. Where can the developer see the log statement after loading the page in the browser?

Question 222

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A developer wants to use a module called DataPrettyPrint. This module exports one default function called printDate (). How can a developer import and use the printDate() function?

Question 223

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After user acceptance testing, the developer is asked to change the webpage background based on user's location. This change was implemented and deployed for testing. The tester reports that the ba

Question 224

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A developer initiates a server with the file server,js and adds dependencies in the source codes package,json that are required to run the server. Which command should the developer run to start th

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Given the expressions var1 and var2, what are two valid ways to return the concatenation of the two expressions and ensure it is string? Choose 2 answers

Refer to the code below: let sayHello = () => { console.log ('Hello, world!'); }; Which code executes sayHello once, two minutes from now?

Refer to the following code: <html lang="en"> <body> <div onclick = "console.log('Outer message') ;"> <button id ="myButton">CLick me<button> </div> </body> <script> function displayMessage(ev) { ev.stopPropagation(); console.log('Inner message.'); } const elem = document.getElementById('myButton'); elem.addEventListener('click' , displayMessage); </script> </html> What will the console show when the button is clicked?

What is the result of the code block?

A developer creates a generic function to log custom messages in the console. To do this, the function below is implemented. 01 function logStatus(status){ 02 console./*Answer goes here*/{'Item status is: %s', status}; 03 } Which three console logging methods allow the use of string substitution in line 02?

GIven a value, which three options can a developer use to detect if the value is NaN? Choose 3 answers !

A developer has the function, shown below, that is called when a page loads. Where can the developer see the log statement after loading the page in the browser?

Given the HTML below: Which statement adds the priority-account CSS class to the Universal Containers row?

A developer needs to debug a Node.js web server because a runtime error keeps occurring at one of the endpoints. The developer wants to test the endpoint on a local machine and make the request against a local server to look at the behavior. In the source code, the server, js file will start the server. the developer wants to debug the Node.js server only using the terminal. Which command can the developer use to open the CLI debugger in their current terminal window?

Refer to HTML below: <div id ="main"> <div id = " card-00">This card is smaller.</div> <div id = "card-01">The width and height of this card is determined by its contents.</div> </div> Which expression outputs the screen width of the element with the ID card-01?

Question 221

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A developer has the function, shown below, that is called when a page loads.

Where can the developer see the log statement after loading the page in the browser?

A.

On the browser JavaScript console

B.

On the terminal console running the web server

C.

In the browser performance tools log

D.

On the webpage console log

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Question 222

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A developer wants to use a module called DataPrettyPrint. This module exports one default function called printDate ().

How can a developer import and use the printDate() function?

A.

B.

C.

D.

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Question 223

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After user acceptance testing, the developer is asked to change the webpage background based on user's location. This change was implemented and deployed for testing.

The tester reports that the background is not changing, however it works as required when viewing on the developer's computer.

Which two actions will help determine accurate results?

Choose 2 answers

A.

The developer should inspect their browser refresh settings.

B.

The tester should disable their browser cache.

C.

The developer should rework the code.

D.

The tester should dear their browser cache.

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Question 224

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A developer initiates a server with the file server,js and adds dependencies in the source codes package,json that are required to run the server.

Which command should the developer run to start the server locally?

A.

start server,js

B.

npm start server,js

C.

npm start

D.

node start

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