CRT-600 by Salesforce Valid Free Exam Practice Test

Question 1

A developer has a web server running with Node.js. The command to start the web server is node server.js. The web server started having latency issues. Instead of a one second turnaround for web requests, the developer now sees a five second turnaround.
Which command can the web developer run to see what the module is doing during the latency period?

A. NODE_DEBUG=http,https node server.js B. DEBUG=true node server.js C. NODE_DEBUG=true node server.js D. DEBUG=http, https node server.js

Correct Answer: B

Question 2

In the browser, the window object is often used to assign variables that require the broadest scope in an application Node.js application does not have access to the window object by default.
Which two methods are used to address this ?
Choose 2 answers

A. Use the document object instead of the window object. B. Assign variables to the global object. C. Create a new window object in the root file. D. Assign variables to module.exports and require them as needed.

Correct Answer: B

Question 3

A developer needs to test this function:
01 const sum3 = (arr) => (
02 if (!arr.length) return 0,
03 if (arr.length === 1) return arr[0],
04 if (arr.length === 2) return arr[0] + arr[1],
05 return arr[0] + arr[1] + arr[2],
06 );
Which two assert statements are valid tests for the function?
Choose 2 answers

A. console.assert(sum3(1, '2')) == 12); B. console.assert(sum3(0)) == 0); C. console.assert(sum3(-3, 2 )) == -1); D. console.assert(sum3('hello', 2, 3, 4)) === NaN);

Correct Answer: A,C

Question 4

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. Let arr2 = arr1; B. Let arr2 = Array.from(arr1); C. Let arr2 = arr1.slice(0, 5); D. Let arr2 = arr1.sort();

Correct Answer: B,C

Question 5

A developer at Universal Containers is creating their new landing page based on HTML, CSS, and JavaScript.
To ensure that visitors have a good experience, a script named personalizeWebsiteContent needs to be executed when the webpage is fully loaded (HTML content and all related files), in order to do some custom initializations.
Which implementation should be used to call Fe:s:-a;::eHec5;te::.-.ter.: based on the business requirement above?

A. Add a handler to the personalizeWebsiteContent script to handle the DOMContentLoaded event B. Add a listener to the window object to handle the lead event C. Add a handler to the personalizeWebsiteContent script to handle the load event D. Add a listener to the window object to handle the DOMContentLoaded event

Correct Answer: B

Question 6

Refer to the code below:

What is the result when the Promise in the execute function is rejected?

A. Rejected B. Rejected1 Rejected2 Rejected3 Rejected Rejected Rejected4 C. Resolved1 Resolved2 Resolved3 Resolved4 D. Rejected Resolved

Correct Answer: D

Question 7

Given the code below:

Which method can be used to provide a visual representation of the list of users and to allow sorting by the name or email attribute?

A. console.info(usersList) ; B. console.table(usersList) ; C. console.group(usersList) ; D. console.groupCol lapsed (usersList) ;

Correct Answer: C

Question 8

Given the code below:
Function myFunction(){
A =5;
Var b =1;
}
myFunction();
console.log(a);
console.log(b);
What is the expected output?

A. Both lines 08 and 09 are executed, but values outputted are undefined. B. Line 08 thrones an error, therefore line 09 is never executed. C. Line 08 outputs the variable, but line 09 throws an error. D. Both lines 08 and 09 are executed, and the variables are outputted.

Correct Answer: C

Question 9

Refer to the expression below:
Let x = ('1' + 2) == (6 * 2);
How should this expression be modified to ensure that evaluates to false?

A. Let x = ('1' + 2) == ( 6 * 2); B. Let x = (1 + 2 ) == ( 6 / 2); C. Let x = (1 + 2) == ( '6' / 2); D. Let x = ('1' + ' 2') == ( 6 * 2);

Correct Answer: A

Question 10

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

A. Add the statement use strict =false; before any other statements in the module to enable not- strict mode. B. Add the statement use non-strict, before any other statements in the module to enable not-strict mode. C. Imported modules are in strict mode whether you declare them as such or not. D. You can only reference notStrict() functions from the imported module.

Correct Answer: D

Salesforce Certified JavaScript Developer I - CRT-600 Exam Practice Test