Quickly and Easily Pass Salesforce Exam with JavaScript-Developer-I real Dumps Updated on Feb-2023 [Q10-Q27]

NO.10 Refer to the following code block:

What is the console output?

NO.11 developer wants to use a module named universalContainersLib and them call functions from it.
How should a developer import every function from the module and then call the fuctions foo and bar ?

NO.12 developer creates a new web server that uses Node.js. It imports a server library that
uses events and callbacks for handling server functionality.
The server library is imported with require and is made available to the code by a
variable named server. The developer wants to log any issues that the server has while booting
up.
Given the code and the information the developer has, which code logs an error at boost
with an event?

NO.13 Considering type coercion, What does the following expression evaluate to?
True + ) + ‘100 ‘ + null

NO.14 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 ws.
The developer also wants to add error logging if a connection fails.
Given this information, which code segment show the correct way to set up a client two events that listen at execution time?
A)

B)

C)

D)

NO.15 Refer to the code below:

What is the value of result after line 10 executes?

NO.16 Refer to the HTML below:

Which JavaScript statement results in changing ”Tony” to ”Mr. T. ”?

NO.17 A developer wrote the following code:
01 let X = object.value;
02
03 try {
04 handleObjectValue(X);
05 } catch (error) {
06 handleError(error);
07 }
The developer has a getNextValue function to execute after handleObjectValue(), but does not want to execute getNextValue() if an error occurs.
How can the developer change the code to ensure this behavior?

NO.18 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?

NO.19 A developer is leading the creating of a new browser application that will server a single page application. The team wants to use a new web framework Minialist.js. The lead developer wants to advocate for a more seasoned wen framework that already has a community around it.
Which two frameworks should the load developer advocate for?

NO.20 Refer to the code:

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

NO.21 Refer to code below:
Function muFunction(reassign){
Let x = 1;
var y = 1;
if( reassign ) {
Let x= 2;
Var y = 2;
console.log(x);
console.log(y);}
console.log(x);
console.log(y);}
What is displayed when myFunction(true) is called?

NO.22 Refer to the code declarations below:

Which three expressions return the string JavaScript?
Choose 3 answers

NO.23 A developer is trying to handle an error within a function.
Which code segment shows the correct approach to handle an error without propagating it elsewhere?
A)

B)

C)

D)

NO.24 Which two console logs out NaN?
Choose 2 answers

NO.25 Given the code below:
const copy = JSON.stringify([ new String(‘ false ‘), new Bollean( false ), undefined ]);
What is the value of copy?

NO.26 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?

NO.27 Refer to the following code: