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Salesforce Certified JavaScript Developer I Exam Sample Questions (Q176-Q181):

NEW QUESTION # 176
A developer implements a function that adds a few values.

Which three options can the developer invoke for this function to get a return vale of 10? Choose 3 answers

A. Sum () (10)
B. Sum (5) (5)
C. Sum (10) ()
D. Sum (5, 5) ()
E. Sum () (5, 5)

Answer: A,B,E

NEW QUESTION # 177
Refer to the code below:

Considering that JavaScript is single-threaded, what is the output of line 08 after the code executes?

A. 0
B. 1
C. 2
D. 3

Answer: B

NEW QUESTION # 178
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 theserver 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?

A. ws.connect (( ) => {console.log('connected to client'); }).catch((error) => { console.log('ERROR' , error); }};
B. ws.on ('connect', ( ) => {console.log('connected to client'); ws.on('error', (error) => { console.log('ERROR' ,error); });});
C. ws.on ('connect', ( ) => { console.log('connected to client'); }}; ws.on('error', (error) => { console.log('ERROR' , error); }};
D. try{ws.connect (( ) => {console.log('connected to client'); });} catch(error) { console.log('ERROR',error); };}

Answer: B

NEW QUESTION # 179
A developer wants to use a module named universalContainersLib and then call functions from it.
How should a developer import every function from the module and then call the functions foo and bar?

A. import * from '/path/universalContainersLib.js';
universalContainersLib. foo ()7
universalContainersLib.bar ();
B. import {foo,bar} from '/path/universalCcontainersLib.js';
foo():
bar()?
C. import all from '/path/universalContainersLib.js';
universalContainersLib.foo();
universalContainersLib.bar ();
D. import * as lib from '/path/universalContainersLib.js';
lib.foo();
lib. bar ();

Answer: D

NEW QUESTION # 180
Given code below:
setTimeout (() => (
console.log(1);
). 0);
console.log(2);
New Promise ((resolve, reject )) = > (
setTimeout(() => (
reject(console.log(3));
). 1000);
)).catch(() => (
console.log(4);
));
console.log(5);
What is logged to the console?

A. 1 2 5 3 4
B. 1 2 4 3 5
C. 2 1 4 3 5
D. 2 5 1 3 4

Answer: D

NEW QUESTION # 181
......

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Questions JavaScript-Developer-I Pdf, JavaScript-Developer-I New Study Materials

JavaScript-Developer-I New Study Materials, Reliable JavaScript-Developer-I Exam Registration

Salesforce Certified JavaScript Developer I Exam Sample Questions (Q176-Q181):

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