100% Pass Top-selling JavaScript-Developer-I Exams - New 2023 Salesforce Pratice Exam [Q88-Q110]

100% Pass Top-selling JavaScript-Developer-I Exams - New 2023 Salesforce Pratice Exam

Salesforce Developer Dumps JavaScript-Developer-I Exam for Full Questions - Exam Study Guide

NEW QUESTION 88
Given the following code, what is the value of x?
let x = '15' + (10 * 2);

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

Answer: C

NEW QUESTION 89
Given the code below:

What is the expected output?

A. Line 08 outputs the variable, but line 09 throws an error.
B. Line 08 throws an error, therefore line 09 is never executed.
C. Both lines 06 and 09 are executed, but the values outputted are undefined.
D. Both lines 08 and 09 are executed, and the variables are outputted.

Answer: A

NEW QUESTION 90
Which option is a core Node,js module?

A. Path
B. locate
C. Ios
D. Memory

Answer: A

NEW QUESTION 91
A developer tries to retrieve all cookies, then sets a certain key value pair in the cookie. These statements are used:

What is the behavior?

A. Cookies are read and the key value is set, and all cookies are wiped.
B. A Cookies are read and the key value is set, the remaining cookies are unaffected.
C. Cookies are read, but the key value is not set because the value is not URL encoded.
D. Cookies are not read because line 01 should be document, cookies, but the key value is set and all cookies are wiped.

Answer: B

NEW QUESTION 92
A developer needs to test this functions:

Which two assert statements are valid tests for this function?

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

Answer: A,D

NEW QUESTION 93
Which code statement below correctly persists an objects in local Storage ?

A. const setLocalStorage = (storageKey, jsObject) => {
window.localStorage.persist(storageKey, jsObject);
}
B. const setLocalStorage = ( jsObject) => {
window.localStorage.setItem(jsObject);
}
C. const setLocalStorage = ( jsObject) => {
window.localStorage.connectObject(jsObject));
}
D. const setLocalStorage = (storageKey, jsObject) => {
window.localStorage.setItem(storageKey, JSON.stringify(jsObject));
}

Answer: D

NEW QUESTION 94
Refer to the code:

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

A. Name
B. Type
C. canTalk
D. Owner
E. Size

Answer: B,C,E

NEW QUESTION 95
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?

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

Answer: C

Explanation:
} catch(error) { console.log('ERROR' , error); };
}

NEW QUESTION 96
Which code statement correctly retrieves and returns an object from localStorage?

A. const retrieveFromLocalStorage = () =>{
return JSON.stringify(window.localStorage.getItem(storageKey));
}
B. const retrieveFromLocalStorage = (storageKey) =>{
return window.localStorage.getItem(storageKey);
}
C. const retrieveFromLocalStorage = (storageKey) =>{
return JSON.parse(window.localStorage.getItem(storageKey));
}
D. const retrieveFromLocalStorage = (storageKey) =>{
return window.localStorage[storageKey];
}

Answer: C

NEW QUESTION 97
Given the code below:
01 function GameConsole (name) {
02 this.name = name;
03 }
04
05 GameConsole.prototype.load = function(gamename) {
06 console.log( ` $(this.name) is loading a game : $(gamename) ...`);
07 )
08 function Console 16 Bit (name) {
09 GameConsole.call(this, name) ;
10 }
11 Console16bit.prototype = Object.create ( GameConsole.prototype) ;
12 //insert code here
13 console.log( ` $(this.name) is loading a cartridge game : $(gamename) ...`);
14 }
15 const console16bit = new Console16bit(' SNEGeneziz ');
16 console16bit.load(' Super Nonic 3x Force ');
What should a developer insert at line 15 to output the following message using the method ?
> SNEGeneziz is loading a cartridge game: Super Monic 3x Force . . .

A. Console16bit.prototype.load(gamename) = function() {
B. Console16bit.prototype.load(gamename) {
C. Console16bit.prototype.load = function(gamename) {
D. Console16bit = Object.create(GameConsole.prototype).load = function
(gamename) {

Answer: C

NEW QUESTION 98
Which three browser specific APIs are available for developer to persist data between page loads?
Choose 3 answers

A. indexedDB
B. global variables
C. IIFEs
D. localStorage
E. cookies

Answer: A,C,D

NEW QUESTION 99
Refer to the code below:
Const searchTest = 'Yay! Salesforce is amazing!" ;
Let result1 = searchText.search(/sales/i);
Let result 21 = searchText.search(/sales/i);
console.log(result1);
console.log(result2);
After running this code, which result is displayed on the console?

A. > 5 > -1
B. > 5 > 0
C. > 5 >undefined
D. > true > false

Answer: C

Explanation:

NEW QUESTION 100
Given the code below:

Which method can be provide a visual representation of the list if users and to allow sorting by the name or email attributes.

A. Console,table (userslist);
B. Console.group (userList);
C. Console.groupCollapsed (userslist);
D. Console.info (userlist);

Answer: B

NEW QUESTION 101
developer removes the HTML class attribute from the checkout button, so now it is
simply:
<button>Checkout</button>.
There is a test to verify the existence of the checkout button, however it looks for a button with
class= "blue". The test fails because no such button is found.
Which type of test category describes this test?

A. False positive
B. False negative
C. True negative
D. True positive

Answer: B

NEW QUESTION 102
There is a new requirement for a developer to implement a currPrice method that will return the current price of the item or sales..

What is the output when executing the code above

A. 50
80
Uncaught Reference Error:this,discount is undefined
72
B. 50
80
72
C. 50
Uncaught TypeError: saleItem,desrcription is not a function
50
80
D. 50
80
50
72

Answer: D

NEW QUESTION 103
Refer to the following code that imports a module named Utills,
Which two implementations of Utill, je export foo and bar such that the code above runs without error?
Choose 2 answers

A. Export default class (
Foo ( ) ( return 'foo ,; )
Bar ( ) ( return ;bar ; )
B. //FooUtill.js and barUtils, js exist
Import (foo) from ,/Path/footUtils.js,:
Export (foo, bar)
C. Const foo = () => ( return 'foo ' ; )
Const bar => ( return 'bar' ; )
Export (foo, bar)
D. Const foo = ( ) => ( return 'foo; ; )
Const bar => => { return 'bar ';}
Export default foo, bar;

Answer: A

NEW QUESTION 104
Refer to the code below:
01 const exec = (item, delay) =>{
02 new Promise(resolve => setTimeout( () => resolve(item), delay)),
03 async function runParallel() {
04 Const (result1, result2, result3) = await Promise.all{
05 [exec ('x', '100') , exec('y', 500), exec('z', '100')]
06 );
07 return `parallel is done: $(result1) $(result2)$(result3)`;
08 }
}
}
Which two statements correctly execute the runParallel () function?
Choose 2 answers

A. runParallel () .then(data);
B. runParallel () .then(function(data)
return data
C. runParallel ( ). done(function(data){
return data;
});
D. Async runParallel () .then(data);

Answer: B,C

NEW QUESTION 105
Refer to the following code that performs a basic mathematical operation on a provided
input:
function calculate(num) {
Return (num +10) / 3;
}
How should line 02 be written to ensure that x evaluates to 6 in the line below?
Let x = calculate (8);

A. Return Number((num +10) /3 );
B. Return (Number (num +10 ) / 3;
C. Return Number(num + 10) / 3;
D. Return Integer(num +10) /3;

Answer: B

NEW QUESTION 106
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?

A. [1, 2, 3, 4, 5, 4]
B. [1, 2, 3, 4, 4, 5, 4]
C. [1, 2, 3, 4, 5, 4, 4]
D. [1, 2, 3, 5]

Answer: B

Explanation:

NEW QUESTION 107
A developer wants to use a module named universalContainerLib 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/universalContainerLib.js''
universalContainersLib.foo( ) ;
universalContainersLib bar ( ) :
B. import all from '/path/universalContainerLib.js''
universalContainersLib.foo( ) ;
universalContainersLib bar ( ) :
C. import (foo,bar) from '/path/universalContainerLib.js''
foo ( ) ;
bar ( ) ;
D. import - as lib from '/path/universalContainerLib.js''
lib.foo( ) ;
lib. bar ( ) ;

Answer: D

NEW QUESTION 108
A team that works on a big project uses npm to deal with projects dependencies.
A developer added a dependency does not get downloaded when they execute npm
install.
Which two reasons could be possible explanations for this?
Choose 2 answers

A. The developer missed the option --add when adding the dependency.
B. The developer added the dependency as a dev dependency, and
NODE_ENV is set to production.
C. The developer added the dependency as a dev dependency, and
NODE_ENV
Is set to production.
D. The developer missed the option --save when adding the dependency.

Answer: B,C,D

NEW QUESTION 109
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)