30 November, 2024

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Total 157 questions Full Exam Access

Question 1

What are two unique features of functions defined with a fat arrow as compared to normal function definition?
Choose 2 answers

The function generated its own this making ituseful for separating the function’s scope from its enclosing scope.

The function receives an argument that is always in scope, called parentThis, which is the enclosing lexical scop

If the function has a single expression in the function body, the expression will be evaluated and implicit returned.

The function uses the this from the enclosing scope.

Question 2

Refer to the following code:
Let sampleText = ‘The quick brown foxjumps’;
A developer needs to determine if a certain substring is part of a string. Which three expressions return true for the given substring ?
Choose 3 answers

sampleText.includes(‘fox’);

sampleText.includes(‘ quick ’, 4);

sampleText.includes(‘Fox ’, 3)

sampleText.includes(‘ fox ’);

sampleText.includes(‘ quick ’) !== -1;

Question 3

A developer creates a simple webpage with an input field. When a user enters text in the input field and clicks the button, the actual value of the field must be displayed in the console.
Here is the HTML file content:
JavaScript-Developer-I dumps exhibit

The developer wrote the javascript code below:
JavaScript-Developer-I dumps exhibit

When the user clicks the button, the output is always “Hello”. What needs to be done to make this code work as expected?

Replace line 04 with console.log(input .value);

Replace line 03 with const input = document.getElementByName(‘input’);

Replace line 02 with button.addCallback(“click”, function() {

Replace line 02 withbutton.addEventListener(“onclick”, function() {

Question 4

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?

import * from '/path/universalContainersLib.js'; universalContainersLi

foo ()7 universalContainersLib.bar ();

import {foo,bar} from '/path/universalCcontainersLib.js'; foo():bar()?

import all from '/path/universalContainersLib.js'; universalContainersLib.foo(); universalContainersLib.bar ();

import * as lib from '/path/universalContainersLib.js'; lib.foo();li

bar ();

Question 5

Consider type coercion, what does the following expression evaluate to? True + 3 + ‘100’ + null

104

4100

‘3100null’

‘4100null’

Question 6

A Developer wrote the following code to test a sum3 function that takes in an array of numbers and returns the sum of the first three number in the array, The test passes:
JavaScript-Developer-I dumps exhibit

A different developer made changes to the behavior of sum3 to instead sum all of the numbers present in the array. The test passes:
Which two results occur when running the test on the updated sum3 function ? Choose 2 answers

The line 02 assertion passes.

The line 02 assertion fails

The line 05 assertion passes.

The line 05 assertion fails.

Question 7

Refer to code below:
Let productSKU = ‘8675309’ ;
A developer has a requirement to generate SKU numbers that are always 19 characters lon, starting with ‘sku’,and padded with zeros.
Which statement assigns the values sku0000000008675309 ?

productSKU = productSKU .padStart (19. ‘0’).padstart(‘sku’);

productSKU = productSKU .padEnd (16. ‘0’).padstart(‘sku’);

productSKU = productSKU .padEnd (16. ‘0’).padstart(19, ‘sku’);

productSKU = productSKU .padStart (16. ‘0’).padstart(19, ‘sku’);

Question 8

Refer to HTML below:

The current status of an Order: In Progress

.
Which JavaScript statement changes the text ‘In Progress’ to ‘Completed’ ?

document.getElementById(“status”).Value = ’Completed’ ;

document.getElementById(“#status”).innerHTML = ’Completed’ ;

document.getElementById(“status”).innerHTML = ’Completed’ ;

document.getElementById(“.status”).innerHTML = ’Completed’ ;

Question 9

A developer writers the code below to calculate the factorial of a given number.
JavaScript-Developer-I dumps exhibit

What isthe result of executing line 04?

-Infinity

RuntimeError

Question 10

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 turn around 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?

DEBUG = http, https node server.js

NODE_DEBUG =http, https node server.js

DEBUG =true node server.js

NODE_DEBUG =true node server.js

Question 11

A developer is debugging a web server that uses Node.js The server hits a runtimeerror 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 he 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 breakdown is hit ?

node -i index.js

Node --inspect-brk index.js

Node inspect index.js

Node --inspect index.js

Question 12

Which two console logs output NaN? Choose 2 answers | |

console.log(10 / Number('5) ) ;

console.log(parseInt ' ("two')) ;

console.log(10 / 0);

console.loeg(10 / 'five');

Question 13

developer wants to use a module nameduniversalContainersLib and them call functions from it.
How should a developer import every function from the module and then call the fuctions foo and bar ?

import * ad lib from ‘/path/universalContainersLib.js’; lib.foo();lib.bar();

import (foo, bar) from ‘/path/universalContainersLib.js’; foo();bar();

import all from ‘/path/universalContaineraLib.js’; universalContainersLib.foo(); universalContainersLib.bar();

import * from ‘/path/universalContaineraLib.js’; universalContainersLib.foo(); universalContainersLib.bar();

Question 14

Refer to code below: console.log(0);
setTimeout(() => ( console.log(1);
});
console.log(2); setTimeout(() => { console.log(3);
), 0);
console.log(4);
In which sequence will the numbers be logged?

01234

02431

02413

13024

Question 15

Given the code below:
JavaScript-Developer-I dumps exhibit

What should a developer insert at line 15 to output the following message using the method ?
> SNEGeneziz is loading a cartridgegame: Super Monic 3x Force . . .

Console16bit.prototype.load(gamename) = function() {

Console16bit.prototype.load = function(gamename) {

Console16bit = Object.create(GameConsole.prototype).load = function (gamename) {

Console16bit.prototype.load(gamename) {

Page: 1 / 13

Total 157 questions Full Exam Access