Download Latest JavaScript-Developer-I Dumps with Authentic Real Exam QA's [Q115-Q132] : IT Certification Exam Braindumps : http://blog.braindumpsit.com

NEW QUESTION 115
Given the following code:

is the output of line 02?

”x”

”null”’

”object”

”undefined”

NEW QUESTION 116
Which code statement below correctly persists an objects in local Storage ?

const setLocalStorage = (storageKey, jsObject) => {
window.localStorage.setItem(storageKey, JSON.stringify(jsObject));
}

const setLocalStorage = ( jsObject) => {
window.localStorage.connectObject(jsObject));
}

const setLocalStorage = ( jsObject) => {
window.localStorage.setItem(jsObject);
}

const setLocalStorage = (storageKey, jsObject) => {
window.localStorage.persist(storageKey, jsObject);
}

NEW QUESTION 117
A class was written to represent items for purchase in an online store, and a second class representing items that are on sale at a discounted price. The constructor sets the name to the first value passed in. The pseudocode is below:

There is a new requirement for a developer to implement a description method that will retrun a brief description for item and saleitem.

What is the out when executing the code above?

This is a Scarf
Unicaught TypeError: saleitem, description is not a function
This is a Scarf
This is a discounted Shirt

This is a Scarf
This is a Shirt
This is a Scarf
This is a discounted Shirt

This is a Scarf
This is a Shirt
This is a discounted Scard
This is a discounted Shirt

This is a Scaf
Uncaught TypeError: saleItem, description is not a function
This is a Shirt
This is a discounted Shirt

NEW QUESTION 118
A developer wants to use a module named universalContainersLib andthen 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’;universalContainersLib. foo ()7universalContainersLib.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();lib. bar ();

NEW QUESTION 119
Refer to the HTML below:

Which JavaScript statement results in changing ” The Lion.”?

document.querySelectorAll(‘$main $TONY’).innerHTML = ‘” The Lion

document.querySelector(‘$main li:second-child’).innerHTML = ” The Lion ‘;

document.querySelector(‘$main li.Tony’).innerHTML = ‘” The Lion ‘;

document.querySelector(‘$main li:nth-child(2)’),innerHTML = ” The Lion. ‘;

NEW QUESTION 120
A developer has a formatName function that takes two arguments, firstName and lastName and returns a string. They want to schedule the
function to run once after five seconds.
What is the correct syntax to schedule this function?

setTimeout (formatName(), 5000, “John”, “BDoe”);

setTimeout (formatName(‘John’, ”Doe’), 5000);

setTimout(() => { formatName(“John’, ‘Doe’) }, 5000);

setTimeout (‘formatName’, 5000, ‘John”, “Doe’);

NEW QUESTION 121
A developer implements and calls the following code when an application state change occurs:

If the back button is clicked after this method is executed, what can a developer expect?

A navigate event is fired with a state properly that details previous application state.

The page is navigated away from and previous page in the browser’s history is loaded.

The page reloads and all JavaScript is reinitialized.

A popstate event is fired with a state properly that details the application’s last state.

NEW QUESTION 122
Refer to the code below:
let timeFunction =() => {
console.log(‘Timer called.”);
};
let timerId = setTimeout (timedFunction, 1000);
Which statement allows a developer to cancel the scheduled timed function?

removeTimeout(timedFunction);

removeTimeout(timerId);

clearTimeout(timerId);

clearTimeout(timedFunction);

NEW QUESTION 123
Refer to the code below:

Which statement allows a developer to cancel the scheduled timed function?

removeTimeout (timeFunction) ;

removeTimeout (timerId) ;

ClearTimeout (timerId) ;

ClearTimeout (timeFunction);

NEW QUESTION 124
developer publishes a new version of a package with new features that do not break backward compatibility. The previous version number was 1.1.3.
Following semantic versioning format, what should the new package version number be?

2.0.0

1.2.3

1.1.4

1.2.0

NEW QUESTION 125
Refer to the code:

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

canTalk

speak

name

owner

type

NEW QUESTION 126
Refer to the following code that imports a module named utils:
import (foo, bar) from ‘/path/Utils.js’;
foo() ;
bar() ;
Which two implementations of Utils.js export foo and bar such that the code above runs without error?
Choose 2 answers

// FooUtils.js and BarUtils.js exist
Import (foo) from ‘/path/FooUtils.js’;
Import (boo) from ‘ /path/NarUtils.js’;

const foo = () => { return ‘foo’ ; }
const bar = () => { return ‘bar’ ; }
export { bar, foo }

Export default class {
foo() { return ‘foo’ ; }
bar() { return ‘bar’ ; }
}

const foo = () => { return ‘foo’;}
const bar = () => {return ‘bar’; }
Export default foo, bar;

NEW QUESTION 127
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?

[1, 2, 3, 4, 5, 4, 4]

[1, 2, 3, 4, 4, 5, 4]

[1, 2, 3, 5]

[1, 2, 3, 4, 5, 4]

NEW QUESTION 128
Refer to the code below:

Which value can a developer expect when referencing country,capital,cityString?

‘London’

undefined

An error

‘NaN’

NEW QUESTION 129
myArraym can have one level, two levels, or more levels.
Which statement flattens myArray when it can be arbitrarily nested?

myArray. reduce ((prev, curr) => prev.concat(curr) [ ]);

myArray. join (“,”). split (“,”);

[ ] .concat {. . .myArray) ;

myArray.flat(Infinity);

NEW QUESTION 130
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 ?

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();

NEW QUESTION 131
A developer wants to iterate through an array of objects and count the objects and count
the objects whose property value, name, starts with the letter N.
Const arrObj = [{“name” : “Zach”} , {“name” : “Kate”},{“name” : “Alise”},{“name” : “Bob”},{“name” :
“Natham”},{“name” : “nathaniel”}
Refer to the code snippet below:
01 arrObj.reduce(( acc, curr) => {
02 //missing line 02
02 //missing line 03
04 ). 0);
Which missing lines 02 and 03 return the correct count?

Const sum = curr.startsWith(‘N’) ? 1: 0;
Return acc +sum

Const sum = curr.name.startsWith(‘N’) ? 1: 0;
Return acc +sum

Const sum = curr.startsWIth(‘N’) ? 1: 0;
Return curr+ sum

Const sum = curr.name.startsWIth(‘N’) ? 1: 0;
Return curr+ sum

NEW QUESTION 132
Refer to following code:
class Vehicle {
constructor(plate) {
This.plate =plate;
}
}
Class Truck extends Vehicle {
constructor(plate, weight) {
//Missing code
This.weight = weight;
}
displayWeight() {
console.log(‘The truck ${this.plate} has a weight of ${this.weight} lb.’);}} Let myTruck = new Truck(‘123AB’, 5000); myTruck.displayWeight(); Which statement should be added to line 09 for the code to display ‘The truck 123AB has a weight of 5000lb.’?

Super.plate =plate;

super(plate);

This.plate =plate;

Vehicle.plate = plate;