Question 1

A 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 turnaround 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?

Options :

A : NODE_DEBUG=true node server.js

B : DEBUG=http, https node server.js

C : NODE_DEBUG=http,https node server.js

D : DEBUG=true node server.js

Answer: D

Question 2

Universal Containers recently launched its new landing page to host a crowd-funding

campaign. The page uses an external library to display some third-party ads. Once the page is

fully loaded, it creates more than 50 new HTML items placed randomly inside the DOM, like the

one in the code below:

All the elements includes the same ad-library-item class, They are hidden by default, and they are randomly displayed while the user navigates through the page.

Options :

A : Use the DOM inspector to prevent the load event to be fired.

B : Use the browser to execute a script that removes all the element containing the class ad-library-item.

C : Use the DOM inspector to remove all the elements containing the class ad-library-item.

D : Use the browser console to execute a script that prevents the load event to be fired.

Answer: B

Question 3

Considering type coercion, what does the following expression evaluate to?

True + '13' + NaN

Options :

A : ' 113Nan '

B : 14

C : ' true13 '

D : ' true13NaN '

Answer: D

Question 4

Refer to the 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 missing code for the code to display 'The truck 123AB has a

weight of 5000lb.

Options :

A : super(plate)

B : super.plate = plate

C : Vehicle.plate = plate

D : this.plate = plate

Answer: A

Question 5

Refer to HTML below:

The current status of an Order: <span id =''status''> In Progress </span>

Which JavaScript statement changes the text 'In Progress' to 'Completed' ?

Options :

A : document.getElementById(''status'').Value = 'Completed' ;

B : document.getElementById(''#status'')[removed] = 'Completed' ;

C : document.getElementById(''status'')[removed] = 'Completed' ;

D : document.getElementById(''.status'')[removed] = 'Completed' ;

Answer: C

Confidently Practice Online with Free DEX602 Exam Cram

Buying Options: