Question 1

What is the result of the code block?

Options :

A : The console logs only 'flag'.

B : The console logs 'flag' and another flag.

C : An error is thrown.

D : The console logs 'flag' and then an error is thrown.

Answer: D

Question 2

Given two expressions var1 and var2. What are two valid ways to return the logical ANDof the two expressions and ensure it is data type Boolean ?Choose 2 answers:

Options :

A : Boolean(var1 && var2)

B : var1 && var2

C : var1.toBoolean() && var2toBoolean()

D : Boolean(var1) && Boolean(var2)

Answer: A,D

Question 3

Which javascript methods can be used to serialize an object into a string and deserializea JSON string into an object, respectively?

Options :

A : JSON.stringify and JSON.parse

B : JSON.serialize and JSON.deserialize

C : JSON.encode and JSON.decode

D : JSON.parse and JSON.deserialize

Answer: A

Question 4

Universal Containers recently launched its new landing page to host a crowd-fundingcampaign. The page uses an external library to display some third-party ads. Once the page isfully loaded, it creates more than 50 new HTML items placed randomly inside the DOM, like theone in the code below: Capture 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 5

Which three actions can be using the JavaScript browser console?Choose 3 answers:

Options :

A : View and change DOM the page.

B : Display a report showing the performance of a page.

C : Run code that is not related to page.

D : view , change, and debug the JavaScript code of the page.

E : View and change security cookies.

Answer: A,C,D