Question 1

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?

Options :

A : removeTimeout(timedFunction);

B : removeTimeout(timerId);

C : clearTimeout(timerId);

D : clearTimeout(timedFunction);

Answer: C

Question 2

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 3

A developer is creating a simple webpage with a button. When a user clicks this buttonfor the first time, a message is displayed.The developer wrote the JavaScript code below, but something is missing. Themessage gets displayed every time a user clicks the button, instead of just the first time.01 function listen(event) {02 alert ( 'Hey! I am John Doe') ;03 button.addEventListener ('click', listen);Which two code lines make this code work as required?Choose 2 answers

Options :

A : On line 02, use event.first to test if it is the first execution.

B : On line 04, use event.stopPropagation ( ),

C : On line 04, use button.removeEventListener(' click'' , listen);

D : On line 06, add an option called once to button.addEventListener().

Answer: C,D

Question 4

Refer to the expression below:Let x = ('1' + 2) == (6 * 2);How should this expression be modified to ensure that evaluates to false?

Options :

A : Let x = ('1' + ' 2') == ( 6 * 2);

B : Let x = ('1' + 2) == ( 6 * 2);

C : Let x = (1 + 2) == ( '6' / 2);

D : Let x = (1 + 2 ) == ( 6 / 2);

Answer: B

Question 5

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

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