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JavaScript-Developer-I Questions and Answers

Question # 1

Universal Containers (UC) notices that its application that allows users to search for

accounts makes a network request each time a key is pressed. This results in too many

requests for the server to handle.

● Address this problem, UC decides to implement a debounce function on string change

handler.

What are three key steps to implement this debounce function?

Choose 3 answers:

A.

If there is an existing setTimeout and the search string change, allow the existing

setTimeout to finish, and do not enqueue a new setTimeout.

B.

When the search string changes, enqueue the request within a setTimeout.

C.

Ensure that the network request has the property debounce set to true.

D.

If there is an existing setTimeout and the search string changes, cancel the existing

setTimeout using the persisted timerId and replace it with a new setTimeout.

E.

Store the timeId of the setTimeout last enqueued by the search string change handle.

Question # 2

Given the requirement to refactor the code above to JavaScript class format, which class

definition is correct?

A)

B)

C)

D)

Question # 3

Refer to the code below:

Which replacement for the conditional statement on line 02 allows a developer to correctly determine

that a specific element, myElement on the page had been clicked?

A.

event.target.id =='myElement'