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Javascript Questions Set 122:

Quiz Mode

What are 'refs' in React?

reference

refs

refas

rrfs

Solution:

Which of the following is a web application API framework?

Dojo

YUI

GWT

jQuery

Solution:

The libraries that build a new higher-level API for client-side programming is ________

Library

Framework

APIs

Script

Solution:

What is the only way to trigger a state change in a Redux application?

Dispatching an action

Calling getState()

Using useEffect()

Using useReducer()

Solution:

Which method is used to cancel future invocations of the function scheduled with setInterval()?

clearInvocation()

cancelInvocation()

clearInterval()

clear()

Solution:

How to pick a document element based on the value of its id attribute?

getElementsById()

getElementById()

Both getElementsById() and getElementById()

getElement()

Solution:

Which option of the draggable widget is used so that the element goes back to its previous position after we have dragged the element?

resizable

change

revert

collapsable

Solution:

What is the purpose of the property PerformanceTiming.fetchStart?

Browser ready to fetch input

Browser ready to fetch document

Browser ready to fetch summary

Browser ready to fetch output

Solution:

When is an application said to have good runtime performance?

When the speed of response to user interactions is fast

When the speed of user requests is fast

When the speed of sending data is fast

When the speed of receiving data is fast

Solution:

When is it recommended to pass this.setState as a function rather than an object?

When the new state depends on the old state

When the new state does not depend on the old state

When the new state should completely replace the old state

None of these

Javascript Questions Set 122:

What are 'refs' in React?

Solution:

Which of the following is a web application API framework?

Solution:

The libraries that build a new higher-level API for client-side programming is ________

Solution:

What is the only way to trigger a state change in a Redux application?

Solution:

Which method is used to cancel future invocations of the function scheduled with setInterval()?

Solution:

How to pick a document element based on the value of its id attribute?

Solution:

Which option of the draggable widget is used so that the element goes back to its previous position after we have dragged the element?

Solution:

What is the purpose of the property PerformanceTiming.fetchStart?

Solution:

When is an application said to have good runtime performance?

Solution:

When is it recommended to pass this.setState as a function rather than an object?

Solution:

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