BackBone.js MCQs (Chapterwise Multiple Choice Questions)

Which of the following Backbonejs collection methods is used for adding a model at the beginning of a collection?

collection.at(begin. model)

collection.get(id. model, [options])

collection.unshift(model. [options])

collection.push(model, [options])

Answer & Explanation

Correct Answer: collection.unshift(model. [options])

Note: This Question is unanswered, help us to find answer for this one

In relation to Grunt plugin QUint task configuration options, which of the following options is the default value of timeout option?

1.000 milliseconds

3.000 milliseconds

4.000 milliseconds

5.000 milliseconds

Answer & Explanation

Correct Answer: 4.000 milliseconds

Note: This Question is unanswered, help us to find answer for this one

Which two of the following options are the ItemView Life-Cycle Event callbacks?

onBeforeltemAdded

onAfterltemAdded

onBeforeRender

onRender

Answer & Explanation

Correct Answer: onRender

Note: This Question is unanswered, help us to find answer for this one

In relation to Marionette, which of the following CollectionView Life-chle Event callback is used for allowing custom code to be added to manipulate the view‘s el further?

onBeforeRender

onRender

onBeforeltemAdded

None of the above.

Answer & Explanation

Correct Answer: onRender

Note: This Question is unanswered, help us to find answer for this one

In relation to Sinon-QUnit, which of the following options is used for testing callbacks and functions throughout the code, and also used for determining that how many times a particular function has been executed?

Stubs

Mocks

Test Spies

Fake Servers

Answer & Explanation

Correct Answer: Test Spies

Note: This Question is unanswered, help us to find answer for this one

Which of the following options is used for setting a new set of events and handlers for the View and removing the previous events?

delegateEvents()

events

undelegateEvents()

setElement()

Answer & Explanation

Correct Answer: delegateEvents()

Note: This Question is unanswered, help us to find answer for this one

While using Handlebars with Backbone.js. which of the following options is used for representing blocks in Handlebars?

[[\expression}}

{(#expressionn

{{\\expression]]

[{lexpression}}

Answer & Explanation

Correct Answer: {(#expressionn

Note: This Question is unanswered, help us to find answer for this one

While using JavaScript, which of the following string functions is used for extracting a subString from the string that begins at the start position through the specif‌ied number of characters?

subString

substr

Split

trim

Answer & Explanation

Correct Answer: subString

Note: This Question is unanswered, help us to find answer for this one

In relation to File Array format. which of the following additional Grunt file properties when set to true. Is used for allowing the user to build the f‌ile object dynamically?

Filter

Dot

expand

nonuH

Answer & Explanation

Correct Answer: Dot

Note: This Question is unanswered, help us to find answer for this one

Which of the following Jasmine-jQuery matchers is used for checking, if an element on the page is correctly rendered?

toBeSelected(name)

toBe(jQuerySelector)

toBeChecked( jQuerySelector)

toHaveData ( name, jQuerySelector)

Answer & Explanation

Correct Answer: toBe(jQuerySelector)

Note: This Question is unanswered, help us to find answer for this one

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