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?

Backbone - Quiz(MCQ)

trim

Split

substr

subString

Correct Answer : subString

Recently Updated in Backbone Questions

Which code can you use for the deleteLists?

deleteList: function() { if (confirm(delete a list?')) { bTask.views.activeListMenuItem.model.destroy(); } return false; }

deleteList: function() { if (confirm(delete a list?')) { bTask.models.activeListMenuItem.model.destroy(); } return false; }

deleteList: function() { if (confirm(delete a list?')) { bTask.views.activeListMenuItem.model.removeAll(); } return false; }

None of the above

Correct Answer : deleteList: function() { if (confirm(delete a list?')) { bTask.views.activeListMenuItem.model.destroy(); } return false; }

How can an event be binded to an object?

object.listen(event,callback)

object.on(event, callback)

object.trigger(event,callback)

object.addListener(event,callback)

Correct Answer : object.on(event, callback)

How can a set of models be retrieved from the server and into the collection when they arrive?

collection.get()

collection.fetch()

collection.getJSON(url)

collection.retrive()

Correct Answer : collection.retrive()

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