AICTE-FDP/NHCE-MCA/MONGODB

1. Searching for elements in a document array requires you specify a positional element (i.e. document.arrary[i]).

• True

• False

MongoDB enforces attribute similarity across documents in a collection (i.e. all word documents must have an array of synonyms).

• True

• False

To find all documents that do not contain the attribute 'synonyms' this query will work. db.words.find({synonyms:{$exist:false}})

• True

• False

In Mongo, frequently accessed data is stored:

• On disk

• In memory

Indexes can make document queries faster but:

• They can make inserts and updates slightly slower

• Require specialized query commands to even be leveraged (in other words, hints)

• They do not work in a replica set environment