Which of the following constraints might impact your data model for MongoDB?

• A.Security & Compliance
• B.RAM
• C.Network
• D.Operating System

Comment: *

Name: *

Email: *

Verification: *

Suppose you have a companies collection in your database. Only the following documents are stored in this collection: { _id: ObjectId("52cdef7c4bab8bd675297da4"), name: 'Powerset', category_code: 'search', founded_year: 2006 }, { _id: ObjectId("52cdef7c4bab8bd675297da5"), name: 'Technorati', category_code: 'advertising', founded_year: 2002 }, { _id: ObjectId("52cdef7c4bab8bd675297da7"), name: 'AddThis', category_code: 'advertising', founded_year: 2004 }, { _id: ObjectId("52cdef7c4bab8bd675297da8"), name: 'OpenX', category_code: 'advertising', founded_year: 2008 }, { _id: ObjectId("52cdef7c4bab8bd675297daa"), name: 'Sparter', category_code: 'games_video', founded_year: 2007 }, { _id: ObjectId("52cdef7c4bab8bd675297dac"), name: 'Veoh', category_code: 'games_video', founded_year: 2004 }, { _id: ObjectId("52cdef7c4bab8bd675297dae"), name: 'Thoof', category_code: 'web', founded_year: 2006 } What is the default sort order in the result set returned in response to the following query?

• A.db.companies.aggregate( [ { "$sortByCount": "$category_code" } ] )
• B.ascending
• C.descending

Comment: *

Name: *

Email: *

Verification: *

$group stage can be used multiple times within an aggregation pipeline.

• A.False
• B.True

Comment: *

Name: *

Email: *

Verification: *

What do you mean by collection scan during query execution?

• A.It can use the index to limit the number of documents it must check.
• B.It scans every document in a collection, to select those documents that match the query.

Comment: *

Name: *

Email: *

Verification: *

Select true statement regarding to the MongoDB Atlas. (select 1)

• A.MongoDB Atlas is a MongoDB service that can work with any database.
• B.MongoDB Atlas includes many tools and services specifically designed for the MongoDB database.

Comment: *

Name: *

Email: *

Verification: *