MongoDB

MongoDB

CRUD Concepts has 10 Questions
A query may include a ___________ that specifies the fields from the matching documents to return.

selection
projection
union
None of the mentioned
Point out the correct statement :

Secondary indexes allow applications to store a view of a portion of the collection in an efficient data structure
MongoDB has full support for secondary indexes
Most indexes store an ordered representation of all values of a field or a group of fields
All of the mentioned
MongoDB stores all documents in :

tables
collections
rows
All of the mentioned
In MongoDB, _________ operations modify the data of a single collection.

CRUD
GRID
READ
All of the mentioned
Point out the wrong statement :

Indexes cannot enforce uniqueness in collection
CRUD stands for create, read, update, and delete
CRUD application is the most simplest application
All of the mentioned
Which of the following operation adds a new document to the users collection ?

add
insert
truncate
drop
Which of the following preference determines how the client direct read operations to the set ?

read
write
update
delete
Applications can also control the behavior of write operations using _______ concern.

read
write
truncate
All of the mentioned
Which of the following pipeline is used for aggregation in MongoDB ?

data processing
information processing
knowledge processing
None of the mentioned
MongoDB process collection of documents using _________ operations.

Hbase
Hive
Map-reduce
None of the mentioned