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Mongodb Questions Set 9:

Quiz Mode

__________ provides statistics on the per-collection level.

mongosniff

mongooplog

mongotop

mongofiles

Solution:

Which of the following MongoDB collections is capped?

system.index

system.replica

system.profile

All of the mentioned

Solution:

Object_Id in MongoDB is similar to which key in Relational Databases?

All of the mentioned

primary key

secondary key

composite key

Solution:

Which of the following MongoDB aggregation pipeline stages can be used to implement field-level redaction?

$skip

$redact

$limit

$match

Solution:

Which of the following read preference modes should not be used to provide extra capacity for reads?

primary

primaryPreferred

secondary

None of the mentioned

Solution:

The __________ JavaScript shell and the MongoDB language drivers translate between BSON and the language-specific document representation.

mongod

mongo

json

none of the above

Solution:

Which of the following statements about MongoDB query results is correct?

Intervening read operations on a document may result in a cursor that returns a document more than once if that document has changed.

None of the above.

The MongoDB server returns the query results in batches.

Subsequent batch size is 50 megabytes.

Solution:

Which of the following statements is correct?

Applications that handle monetary data often require capturing fractional units of currency

Applications that handle time data often require capturing fractional units of currency

Applications that handle temporal and spatial data often require capturing fractional units of currency

All of the above

Solution:

Point out the wrong statement.

If you need to query the database for exact, mathematically valid matches, use Exact Precision

If you regularly need to perform server-side arithmetic on monetary data, the exact precision model may be appropriate

If you need to query the database for exact, mathematically valid matches, use Ambiguity Precision

None of the above

Solution:

Which statement about MongoDB sharding is incorrect?

When a query does not include a shard key, the mongos can use cluster metadata from the config database to route the queries to shards

On larger clusters, scatter gather queries are unfeasible for routine operations

Replica sets use read preferences to determine where and how to route read operations to members of the replica set

None of the above

Mongodb Questions Set 9:

__________ provides statistics on the per-collection level.

Solution:

Which of the following MongoDB collections is capped?

Solution:

Object_Id in MongoDB is similar to which key in Relational Databases?

Solution:

Which of the following MongoDB aggregation pipeline stages can be used to implement field-level redaction?

Solution:

Which of the following read preference modes should not be used to provide extra capacity for reads?

Solution:

The __________ JavaScript shell and the MongoDB language drivers translate between BSON and the language-specific document representation.

Solution:

Which of the following statements about MongoDB query results is correct?

Solution:

Which of the following statements is correct?

Solution:

Point out the wrong statement.

Solution:

Which statement about MongoDB sharding is incorrect?

Solution:

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