Point out the wrong statement :
Authentication does not require an authentication mechanism
To enable authentication on a sharded cluster, you must enable authentication individually on each component of the cluster
The content of the key file must be the same on all cluster members
All of the mentioned
Select the wrong statement :
Scaling by adding capacity do not have limitations.
cloud-based providers may only allow users to provision smaller instances
There is a practical maximum capability for vertical scaling
MongoDB written in ?
Javascript
C
C++
The agent ships initial sync and oplog data over HTTPS back to:
Opscore Manager
Ops Manager
mongod
None of the mentioned
The update() method uses the _______ command, which uses the default write concern.
find
read
update
modify
Ops Manager reads directly from the Backup Blockstore database and transfers files either through :
TCP
HTTPS
MMS
With ___________ enabled, MongoDB forces all clients to identify themselves before granting access to the server.
access
authentication
authorization
all of the mentioned
______________ specifies the number of documents to return in each batch of the response from the MongoDB instance.
cursor.batchSize(size)
cursor.Size(size)
cursor.batch(size)
If you use the localhost exception when deploying a new MongoDB system, the first user you create must be in the ________ database.
head
local
admin
Which of the following operation adds a new document to the users collection ?
add
insert
truncate
drop
In which format MongoDb store the data.
SQL
XML
BSON
Which of the following provide acceptable performance levels for multiple mongod instances?
GridFS
SST
SSD
The ______ index is unique and prevents clients from inserting two documents with the same value for the _id field.
_id
$default
_def
Select the correct statement :
If an appropriate index exists for a query, MongoDB cannot use the index to limit the number of documents it must inspect
Indexes support the efficient execution of queries in MongoDB
The index stores the location of a specific field or set of fields, ordered by the value of the field
The ________ message is used to update a document in a collection.
UPDATE
OP_UPDATE
OP_UPDATES
Secondary indices is not available in MongoDB
MongoDB supports search by field, range queries, regular expression searches
MongoDB can store the business subject in the minimal number of documents
Point out the correct statement :
The amount of oplog to keep per backup is configurable and affects the time window available for checkpoint and point-in-time restores
To get a consistent snapshot of a sharded system, you must enable the balancer
Backups produced by copying the underlying data do support point in time recovery
In MongoDB, clients cannot see the results of writes before they are made durable
Users may configure read preference on a per-connection basis to prefer that the read operations return results from the secondary members
Clients cannot read data which may be subsequently rolled back
______ returns true if the first value is less than the second.
$lte
$lt
$setEquals
MongoDB supports the creation of user-defined ascending/descending indexes on a ______ field of a document.
Single
Non Unique
Compound
$ne returns true if the values are not _______
equivalent
null
0
none of the mentioned
The aggregation pipeline can use ___________ to improve its performance during some of its stages.
indexes
OptmData
functions
Config servers are not replica sets
Sharding requires a number of mongod instances with different configurations
The config servers store the cluster’s metadata, while the cluster distributes data among one or more shard servers
In the mongo shell, you can access the creation time of the ObjectId, using the ______ method..
getTime()
getTimestamp()
Timestamp()
_________ allows only one agent of each type per machine and will remove additional agents.
Automation
Performance
Monitoring
Backup
____________ are operations that process data records and return computed results.
ReplicaAgg
SumCalculation
Aggregations
If your storage system does not support snapshots, you can copy the files directly using :
cp
copy
snap
Which of the following will display complete list of available cursor flags ?
cursor.Option()
cursor.addOption()
cursor.addOptions()
Which of the following document configures the threshold which determines whether a query is “slow” for the purpose of the logging system ?
systemLog.verbosity
operationProfiling.mode
operationProfiling.slowOpThresholdMs
Which of the following operator is not very selective ?
$nine
$nin
$ain