In a replica, one node is primary node that receives?
1.all write operations
2. all read operations
3.all read and write operation
4. None of the above
Posted Date:-2022-01-27 08:40:27
Single replica set has limitation of?
1.10 Nodes
2.12 Nodes
3.8 Nodes
4.Infinite Nodes
Posted Date:-2022-01-27 08:43:31
What is true about $group stages in aggregation framework ?
1.This is a filtering operation and thus this can reduce the amount of documents that are given as input to the next stage.
2.This does the actual aggregation
3.Sorts the documents
4.none of the above
Posted Date:-2022-01-27 08:37:35
What is true about Query Routers?
1. Query routers are basically mongo instances, interface with client applications and direct operations to the appropriate shard.
2.The query router processes and targets the operations to shards and then returns results to the clients.
3.A sharded cluster can contain more than one query router to divide the client request load.
4.All of the above
Posted Date:-2022-01-27 08:45:55
Which command returns a document that provides an overview of the database process's state?
1.serverStatus
2. currentQueue
3. currentQu
4.clientStatus
Posted Date:-2022-01-27 08:48:02
Which method deletes multiple (specified) indexes on a collection?
1. dropIndexes()
2. dropIndex()
3. Both A and B can be used
4. getIndexes()
Posted Date:-2022-01-27 08:25:18
Which of the following is true about why to use Sharding?
1. In replication, all writes go to master node
2.Memory can't be large enough when active dataset is big
3.Vertical scaling is too expensive
4.All of the above
Posted Date:-2022-01-27 08:43:57
A replica set is a group of ___________ instances that host the same data set.
1.cluster
2.failover
3.mongod
4.Consensus
Posted Date:-2022-01-27 08:40:04
Each shard stores ________ data as the cluster grows.
1.less
2.more
3.equal
4.Can not say
Posted Date:-2022-01-27 08:47:18
How to create index in mongoDB?
1.index()
2.createIndex()
3.putIndex()
4.getIndex()
Posted Date:-2022-01-27 08:19:14
If MongoDB can use an index scan to obtain the requested sort order, the result will not include a SORT stage
1.TRUE
2.FALSE
3.Can be true or false
4.Can not say
Posted Date:-2022-01-27 08:50:45
In MongoDB client, how to initiate a new replica set?
1.rs.initiate()
2. rs.conf()
3.rs.status()
4.none of the above
Posted Date:-2022-01-27 08:41:13
In MongoDB, At which level write operations are atomic?
1.Collection
2.Document
3. Field
4.RowSet Interface
Posted Date:-2022-01-27 08:51:39
In production enviroment , how many sharded clusters have?
1.2
2.3
3. 4
4.5
Posted Date:-2022-01-27 08:44:22
Instead of Primary Key mongoDB use?
1. Embedded Documents
2.Default key _id
3.mongod
4. mongofiles
Posted Date:-2022-01-27 08:18:44
Point out the correct statement
1.High query rates can exhaust the CPU capacity of the server
2. Database systems with small data sets and high throughput applications can challenge the capacity of a single server
3.Smaller data sets exceed the storage capacity of a single machine
4.none of the above
Posted Date:-2022-01-27 08:46:25
Point out the correct statement.
1. For read-heavy applications, deploy sharding and add one or more shards to a sharded cluster to distribute load among mongod instances
2.Spikes in the number of available connections can also be the result of application or driver errors
3.For read-heavy applications, increase the size of your replica set and distribute read operations to secondary members
4.All of the above
Posted Date:-2022-01-27 08:49:34
Replica set is transparent to the application.
1. TRUE
2. FALSE
3.Can be true or false
4. Can not say
Posted Date:-2022-01-27 08:39:40
Replication is not used for?
1. keep your data safe
2. Low availability of data
3.Disaster recovery
4.Read scaling
Posted Date:-2022-01-27 08:39:14
The basic syntax of Aggregation is?
1.db.COLLECTION_NAME.aggregate ({key:1})
2.db.COLLECTION_NAME.aggregation (AGGREGATE_OPERATION)
3.db.COLLECTION_NAME.aggregate (AGGREGATE_OPERATION)
4.aggregate (AGGREGATE_OPERATION)
Posted Date:-2022-01-27 08:27:30
The default value of background Parameter is :
1.TRUE
2.FALSE
3.0
4.1
Posted Date:-2022-01-27 08:21:38
The default value of default_language Parameter is :
1.Mongo
2.DB
3.Mongod
4.English
Posted Date:-2022-01-27 08:24:58
The limit on the number of namespaces depend on the ?
1.<database>.ns size
2.<document>.ns size
3.<field>.ns size
4.. <row>.ns size
Posted Date:-2022-01-27 08:52:13
The maximum value of weights parameter is:
1.999
2. 9999
3.99999
4.99
Posted Date:-2022-01-27 08:26:02
The namespace file defaults to ?
1. 4 MB
2. 8 MB
3.16 MB
4.32 MB
Posted Date:-2022-01-27 08:52:42
To check the replica set configuration, issue the command rs.conf().
1. TRUE
2.FALSE
3. Can be true or false
4.Can not say
Posted Date:-2022-01-27 08:41:41
To check whether you are connected to primary or not, issue the command db.Master() in mongo client.
1.TRUE
2.FALSE
3.Can be true or false
4.Can not say
Posted Date:-2022-01-27 08:42:30
To create index in descending order, the value of key is?
1.1
2. 0
3. -1
4.infinite
Posted Date:-2022-01-27 08:21:13
What is the type of sparse parameter in createIndex()?
1.Boolean
2. string
3.integer
4.Documentation
Posted Date:-2022-01-27 08:26:31
What is the type of weights parameter in createIndex()?
1. Boolean
2. string
3. integer
4.Document
Posted Date:-2022-01-27 08:26:57
What is true about $skip stages in aggregation framework ?
1.This is a filtering operation and thus this can reduce the amount of documents that are given as input to the next stage.
2.This limits the amount of documents to look at, by the given number starting from the current positions.
3.With this, it is possible to skip forward in the list of documents for a given amount of documents.
4.none of the above
Posted Date:-2022-01-27 08:38:00
What is true about $unwind stages in aggregation framework ?
1. It is used to unwind document that are using arrays.
2.When using an array, the data is kind of pre-joined and this operation will be undone with this to have individual documents again.
3. This stage we will increase the amount of documents for the next stage.
4. All of the above
Posted Date:-2022-01-27 08:37:11
What is true about Replication?
1. Replication is the process of synchronizing data across multiple servers.
2. Replication provides redundancy and increases data availability with multiple copies of data on different database servers.
3.Replication protects a database from the loss of a single server.
4.All of the above
Posted Date:-2022-01-27 08:38:50
Which method returns the description of all the indexes int the collection?
1.putIndexes()
2. setIndexes()
3. getIndexes()
4.All of the above
Posted Date:-2022-01-27 08:25:42
Which of th following expression is used to calculates the average of all given values from all documents in the collection?
1. $sum
2.$avg
3.$min
4.$maximum
Posted Date:-2022-01-27 08:27:52
Which of th following expression is used to gets the first document from the source documents according to the grouping?
1. $addToSet
2. $first
3.$push
4. $last
Posted Date:-2022-01-27 08:29:06
Which of th following expression is used to gets the maximum of the corresponding values from all documents in the collection?
1.$sum
2.$push
3.$min
4. $max
Posted Date:-2022-01-27 08:28:17
Which of th following expression is used to Inserts the value to an array in the resulting document?
1. $addToSet
2. $first
3.$push
4.$last
Posted Date:-2022-01-27 08:28:41
Which of the following iis correct syntax of createindex?
1.db.COLLECTION_NAME.createIndex({KEY:1})
2.COLLECTION_NAME.createIndex({KEY:1})
3. db.COLLECTION_NAME.createIndex
4.db.createIndex({KEY:1})
Posted Date:-2022-01-27 08:19:39
Which of the following is correct syntax to Add Members to Replica Set?
1.db.add(HOST_NAME:PORT)
2. rs.add(HOST_NAME:PORT)
3.rs.isMaster(HOST_NAME:PORT)
4.db.isMaster(HOST_NAME:PORT)
Posted Date:-2022-01-27 08:42:07
Which of the following is not a Replica Set Features?
1.Automatic failover
2. Automatic recovery
3.Consensus election of primary
4.A cluster of only one nodes
Posted Date:-2022-01-27 08:40:52
Which of the following setting defines what constitutes a "slow" operation?
1. fastOpThresholdMs
2.slowOpThresholdZs
3. slowOpThresholdMs
4.slowOpThresholdGs
Posted Date:-2022-01-27 08:48:27
Which stages in aggregation framework is a filtering operation and thus this can reduce the amount of documents that are given as input to the next stage?
1.$limit
2.$match
3.Both A and B can be used
4.none of the above
Posted Date:-2022-01-27 08:38:21
Which stages in aggregation framework Used to select some specific fields from a collection?
1. $project
2.$group
3.$limit
4. $unwind
Posted Date:-2022-01-27 08:36:49
With which storage engine, MongoDB uses memory-mapped files to store data?
1.MMAPv2
2. MMAPv1
3. WiredTiger
4. All of the above
Posted Date:-2022-01-27 08:49:58
_____ returns the queryPlanner and executionStats information for the evaluated method.
1.cursor.explain()
2.tablescan.explain()
3.server.explain()
4.client.explain()
Posted Date:-2022-01-27 08:50:21
_____ returns the queryPlanner information for the evaluated method.
1. db.explain()
2.db.collection.explain()
3.collection.explain()
4.explain()
Posted Date:-2022-01-27 08:49:07
_____index allows efficient retrieval of chunks using the files_id and n values.
1.repairDatabase
2.dataFS
3.fileFS
4.GridFS
Posted Date:-2022-01-27 08:53:04
______ is the process of storing data records across multiple machines and it is MongoDB's approach to meeting the demands of data growth
1.Sharding
2.Config Servers
3.Query Routers
4.Projection
Posted Date:-2022-01-27 08:43:01
_______ scaling adds more CPU and storage resources to increase capacity.
1.Horizontal
2.Vertical
3.Partition
4.All of the above
Posted Date:-2022-01-27 08:46:47