Database - Mongodb Test

Test Instructions :

1. The Test is 1hr duration.
2. The Test Paper consists of 30 questions. The maximum marks are 30.
3. All the questions are multiple choice question type with three options for each question.
4. Out of the three options given for each question, only one option is the correct answer.
5. Each question is allotted 1 mark for each correct response.
6. 0.25 will be deducted for incorrect response of each question.
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Use __________ to encrypt communication between mongod and mongos components of a MongoDB client as well as between all applications and MongoDB.





Documents enter a multi-stage __________ that transforms the documents into an aggregated result.





Point out the wrong statement :





Sharded clusters snapshots temporarily stop the balancer via :





MongoDB applies the _________ phase, which collects and condenses the aggregated data.





MongoDB provides a ________ index type that supports searching for string content in a collection.





MongoDB written in ?





______ returns true if the first value is less than the second.





Select the wrong statement :





To describe the message structure, a ________ like struct is used.





Which of the following operator is not very selective ?





The ________ message is used to update a document in a collection.





_____________ is used to initiate relica member set.





Select the correct statement :





Which of the following sets the database profiler level ?





Select the wrong statement :





_______ adds numbers to return the sum, or adds numbers and a date to return a new date.





Which of the field is reserved for use as a primary key ?





_______ returns the remainder of the first number divided by the second.





In sharded clusters, delayed members have limited utility when the __________ is enabled.





An index cannot cover a query on a _______ collection when run against a mongos if the index does not contain the shard key.





Point out the correct statement :





________ subtracts two dates to return the difference in milliseconds





Point out the wrong statement :





An ________ query plan has returned a threshold number of matching results





Backup can also create snapshots of _________ that are run as single-member replica sets.





MongoDB process collection of documents using _________ operations.





Which of the following provide acceptable performance levels for multiple mongod instances?





Select the correct statement:





Ops Manager maintains one _____ database for each backed-up replica set





The aggregation pipeline can use ___________ to improve its performance during some of its stages.





MongoDB supports the creation of user-defined ascending/descending indexes on a ______ field of a document.





Select the correct statement :





_____ bit builds of mongod enable journaling by default.





Which of the following flag can be set by mongo shell





To generate pseudo-random data to use for a keyfile, issue the following __________ command.





String expressions, with the exception of ________ only have a well-defined behavior for strings of ASCII characters.





In the mongo shell, you can access the creation time of the ObjectId, using the ______ method..





What is the size of Chunk by default ?





MongoDB supports the execution of JavaScript code for certain server-side operations like:





$ne returns true if the values are not _______





The __________ method returns a document that includes a metrics field.





Instance exits cleanly is represented by ___ exit code





Ops Manager _________ provides an interface for configuring MongoDB nodes and clusters and for upgrading your MongoDB deployment.





Which of the following document configures the threshold which determines whether a query is “slow” for the purpose of the logging system ?





Point out the correct statement :





_______ divides the data set and distributes the data over multiple servers, or shards.





MongoDB stores all documents in :





Point out the wrong statement :





A query _______ consists of a combination of query, sort, and projection specifications.





Which of the following code is used for successful exit of task ?





The ______ index is unique and prevents clients from inserting two documents with the same value for the _id field.





If you create the user administrator before enabling access control, MongoDB disables the ________ exception.





Which of the following operation adds a new document to the users collection ?





GridFS uses a _________ index on the chunks collection for the files_id and n fields.





Map-reduce uses custom __________ functions to perform the map and reduce operations.





Select the correct statement :





Object_Id is similar to _________ key in Relational Databases





Select the correct statement :





Use the __________ option to ensure that MongoDB listens for connections from applications on configured addresses.





Which of the following query is used to generate a new ObjectId, use the ObjectId() constructor with no argument





_______ is /srv/mongodb, which specifies where MongoDB will store its data files





______________ specifies the number of documents to return in each batch of the response from the MongoDB instance.





MongoDB supports fixed-size collections called ____________ collections.





Delayed members are a ________ or a running “historical” snapshot of the data set





Select the wrong statement :





Replica set configuration requires that the _______ have a value that is consistent among all members of the set.





If you use the localhost exception when deploying a new MongoDB system, the first user you create must be in the ________ database.





If your storage system does not support snapshots, you can copy the files directly using :





In MongoDB, _________ operations modify the data of a single collection.





Select the wrong statement :





Select the correct statement :





Which of the following database command is used for mapreduce function ?





MongoDB indexes use a _______ data structure.





MongoDB uses ______ indexes to index the content stored in arrays.





Which of the following operation can be optionally used for map reduce ?





Select the wrong statement :





The agent ships initial sync and oplog data over HTTPS back to:





Which of the following will display complete list of available cursor flags ?





A query may include a ___________ that specifies the fields from the matching documents to return.





Indexes are typically available in ______ or located sequentially on disk.





Running data aggregation on the ________ instance simplifies application code and limits resource requirements.





___________ is used to determine whether a query is a covered query .





Select the wrong statement :





Which of the following is used to display the replica set configuration object ?





$multiply __________ numbers to return the result.





To provide high availability and data consistency, in a production sharded cluster, each shard is a :





The update() method uses the _______ command, which uses the default write concern.





What would be the maximum document size for results of mapreduce operation ?





Ops Manager reads directly from the Backup Blockstore database and transfers files either through :





With ___________ enabled, MongoDB forces all clients to identify themselves before granting access to the server.





In which format MongoDb store the data.





_________ allows only one agent of each type per machine and will remove additional agents.





_______ scaling adds more CPU and storage resources to increase capacity.





_______ may block reads, including those necessary to verify authentication.





MongoDB scales horizontally using _________ for load balancing purpose.





How many types of sharding exist in MongoDB ?





Setting _______ enables authentication and specifies a key file for the replica set member use to when authenticating to each other.





____________ are operations that process data records and return computed results.





MongoDB also supports user-defined indexes on multiple fields called :





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