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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   Time Left : 00 : 30    : 00

Instance exits cleanly is represented by ___ exit code





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





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





Select the correct statement :





Point out the correct statement :





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





MongoDB written in ?





Select the correct statement :





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





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





Which of the following sets the database profiler level ?





In which format MongoDb store the data.





Object_Id is similar to _________ key in Relational Databases





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





_____________ is used to initiate relica member set.





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





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





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





MongoDB indexes use a _______ data structure.





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





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





Select the correct statement :





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.





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





MongoDB scales horizontally using _________ for load balancing purpose.





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





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





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





Use __________ to encrypt communication between mongod and mongos components of a MongoDB client as well as between all applications and MongoDB.





Point out the wrong statement :





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





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





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





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





Select the wrong statement :





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





Sharded clusters snapshots temporarily stop the balancer via :





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





MongoDB supports fixed-size collections called ____________ collections.





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





Select the wrong statement :





Select the wrong statement :





How many types of sharding exist in MongoDB ?





MongoDB stores all documents in :





Point out the wrong statement :





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





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





Select the correct statement :





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





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





$multiply __________ numbers to return the result.





Point out the wrong statement :





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





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





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





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





Point out the correct statement :





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





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





Select the correct statement :





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





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





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





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





Select the wrong statement :





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





Which of the following operator is not very selective ?





What is the size of Chunk by default ?





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





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





Select the correct statement:





________ subtracts two dates to return the difference in milliseconds





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





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





_____ bit builds of mongod enable journaling by default.





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





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





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





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





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





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





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





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





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





$ne returns true if the values are not _______





Select the wrong statement :





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





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





Point out the wrong statement :





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





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





MongoDB process collection of documents using _________ operations.





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





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





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





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





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





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





Select the wrong statement :





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