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





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





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





Point out the wrong statement :





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





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





Instance exits cleanly is represented by ___ exit code





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





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





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





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





_____ bit builds of mongod enable journaling by default.





Point out the wrong statement :





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





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





Select the wrong statement :





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





$multiply __________ numbers to return the result.





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





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





Object_Id is similar to _________ key in Relational Databases





Point out the correct statement :





Point out the wrong statement :





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





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





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





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





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





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





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





Select the correct statement :





MongoDB supports fixed-size collections called ____________ collections.





MongoDB stores all documents in :





Select the wrong statement :





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





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





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





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





Which of the following sets the database profiler level ?





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





Select the correct statement :





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





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





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





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





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





MongoDB indexes use a _______ data structure.





MongoDB written in ?





What is the size of Chunk by default ?





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





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





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





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





In which format MongoDb store the data.





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





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





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





Select the correct statement :





Which of the following operator is not very selective ?





________ subtracts two dates to return the difference in milliseconds





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





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





Select the wrong statement :





MongoDB scales horizontally using _________ for load balancing purpose.





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





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





Select the wrong statement :





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





$ne returns true if the values are not _______





Select the correct statement :





Select the wrong statement :





Which of the following flag can be set by mongo shell





How many types of sharding exist in MongoDB ?





_____________ is used to initiate relica member set.





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





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





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





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





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





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





Point out the wrong statement :





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





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





Sharded clusters snapshots temporarily stop the balancer via :





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





Select the correct statement:





Select the wrong statement :





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





Point out the correct statement :





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





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





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





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





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





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





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





Select the correct statement :





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





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





MongoDB process collection of documents using _________ operations.





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