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.
Start Test

   Time Left : 00 : 30    : 00

What is the size of Chunk by default ?

  

  

  

  

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

  

  

  

  

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

  

  

  

  

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

  

  

  

  

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

  

  

  

  

Point out the wrong statement :

  

  

  

  

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

  

  

  

  

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

  

  

  

  

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

  

  

  

  

Point out the correct statement :

  

  

  

  

MongoDB process collection of documents using _________ operations.

  

  

  

  

In which format MongoDb store the data.

  

  

  

  

$ne returns true if the values are not _______

  

  

  

  

________ subtracts two dates to return the difference in milliseconds

  

  

  

  

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

  

  

  

  

Which of the following operator is not very selective ?

  

  

  

  

Object_Id is similar to _________ key in Relational Databases

  

  

  

  

$multiply __________ numbers to return the result.

  

  

  

  

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

  

  

  

  

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

  

  

  

  

MongoDB indexes use a _______ data structure.

  

  

  

  

Which of the following sets the database profiler level ?

  

  

  

  

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

  

  

  

  

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

  

  

  

  

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 :

  

  

  

  

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

  

  

  

  

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

  

  

  

  

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

  

  

  

  

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

  

  

  

  

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

  

  

  

  

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

  

  

  

  

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

  

  

  

  

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

  

  

  

  

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

  

  

  

  

Select the correct statement :

  

  

  

  

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

  

  

  

  

Select the correct statement :

  

  

  

  

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

  

  

  

  

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

  

  

  

  

Select the wrong statement :

  

  

  

  

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

  

  

  

  

Select the wrong statement :

  

  

  

  

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

  

  

  

  

Select the wrong statement :

  

  

  

  

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

  

  

  

  

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

  

  

  

  

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

  

  

  

  

MongoDB scales horizontally using _________ for load balancing purpose.

  

  

  

  

_____________ is used to initiate relica member set.

  

  

  

  

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

  

  

  

  

Select the correct statement :

  

  

  

  

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

  

  

  

  

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

  

  

  

  

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

  

  

  

  

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 :

  

  

  

  

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

  

  

  

  

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

  

  

  

  

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

  

  

  

  

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

  

  

  

  

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

  

  

  

  

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

  

  

  

  

Select the wrong statement :

  

  

  

  

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

  

  

  

  

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

  

  

  

  

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

  

  

  

  

Sharded clusters snapshots temporarily stop the balancer via :

  

  

  

  

Which of the following flag can be set by mongo shell

  

  

  

  

Point out the wrong statement :

  

  

  

  

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

  

  

  

  

_____ bit builds of mongod enable journaling by default.

  

  

  

  

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

  

  

  

  

_______ 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 wrong statement :

  

  

  

  

Instance exits cleanly is represented by ___ exit code

  

  

  

  

Select the correct statement :

  

  

  

  

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

  

  

  

  

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

  

  

  

  

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

  

  

  

  

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

  

  

  

  

MongoDB supports fixed-size collections called ____________ collections.

  

  

  

  

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

  

  

  

  

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

  

  

  

  

Select the correct statement:

  

  

  

  

MongoDB written in ?

  

  

  

  

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

  

  

  

  

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

  

  

  

  

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

  

  

  

  

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

  

  

  

  

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

  

  

  

  

MongoDB stores all documents in :

  

  

  

  

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

  

  

  

  

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

  

  

  

  

Select the wrong statement :

  

  

  

  

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

  

  

  

  

Point out the wrong statement :

  

  

  

  

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

  

  

  

  

Select the correct statement :

  

  

  

  

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