MongoDB

MongoDB

⛪ Database Management > MongoDB

MongoDB ➲ MongoDB - Quiz

Q 1: Which is the method used to create Index in MongoDB?

  • A db.InitiateIndex()
  • B db.ensureIndex()
  • C db.initateIndex()
  • D All the Options

Q 2: Which is the Index used for multiple fields in MongoDB ?

  • A Mutikey Index
  • B Compound Index
  • C Single Field Index
  • D All the Options

Q 3: Which of the following method is used to create Index in MongoDB?

  • A db.initateIndex()
  • B db.getIndexes()
  • C db.ensureIndex()
  • D All the Options

Q 4: In MongoDB, these are used to index array data. Choose the correct option(s).

  • A Single Field Index
  • B MutiKey Index
  • C Compound Index
  • D All the Options

Q 5: Find the command that removes the user from the current database.

  • A db.dropUser()
  • B db.dropsUsers()
  • C db.getUsers()
  • D All the Options

Q 6: Find the command that removes the user from the current database.

  • A db.dropUser()
  • B db.dropsUsers()
  • C db.getUsers()
  • D All the Options

Q 7: What type of database program is MongoDB?

  • A SQL
  • B NoSQL
  • C Relational
  • D Object-oriented

Q 8: What type of database program is MongoDB?

  • A SQL
  • B NoSQL
  • C Relational
  • D Object-oriented

Q 9: What language is MongoDB not written in?

  • A Java
  • B C++
  • C Python
  • D Ruby

Q 10: When was MongoDB initially released?

  • A 2005
  • B 2007
  • C 2009
  • D 2011

Q 11: What type of documents does MongoDB use?

  • A CSV
  • B XML
  • C JSON-like
  • D Plain text

Q 12: What license is MongoDB released under?

  • A MIT License
  • B Apache License 2.0
  • C Server Side Public License
  • D GNU General Public License

Q 13: What was MongoDB originally developed as a component of?

  • A A database management system
  • B A cloud computing platform
  • C A mobile application development framework
  • D A social networking website

Q 14: When did 10gen change its name to MongoDB Inc .?

  • A 2007
  • B 2009
  • C 2011
  • D 2013

Q 15: When did MongoDB become a publicly traded company?

  • A 2015
  • B 2016
  • C 2017
  • D 2018

Q 16: What is the ticker symbol for MongoDB on NASDAQ?

  • A MGDB
  • B MONG
  • C MDB
  • D MDOO

Q 17: Where are MongoDB's US headquarters located?

  • A San Francisco
  • B New York City
  • C Seattle
  • D Boston

Q 18: What type of database is MongoDB?

  • A Relational
  • B Document-oriented
  • C Key-value
  • D Graph

Q 19: What is MongoDB's role in the MACH Alliance?

  • A Founding member
  • B Supporting member
  • C Honorary member
  • D Advisory board member

Q 20: What is the name of MongoDB's managed cloud database service?

  • A MongoDB Cloud
  • B MongoDB Atlas
  • C MongoDB Cloud Managed
  • D MongoDB Cloud Services

Q 21: Which operating systems is MongoDB available on?

  • A Windows Vista and later, Linux, OS X 10.7 and later, Solaris, and FreeBSD
  • B Windows XP and later, Linux, OS X 10.6 and later, and Android
  • C Windows 7 and later, Linux, iOS 10 and later, and FreeBSD
  • D Windows 8 and later, Linux, OS X 10.8 and later, and Chrome OS

Q 22: What is the purpose of a schema in MongoDB?

  • A To enforce strict data types
  • B To enforce strict data validation rules
  • C To allow for flexible data structures
  • D To allow for efficient indexing

Q 23: Which company did MongoDB team up with to offer a MongoDB-as-a-service solution?

  • A Amazon Web Services
  • B Google Cloud Platform
  • C Microsoft Azure
  • D Alibaba Cloud

Q 24: What is the main advantage of using a document-oriented database like MongoDB?

  • A Improved performance
  • B Easier data querying
  • C More flexible data modeling
  • D Better data security

Q 25: What is the primary programming language used for MongoDB's command-line interface?

  • A Java
  • B C++
  • C JavaScript
  • D Python

Q 26: What type of data storage engine does MongoDB use?

  • A InnoDB
  • B MyISAM
  • C WiredTiger
  • D Btrfs

Q 27: What type of solution does Alibaba Cloud offer for MongoDB?

  • A Managed offering
  • B Self-hosted offering
  • C Shared hosting offering
  • D Virtual private server offering

Q 28: Which of the following is a valid MongoDB query operator?

  • A $
  • B &
  • C #
  • D @

Q 29: What is a MongoDB collection?

  • A A group of related tables
  • B A group of related documents
  • C A group of related columns
  • D A group of related fields

Q 30: true about MongoDB indexes?

  • A They can only be created on a single field
  • B They can be created on multiple fields
  • C They can only be created on a collection's primary key
  • D They are not supported in MongoDB

Q 31: What is a MongoDB document?

  • A A group of related tables
  • B A group of related documents
  • C A group of related columns
  • D A group of related fields

Q 32: Which of the following is a valid MongoDB projection operator?

  • A $
  • B $
  • C #
  • D @

Q 33: What is MongoDB?

  • A A relational database management system
  • B A NoSQL document-oriented database
  • C A file storage system
  • D An operating system

Q 34: Which of the following languages can be used to interact with MongoDB?

  • A SQL
  • B Java
  • C Python
  • D All of the above

Q 35: Which of the following is a valid MongoDB data type?

  • A Integer
  • B Date
  • C String
  • D All of the above

Q 36: What is the default port number for MongoDB?

  • A 27017
  • B 3306
  • C 5432
  • D 1521

Q 37: Which of the following is a valid MongoDB command?

  • A SELECT
  • B UPDATE
  • C INSERT
  • D FIND

Q 38: What is sharding in MongoDB?

  • A A type of index
  • B A way to split a collection into multiple parts
  • C A way to sort documents in a collection
  • D A way to group documents in a collection

Q 39: What is the purpose of MongoDB's GridFS?

  • A To store large binary data, such as images or videos
  • B To store indexes for faster query performance
  • C To store backup files
  • D To store logs

Q 40: What is a MongoDB replica set?

  • A A set of related collections
  • B A set of related databases
  • C A set of related documents
  • D A set of related servers

Q 41: Which of the following is true about MongoDB transactions?

  • A They are not supported in MongoDB
  • B They are supported in MongoDB starting from version 4.0
  • C They are only supported in MongoDB Atlas
  • D They are only supported in MongoDB Enterprise

Q 42: What issue was addressed in MongoDB version 3.4.0?

  • A Stale reads
  • B Unauthorized access to database
  • C Denial of service attacks
  • D SQL injection attacks

Q 43: What limitation did MongoDB face before version 3.3.11?

  • A Inability to do collation-based sorting
  • B Inability to store binary data
  • C Inability to handle high traffic
  • D None of the above

Q 44: What read concern was introduced in MongoDB version 4.0?

  • A Snapshot read concern
  • B Read uncommitted
  • C Read committed
  • D Repeatable read

Q 45: What issue did Jepsen find with MongoDB 3.6.4?

  • A Unauthorized access to database
  • B Denial of service attacks
  • C Retrocausal transactions
  • D SQL injection attacks

Q 46: What type of locks were implemented on a per-server process basis before MongoDB version 2.2?

  • A Collection level locks
  • B Database level locks
  • C No locks were implemented
  • D All of the above

Q 47: Which storage engine uses an optimistic concurrency protocol that provides document-level locking?

  • A MMAPv1
  • B WiredTiger
  • C Both and
  • D None of the above

Q 48: Which version of MongoDB introduced pluggable storage engines?

  • A 2.2
  • B 2.6
  • C 3.0
  • D 3.6

Q 49: What security issue was faced by MongoDB in the past?

  • A Cross-site scripting attacks
  • B Unauthorized access to database
  • C Denial of service attacks
  • D SQL injection attacks

Q 50: What measures were taken by MongoDB to defend against security risks?

  • A Binaries from official packages bind to localhost by default
  • B Networked connections to the database will be denied unless explicitly configured
  • C Both and
  • D None of the above

Q 51: When were locks implemented at the database level in MongoDB?

  • A Before version 2.2
  • B With version 2.2
  • C Since version 3.0
  • D None of the above

Q 52: What approach can be used to increase concurrency in MongoDB?

  • A Use sharding
  • B Use pessimistic concurrency control
  • C Use locking at the document level
  • D Use optimistic concurrency control

Q 53: When did MongoDB introduce pluggable storage engines?

  • A Since version 2.2
  • B Since version 3.0
  • C Since version 3.3.11
  • D None of the above

Q 54: What is the snapshot read concern introduced in MongoDB 4.0 used for?

  • A To allow anyone to have full access to the database
  • B To eliminate the phenomenon of documents being missed during queries against an index
  • C To address the issue of MongoDB returning stale reads
  • D None of the above

Q 55: What security measure did MongoDB implement in its 2.6 release onwards?

  • A Bind all networked connections to the database by default
  • B Allow anyone to have full access to the database
  • C Allow ransomware attacks to hold MongoDB servers hostage
  • D None of the above

Q 56: What technical criticism was addressed in MongoDB version 3.4.0?

  • A MongoDB could not do collation-based sorting
  • B Locks were implemented on a per-server process basis
  • C MongoDB could return stale reads
  • D Queries against an index were not atomic

Q 57: What is lock yielding in MongoDB?

  • A A mechanism to prevent concurrent writes to the same document
  • B A feature that allows multiple database instances to synchronize data
  • C A strategy to increase concurrency by temporarily releasing locks
  • D A mechanism to prevent data corruption during power outages