Question : 1 Which of the following is true about MongoDB?

• A

  MongoDB is a relational database management system (RDBMS).

• B

  MongoDB stores data in tables.

• C

  MongoDB uses SQL as its query language.

• D

  MongoDB stores data in JSON-like documents.

Question : 2 What is the primary database model used by MongoDB?

• A

  Relational Model

• B

  Document Model

• C

  Hierarchical Model

• D

  Network Model

Question : 3 Which of the following statements is true about collections in MongoDB?

• A

  Collections in MongoDB are similar to tables in relational databases.

• B

  Collections in MongoDB store data in key-value pairs.

• C

  Collections in MongoDB can only store a single document.

• D

  Collections in MongoDB use a fixed schema.

Question : 4 What is the purpose of the "_id" field in MongoDB documents?

• A

  To specify the data type of the document.

• B

  To store the creation date of the document.

• C

  To uniquely identify each document in a collection.

• D

  To define the primary key of the document.

Question : 5 Which of the following is NOT a data type supported by MongoDB?

• A

  String

• B

  Integer

• C

  Array

• D

  Date Object

Question : 6 Which of the following is true about BSON in MongoDB?

• A

  BSON stands for Binary Serialized Object Notation.

• B

  BSON is a binary representation of JSON-like documents used in MongoDB.

• C

  BSON is a query language for MongoDB.

• D

  BSON is used to define schema in MongoDB.

Question : 7 Which command is used to start the MongoDB server?

• A

  mongo

• B

  mongod

• C

  start mongod

• D

  run mongod

Question : 8 What is the default port number for MongoDB?

• A

  27017

• B

  3306

• C

  5432

• D

  8080

Question : 9 Which of the following is NOT a valid command in the MongoDB shell?

• A

  show dbs

• B

  use databaseName

• C

  create collectionName

• D

  insert documentName

Question : 10 Which command is used to create a new database in MongoDB?

• A

  create databaseName

• B

  use databaseName

• C

  db.createDatabase(databaseName)

• D

  db.databaseName.insert(document)

Question : 11 Which MongoDB method is used to query documents in a collection?

• A

  find()

• B

  query()

• C

  select()

• D

  search()

Question : 12 Which operator is used for equality comparison in MongoDB queries?

• A

  =

• B

  ==

• C

  ===

• D

  $eq

Question : 13 What is the purpose of the "limit" method in MongoDB queries?

• A

  To limit the number of documents returned by the query.

• B

  To sort the documents returned by the query.

• C

  To skip a specified number of documents in the query result.

• D

  To perform a case-insensitive search.

Question : 14 Which MongoDB method is used to update documents in a collection?

• A

  update()

• B

  modify()

• C

  save()

• D

  updateOne()

Question : 15 What is the purpose of the "sort" method in MongoDB queries?

• A

  To limit the number of documents returned by the query.

• B

  To skip a specified number of documents in the query result.

• C

  To perform a case-insensitive search.

• D

  To sort the documents returned by the query.

Question : 16 Which MongoDB method is used to delete documents from a collection?

• A

  remove()

• B

  delete()

• C

  deleteOne()

• D

  deleteMany()

Question : 17 What is the purpose of the "projection" parameter in MongoDB queries?

• A

  To specify the criteria for document selection.

• B

  To specify the fields to return in the query result.

• C

  To limit the number of documents returned by the query.

• D

  To sort the documents returned by the query.

Question : 18 Which MongoDB method is used to create an index on a collection?

• A

  createIndex()

• B

  index()

• C

  addIndex()

• D

  createIndexOne()

Question : 19 What is the purpose of indexing in MongoDB?

• A

  To sort documents in a collection.

• B

  To reduce the size of the database.

• C

  To improve the performance of queries by allowing faster access to data.

• D

  To compress data stored in the database.

Question : 20 Which MongoDB method is used to aggregate data from a collection?

• A

  aggregate()

• B

  group()

• C

  merge()

• D

  aggregate()

Question : 21 What is the purpose of the "pipeline" parameter in MongoDB aggregation?

• A

  To specify the criteria for document selection.

• B

  To specify the fields to return in the query result.

• C

  To define a sequence of data processing operations to be applied to the documents.

• D

  To sort the documents returned by the query.

Question : 22 Which MongoDB method is used to create a backup of a database?

• A

  backup()

• B

  dump()

• C

  snapshot()

• D

  mongodump()

Question : 23 What is the purpose of the "mongorestore" command in MongoDB?

• A

  To restore a backup of a database.

• B

  To create a backup of a database.

• C

  To drop a database.

• D

  To check the status of a database.

Question : 24 Which MongoDB method is used to retrieve metadata about the database server?

• A

  serverInfo()

• B

  serverMetadata()

• C

  dbStats()

• D

  isMaster()

Question : 25 What is the purpose of the "mongostat" command in MongoDB?

• A

  To view the status of a MongoDB instance.

• B

  To view the content of a database.

• C

  To perform statistical analysis on data stored in MongoDB.

• D

  To monitor the performance of a MongoDB instance.