MCQs on Introduction to MongoDB | MongoDB MCQs
MongoDB is a popular NoSQL database that enables scalable and flexible data management. It uses a document-oriented model, allowing developers to store, query, and analyze unstructured or semi-structured data efficiently. Known for its flexibility, horizontal scaling, and powerful querying capabilities, MongoDB is widely used in modern applications. Explore its features, use cases, and comparison with relational databases below.
MCQs on MongoDB
1. What is MongoDB?
- MongoDB is a…
a) Relational Database Management System
b) Key-Value Store
c) Document-oriented NoSQL Database
d) In-Memory Database - MongoDB stores data in which format?
a) JSON-like Documents
b) Tabular Format
c) Key-Value Pairs
d) Binary Data - The main use case of MongoDB is:
a) Handling complex transactions
b) Storing unstructured or semi-structured data
c) Real-time analytics for financial applications
d) High-volume audio processing - MongoDB belongs to which database category?
a) Relational Databases
b) Columnar Databases
c) NoSQL Databases
d) Graph Databases - What is the primary benefit of using MongoDB?
a) Guaranteed ACID compliance
b) High availability and horizontal scalability
c) Fixed schema design
d) Low cost
2. Features and Use Cases
- Which MongoDB feature supports scalability?
a) Sharding
b) Indexing
c) Aggregation
d) Normalization - Which of these is NOT a feature of MongoDB?
a) Flexible Schema Design
b) ACID Transactions
c) JSON-like Documents
d) Fixed Column Size - A key use case for MongoDB is:
a) Complex relational queries
b) E-commerce product catalog
c) Banking transactions
d) High-frequency trading systems - MongoDB’s replica sets provide:
a) Data Sharding
b) Data Recovery and High Availability
c) Data Compression
d) Faster Sorting - What is aggregation used for in MongoDB?
a) Importing data
b) Querying relationships
c) Summarizing data
d) Writing documents
3. Installation and Setup
- MongoDB is available for:
a) Windows only
b) Linux and macOS only
c) All major operating systems
d) Only cloud platforms - Which command is used to start MongoDB?
a) start-mongo
b) mongod
c) mongo-start
d) init-mongo - The default port for MongoDB is:
a) 27015
b) 3306
c) 27017
d) 8080 - What is the name of the configuration file used for MongoDB?
a) mongo.conf
b) mongod.conf
c) mongodb.ini
d) config.json - To install MongoDB using a package manager on Ubuntu, you run:
a) apt-get install mongodb
b) yum install mongodb
c) brew install mongodb
d) docker pull mongodb
4. MongoDB vs. Relational Databases
- Which of the following does MongoDB not require?
a) Tables
b) Primary Keys
c) Fixed Schema
d) Collections - MongoDB differs from relational databases by:
a) Supporting strict data types
b) Using tables and rows
c) Storing data in documents
d) Lacking support for query languages - Relational databases are generally better suited for:
a) Distributed systems
b) Structured data with strong relationships
c) High-volume unstructured data
d) Schema-less storage - MongoDB’s scalability is achieved through:
a) Vertical Scaling
b) Horizontal Scaling
c) Data Archiving
d) Query Optimization - In MongoDB, data relationships are typically handled by:
a) Normalization
b) Joins
c) Embedding or Referencing
d) Stored Procedures
Additional Mixed Questions
- What is a collection in MongoDB?
a) A table equivalent
b) A JSON array
c) A key-value pair
d) A data block - Which query language does MongoDB use?
a) SQL
b) JSON Query Language
c) Mongo Query Language (MQL)
d) SPARQL - In MongoDB, a document is:
a) A file in the database
b) A JSON-like object
c) A table row equivalent
d) Both b and c - The command to view all databases in MongoDB is:
a) list dbs
b) show databases
c) get dbs
d) dbs show - Which MongoDB tool is used for data backup?
a) mongodump
b) mongorestore
c) mongoexport
d) mongodbump - Which of the following supports dynamic queries in MongoDB?
a) Aggregation Pipeline
b) SQL Joins
c) Stored Procedures
d) Query Optimizer - In MongoDB, the
find()method is used for:
a) Updating documents
b) Querying documents
c) Deleting documents
d) Creating indexes - What is a BSON in MongoDB?
a) Binary format of JSON
b) Data Backup Format
c) A query optimizer
d) A type of index - Which feature ensures consistency in MongoDB transactions?
a) Sharding
b) Read Concern
c) Replica Set
d) Write Concern - Which cloud platform does NOT offer MongoDB as a service?
a) AWS
b) Google Cloud
c) IBM Watson
d) Azure
Answer Key
| Q No | Answer (Option with Text) |
|---|---|
| 1 | c) Document-oriented NoSQL Database |
| 2 | a) JSON-like Documents |
| 3 | b) Storing unstructured or semi-structured data |
| 4 | c) NoSQL Databases |
| 5 | b) High availability and horizontal scalability |
| 6 | a) Sharding |
| 7 | d) Fixed Column Size |
| 8 | b) E-commerce product catalog |
| 9 | b) Data Recovery and High Availability |
| 10 | c) Summarizing data |
| 11 | c) All major operating systems |
| 12 | b) mongod |
| 13 | c) 27017 |
| 14 | b) mongod.conf |
| 15 | a) apt-get install mongodb |
| 16 | c) Fixed Schema |
| 17 | c) Storing data in documents |
| 18 | b) Structured data with strong relationships |
| 19 | b) Horizontal Scaling |
| 20 | c) Embedding or Referencing |
| 21 | a) A table equivalent |
| 22 | c) Mongo Query Language (MQL) |
| 23 | d) Both b and c |
| 24 | b) show databases |
| 25 | a) mongodump |
| 26 | a) Aggregation Pipeline |
| 27 | b) Querying documents |
| 28 | a) Binary format of JSON |
| 29 | d) Write Concern |
| 30 | c) IBM Watson |