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NoSQL Databases and Document Stores

Description: This quiz covers the fundamental concepts, features, and usage of NoSQL databases and document stores, including their advantages, limitations, and real-world applications.
Number of Questions: 15
Created by:
Tags: nosql document stores mongodb apache couchdb cassandra dynamodb data modeling scalability performance
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What is the primary distinction between NoSQL databases and traditional relational databases?

  1. NoSQL databases use a schema-less data model, while relational databases require a predefined schema.

  2. NoSQL databases are optimized for horizontal scaling, while relational databases are designed for vertical scaling.

  3. NoSQL databases are document-oriented, while relational databases are table-oriented.

  4. All of the above.

Show answer
Correct Option: D
Explanation:

NoSQL databases differ from relational databases in terms of data modeling, scalability, and data structure.

Which of the following is a popular document store NoSQL database?

  1. MongoDB

  2. Apache CouchDB

  3. Cassandra

  4. DynamoDB

Show answer
Correct Option: A
Explanation:

MongoDB is a widely used document store NoSQL database known for its flexibility and ease of use.

What is the primary data structure used in document stores?

  1. Tables

  2. Rows

  3. Documents

  4. Columns

Show answer
Correct Option: C
Explanation:

Document stores utilize documents as their primary data structure, where each document is a self-contained unit of data.

Which NoSQL database is known for its column-family data model?

  1. MongoDB

  2. Apache CouchDB

  3. Cassandra

  4. DynamoDB

Show answer
Correct Option: C
Explanation:

Cassandra is a column-family NoSQL database that provides high scalability and fault tolerance.

What is the main advantage of using a NoSQL database over a relational database?

  1. NoSQL databases are faster.

  2. NoSQL databases are more scalable.

  3. NoSQL databases are easier to use.

  4. NoSQL databases are more flexible.

Show answer
Correct Option: D
Explanation:

NoSQL databases offer greater flexibility in terms of data modeling and schema design, making them suitable for various use cases.

Which NoSQL database is designed for real-time applications and provides low latency?

  1. MongoDB

  2. Apache CouchDB

  3. Cassandra

  4. DynamoDB

Show answer
Correct Option: D
Explanation:

DynamoDB is an Amazon Web Services (AWS) NoSQL database optimized for real-time applications and high throughput.

What is the concept of denormalization in the context of NoSQL databases?

  1. Storing duplicate data across multiple documents to improve performance.

  2. Breaking down complex data structures into simpler ones.

  3. Creating multiple tables for different types of data.

  4. Using a hierarchical data model to organize data.

Show answer
Correct Option: A
Explanation:

Denormalization in NoSQL involves duplicating data across multiple documents to enhance performance and reduce the need for joins.

Which NoSQL database is known for its ability to handle large volumes of unstructured data?

  1. MongoDB

  2. Apache CouchDB

  3. Cassandra

  4. Elasticsearch

Show answer
Correct Option: D
Explanation:

Elasticsearch is a NoSQL database designed specifically for handling large amounts of unstructured data and is commonly used for search and analytics applications.

What is the primary data structure used in Cassandra?

  1. Tables

  2. Rows

  3. Documents

  4. Columns

Show answer
Correct Option: D
Explanation:

Cassandra utilizes a column-family data model, where data is organized into column families and columns.

Which NoSQL database is known for its automatic sharding and replication features?

  1. MongoDB

  2. Apache CouchDB

  3. Cassandra

  4. DynamoDB

Show answer
Correct Option: D
Explanation:

DynamoDB offers automatic sharding and replication, making it a highly scalable and fault-tolerant NoSQL database.

What is the primary data structure used in MongoDB?

  1. Tables

  2. Rows

  3. Documents

  4. Columns

Show answer
Correct Option: C
Explanation:

MongoDB uses a document-oriented data model, where data is stored in JSON-like documents.

Which NoSQL database is known for its ACID (Atomicity, Consistency, Isolation, Durability) properties?

  1. MongoDB

  2. Apache CouchDB

  3. Cassandra

  4. DynamoDB

Show answer
Correct Option: C
Explanation:

Cassandra provides ACID guarantees, ensuring data integrity and consistency across multiple nodes.

What is the primary data structure used in Apache CouchDB?

  1. Tables

  2. Rows

  3. Documents

  4. Columns

Show answer
Correct Option: C
Explanation:

Apache CouchDB utilizes a document-oriented data model, similar to MongoDB.

Which NoSQL database is known for its ability to handle large volumes of time-series data?

  1. MongoDB

  2. Apache CouchDB

  3. Cassandra

  4. InfluxDB

Show answer
Correct Option: D
Explanation:

InfluxDB is a NoSQL database specifically designed for storing and analyzing time-series data.

What is the concept of a 'collection' in MongoDB?

  1. A group of related documents.

  2. A table-like structure.

  3. A field within a document.

  4. A database within a MongoDB instance.

Show answer
Correct Option: A
Explanation:

In MongoDB, a collection is a logical grouping of related documents, similar to a table in a relational database.

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