Crowdly

Vertical scaling only

Schema-based data model

Flexible schema

No Structure Query Language

What does NoSQL stand for?

Not Only SQL

Non-Relational Database

What are the four main types of NoSQL databases?

Document databases, key-value stores, column-oriented databases, and graph databases

Document databases, key-value stores, graph databases, and relational databases

Key-value stores, column-oriented databases, and graph databases

None of the above

Choose matching

Which NoSQL database model is best suited for handling large amounts of unstructured or semi-structured data?

Which NoSQL database model stores data in tabular form with rows and columns?

In which NoSQL database model is data stored as key-value pairs?

Which NoSQL database model is best suited for handling highly interconnected data like social networks?

When should you use a NoSQL database?

When you need to store a large amount of data

When you need to store data that is not well-suited for the relational model

When you need a database that is scalable and fault-tolerant

All of the above

Which NoSQL database is the most popular?

MongoDB

Cassandra

DynamoDB

All of the above

Which of the following is a document-oriented NoSQL database?

CouchDB

Cassandra

Neo4j

Redis

What is the main strategy for maintaining data quality in PostgreSQL?

Transaction isolation

Data encryption

Data validation constraints

100%

Backup and recovery

What is the purpose of Write-Ahead Logging (WAL) in PostgreSQL transaction recovery?

To log all user actions during a transaction

To provide a consistent state of the database after a system crash or unexpected shutdown

100%

To monitor and analyze database performance over time

To automatically rollback transactions that fail to commit