DATABASE NoSQL

What is a distinctive feature of NoSQL databases compared to relational ones?

• They require strict schemas to function correctly

• They are designed only for structured data

• They use SQL as the main language

• They can operate without predefined schemas

What advantage does horizontal scalability offer in NoSQL?

• Allows more queries to be executed on a single server

• Requires less data in the cloud

• Machines can be added to increase capacity without relying on a single machine

• Forces the consolidation of all data into a single central table

What type of data can a NoSQL database store?

• Only plain text

• JSON, XML, images, and videos

• Only relational data

• Only integers and booleans

What is a disadvantage of NoSQL databases?

• Lack of standardization among solutions

• Data cannot be queried

• They do not work in real-time

• They only allow one type of data

Why are NoSQL databases suitable for messaging applications?

• Only because they have better security

• Because they allow flexible structures and real-time processing

• Because they use SQL for network connections

• Because they automatically compress all data

What is meant by schema flexibility in NoSQL?

• Fields are fixed but values can vary

• Only the names of the fields can be modified

• New fields can be added without redefining the structure

• It is mandatory to use a tree structure

Which of the following is a typical use of NoSQL?

• Exclusive storage of operating system logs

• Real-time financial calculations

• IoT and mobile applications

• Development of low-level firmware

Which database is an example of a document-oriented database?

• MySQL

• Oracle

• PostgreSQL

• MongoDB

What advantage do NoSQL databases offer in terms of performance?

• Require less processing voltage

• Do not require indexes or queries

• Are optimized for specific loads and targeted queries

• Eliminated the need for physical storage

What hinders the adoption of NoSQL databases?

• Their high compatibility with SQL

• The learning curve for users of relational databases

• The lack of capacity to store data

• The absence of cloud support