NoSQL databases

What are the reasons for considering NoSQL databases?

• Scalability

• High Availability

• Flexibility

• Cost-effectiveness

What does "scaling out" means?

• Scaling by adding more servers

• Scaling by using more powerful server

Which databases are AP based on CAP theorem?

• PostgreSQL

• Cassandra

• MongoDB

• CouchDB

What are the properties of Key-Value Pair databases?

• They store data in columnar format

• They are often designed for simplicity and speed

• They have limited possibilities when it comes to querying data

• They allow for fast lookups

• They require strict database schema

What data types are supported by Redis without additional extensions?

• Bloom filters

• Sorted sets

• Binary trees

• Strings

What are common use cases for Redis?

• Caching engine

• Storing persistent data about financial transactions

• Representing social networks

• Message broker

What format is used by MongoDB documents?

• XML

• Plaintext

• JSON

• Protobuf

What data structure is used by Elasticsearch to allow for efficient full-text search?

• Parallel index

• B-tree index

• Inverted index

• Compound index

Which of the following are column-oriented databases?

• MongoDB

• MySQL

• Cassandra

• Neo4j

What are the pieces of a single point stored in InfluxDB?

• measurement

• fields

• time

• labels