nosql module 1

Why do NoSQL databases emerge as an alternative to relational databases?

• • Limited scalability

• • Complex schemas

• • Lack of transactions

• • All of the above

What is the concept of "Impedance Mismatch" in the context of databases?

• Incompatibility between application code and database code

• Incompatibility between programming languages

• Incompatibility between data models used in an application and a database

• Incompatibility between hardware and software

In the context of NoSQL databases, what is the focus of "Document Databases"?

• Storing data in tables with predefined relationships

• Storing data as key-value pairs

• Storing and retrieving data in flexible, JSON-like documents

• Aggregating data into cohesive units

What does the term "Materialized Views" refer to in the context of data modeling?

• Aggregating data into cohesive units

• Storing a precomputed result of a query

• The process of data normalization

• A type of indexing mechanism

What are the key features of Key-Value Stores?

• Flexible schemas and complex transactions

• Simple schemas and complex transactions

• Simple schemas and simple transactions

• Flexible schemas and simple transactions

In the context of distribution models, what is "Sharding"?

• The process of dividing a database into smaller, more manageable parts

• A type of query language

• The concept of aggregating data

• A method for indexing data

What is the CAP Theorem, and what does it state?

• A theory about consistency, availability, and partition tolerance in distributed systems

• A model for aggregating data

• A concept in relational databases

• A theory about hardware components

In the context of NoSQL databases, what does the term "Aggregate" refer to?

• A type of database

• A unit of data that is treated as a whole

• The process of combining data

• A type of query language