Question

Which of the following is a key feature of a non-relational database like NoSQL?

a.It efficiently uses indexes as a means to provide efficient access to data and is supported directly in the database rather than maintained in the application code.
b.It is integrated well into an application infrastructure within a database stack.
c.It ensures strong consistency such that applications should be able to read what has been written to the database immediately.
d.It is designed for highly available systems that should provide a consistent, high-quality experience for all users globally.

Answer 1

A key feature of non-relational databases like NoSQL is their ability to scale out and provide consistent user experiences globally, often through an eventual consistency model rather than strong consistency. This allows NoSQL databases to handle concurrent data access efficiently and support distributed systems effectively.

Step-by-step explanation:

The key feature of a non-relational database like NoSQL that is asked about in the question is its design for highly available systems to provide a consistent, high-quality experience for users globally. This feature reflects the distributed nature of NoSQL databases which are designed to scale out by distributing data across multiple servers. As opposed to traditional relational databases that ensure strong consistency and often prioritize ACID (Atomicity, Consistency, Isolation, Durability) properties, NoSQL databases may follow a different consistency model known as eventual consistency. This allows for greater flexibility and scalability at the cost of not having immediate consistency across all nodes at any given time. NoSQL databases often provide mechanisms for dealing with concurrent data access and conflict resolution without locking the system, making them well-suited for distributed systems.