Hitachi Vantara Senior Consultant 2 Interview Questions and Answers

NoSQL databases are non-relational databases that store and retrieve data in a non-tabular format.

• Document-oriented databases (MongoDB, Couchbase)

• Key-value stores (Redis, Riak)

• Column-family stores (Cassandra, HBase)

• Graph databases (Neo4j, OrientDB)

Scaling refers to the process of increasing or decreasing the capacity of a system to handle more or less load.

• Vertical Scaling: Adding more resources to a single node

• Horizontal Scaling: Adding more nodes to a system

• Load Balancing: Distributing the load across multiple nodes

• Database Sharding: Splitting a database into smaller parts to distribute the load

• Caching: Storing frequently accessed data in memory for faster acc