QUESTION 3 a) Discuss the two advantages of using stored procedures as a way of implementing database queries. b) Explain the role of recovery manager DBMS module in database recovery? c) Define the four key assumptions of the Hadoop Distributed File System (HDFS). d) What is the difference between a name node and a data node in HDFS?

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Types of database architectures

A Database Architecture represents the Database Management System’s (DBMS) design (schema). The DBMS architecture makes it easy to understand the components involved in the database system and their relations. The DBMS architecture may vary based on the system on which it runs. Some systems contain both client and server machines whereas some run only on a server machine. Based on the architecture, the system can be classified as centralized, decentralized, or hierarchical.