Consider the transaction database in the table below: TID items_bought 1 {a, b, c, d} 2 {b, c, e, f} 3 {a, d, e, f} 4 {a, e, f} 5 {b, d, f} Show the prefix-based enumeration tree of frequent itemsets, for the data set of the table above at an absolute minimum support level of 2. Assume a lexicographic ordering of a, b, c, d, e, f.

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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.