Question 2 (a) Describe with a diagram the use of “fork-exec” commands where the parent process is waiting for child process. Show an output of the execution of such a command. (b) Write a simple C++ program using fork to create a parent-child process, in a Linux environment.  (c) Describe the output screen captured after the execution of the above C++ program.

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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.