An online shop needs to store information about clients and orders. A list of fixed properties for clients and orders exists. The data storage should enforce specific data types on these properties and ensure that each order is associated with an existing client. Which of the following cloud services is capable of fulfilling these requirements?
A relational database like MariaDB is capable of enforcing specific data types on properties and ensuring that each order is associated with an existing client through relational integrity constraints like foreign keys. These databases are well-suited for structured data and can handle the requirements of data type enforcement and relational linkage between clients and orders.
B. An object store like OpenStack Swift. The question mentions "Which of the following >>cloud<< services". Neither MariaDB nor MongoDB are "cloud" services, although they have cloud offerings, like MongoDB Atlas.
there is a DB cloud service, NoSql DB like MangoDB & Sql DB like MariaDB I think E is correct
I am agree with option B, because neither Mongo (except Mongodb Atlas ), nor Mariadb are cloud databases.