Answer:
Hello there! There are 4 parts to this question, all regarding relational database concepts.
Explanation:
Parts 1, 2, 3, 4 are drawn in attachments. For Part 4, the "foreign keys" would be the id fields of the joining table, and the "primary keys" are the IDs of the table itself. Data types are "integer" for ID, "string" for text columns like Name and Location, and "Decimal" for Hourly rate in the Timesheet table. Note that we can further simplify the erd from the one constructed earlier in part 3 to remove the Project Manager model and instead add a Project Manager "boolean" flag in the Employee table since a Project Manager is also an Employee.
Assuming the client is using a web browser, your answer would most likely be the Hyper-Text Transfer Protocol (HTTP).
HTTP is a very, very common way of transfering insensitive data from client to server. HTTPS is more secure, adding a secure socket layer to protect communications from being intercepted.
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As an alternative answer, the FTP (File Transfer Protocol) may be an acceptable answer, but this is usually not the primary method of communication for clients, as it is mainly used to access and modify files on the server, requiring a username-password combo to do so (usually).
Answer:
the answer is D Smart Object