Describe what relationship types represent in an ER model and provide examples of unary, binary, ternary, and quaternary relationships.
What will be an ideal response?
A relationship type is a set of associations between one or more participating entity types
Unary: Staff Supervise Staff (also called recursive relationship)
Binary: Branch Has Staff
Ternary: Staff Registers Client at Branch
Quaternary: Solicitor Arranges Bid with a Buyer supported by a Financial
Institution.
You might also like to view...
A server process maintains a shared information object such as the BLOB object. Give arguments for and against allowing the client requests to be executed concurrently by the server. In the case that they are executed concurrently, give an example of possible ‘interference’ that can occur between the operations of different clients. Suggest how such interference may be prevented.
What will be an ideal response?
If you were going to catch an exception of type Exception, where should this catch block be placed within your code?
What will be an ideal response?
In this expression,
____ is a form of social engineering, characterized by attempts to fraudulently acquire sensitive information by posing as a trustworthy person or business in an apparently official electronic communication.
A. Cross-site scripting B. Denial of service C. Phishing D. SQL injection