What is a database in a database?

When a developer sets out to create new data he has to ensure he provides good data quality and is able to incorporate and integrate different systems in the main. Moreover, all the integrated systems should be able to perform well together. When a developer has to design a custom object for integration into a back-end system he needs to configure the custom field as unique and then configure a custom field as an external ID.

This will allow the systems to identify the custom field and integrate it into the main system seamlessly. For seamless integration, the developer needs to troubleshoot issues in the code and ensure the two systems work alongside one another.

Partial dependency is a form of dependency when non-prime attributes is functionally dependent on a part of the candidate key.
To better understand this, we need to know what candidate key and non-prime attributes are.

Using the example above
(PROJ_NUM, EMP_NUM, PROJ_NAME, EMP_NAME, JOB_CLASS, CHG_HOURS, HOURS) is a functional dependency.

(EMP_PROJ) is the candidate key.
Other attributes, such as NUM, NAME, HOURS, JOB and CLASS are non-prime attributes.
Of all the options only option A is correct, as it non-prime attributes (NUM and NAME) that functionally depend on a part of the candidate key (PROJ).