Answer:
Option (b) Presence Information.
Explanation:
Presence Information as the name suggests it includes the report of the employees present in the office at the moment. So, option (b) Presence Information is the best option available for Joshe as a Project Leader to keep track of the developers and analysts about their presence in the office. This can also be used weather the employees are busy, available or in a meeting or out of office and their availability on working on the project. Option (a) Desktop Sharing doesn't solves the purpose as different employee can share the desktop of a different employee. Option (c) Web Conferencing is not a correct option as it doesn't solves the purpose. Option (d) instant messaging doesn't solves the purpose as if they are busy in a project they might not be able to message instantly and it might be understood as Out Of Office and its not correct option available.
Answer:
insert i think sry if its wrong :(
Explanation:
Answer:
The correct answer is Option A (Referential integrity)
Explanation:
When a relational database table is in first normal form, that means it has no repeating fields or groups of fields, and hence all rows have the same columns, while if a relational database table is in second normal form, it implies that every non-key field is functionally dependent on the primary key. If can be in the third normal form if no non-key field is functionally dependent on any other non-key field.
A relational database on its own is a universal approved database model whose data is stored in tables divided into records and fields that serve as an information unit that organizes data points for easy access.
In the relational database, foreign keys are being checked to reference the primary key and enforce referential integrity so as to ensure that the foreign key must have a matching primary key. It means the reference from a row in one table to another table must be valid. Referential integrity concerns the concept of a foreign key normally enforced by the database management system.
A cache memory is a small piece of memory that can be accessed very fast. It keeps copies of data that is used often. For example, by keeping data read from a database in memory, the second time the data is needed, it can be taken from the cache in stead of a lengthy query in the database.
Caches can be found in hardware (ie., on the cpu itself), but also as a programming concept in software.
