Week 4, Thursday - Readings and Questions

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Question 1:
ACID (Atomicity, Consistency, Integrity and Durability) is a common set of properties used by databases.
CRUD (Create, Read, Update and Delete) are the four basic operations used to create and maintain data.

Question 2:
Multithreading is a set of processes running in paralell, that can be related or unrelated between each other. When 
programming for iOS is pretty important to keep heavy process in the background thread, or you could freeze your user 
interface for user interaction until the process is finished.

Question 3:
Boiler plate code are lines of code that is rarely modified and need to be spread through the entire applicaton. This would
make code less readable and with unnecessary size.

Question 4:
Fault handling ensures that is only one managed object to represent a single record. For example, it you have a custom object 
with another custom object as a property, this property will have a placeholder (fault) instead of holding the real object.
This way, there is need to allocate memory to hold the property object until necessary.

Question 5:
A cascade deletion can cause unexpected behavior because deleting a "parent" object automatic deletes every related "child"
objects. This could be necessary in certain scenarios, for example, when you have a Order and a Order Detail entities. After
you delete a Order object, keep the Order Detail objects is unnecessary and they could also be deleted.