Persist data can be stored in Android through.
A. Shared Preferences
B. Internal/External storage
C. SQlite
D. Network servers.
E. All of above
Ans: E. All of above
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Consider a database schema with four relations: Supplier, Product, Customer, and Contracts. Both the Supplier and the Customer relations have the attributes Id, Name, and Address. An Id is a nine-digit number. Product has PartNumber (an integer between 1 and 999999) and Name. Each tuple in the Contracts relation corresponds to a contract between a supplier and a customer for a speci?c product in a certain quantity for a given price.
a. Use SQL DDL to specify the schema of these relations, including the appropriate integrity constraints (primary, candidate, and foreign key) and SQL domains. b. Specify the following constraint as an SQL assertion: there must be more contracts than suppliers.
Methods in a subclass can be related to methods in a superclass in all of the following ways EXCEPT ____.
A. implementation of a concrete method. B. extension C. overriding D. finality
A presentation can only have one reviewer.
Answer the following statement true (T) or false (F)
When implementing the __init__ method in the AbstractBag class, what task should you leave out because it is the responsibility of the subclasses?
A. setting the self.size variable to 0 B. adding items from the source collection C. initializing the self.items variable D. checking if a source collection exists