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Answer:
Yes, we can.
Explanation:
We can combine with the arithmetic and the concatenation operators to provide augmented assignment operations in the programming language Python.
This mean we can abbreviate expressions like n = n + 1
For example:
n += 10 this is equal to n = n + 10
n += "example" this is equal to n = n + "example"
In this example we have
variable = variable operator expression equal to variable operator = expression.
These arguments are often used in Python's loops.
Answer:
1) Yes, Publisher relation should have a publisherID primary key.
2) NOT NULL and UNIQUE for the BookID, BranchID, CardNumber and name of the borrower in the Book, Book_Copies, Library_branch, and Borrower relations respectively. The DueDate field of the book_loan relation must be a time constraint. The BookID of the Book relation must be serial number for automatic addition and update of bookid across the database.
Explanation:
The Publisher relation should have primary key publisherID which should replace the publisherName in the Book relation to easily make a join query and attain a third-level database model.
Answer:
Option (B) is the correct answer to the following question.
Explanation:
Here, in the code "const" is the constant keyword which is used when we need that the value stored in that variable will never change.
The following option is correct because the assignment operator are those operator which initialize the value in the variable and overloading of the assignment operator would be as we use the other operators and also we could use them by creating the objects as we use in the copy constructor.
So, that's why the following option is correct.
Answer:
Of course it does contribute