Im goin to be honest with you i dont understand this question at all can you xplain it alittle more plz cuz if i go back three letters it is o
Answer:
This code will no get executed properly.It will give keyerror Brianna.
Explanation:
In this dictionary we defined in the code the there is no key Brianna hence there is no corresponding value to Brianna.So assigning ages['Brianna] to value will obviously give error since there exits no key with this name.So the code will give error.
Answer:
a) We know that atleast one or more author writes a book.
Symbol to indicate one or more is (B)
So the correct option is B
b) We know that zero to multiple books are written by any author.
Symbol to indicate zero or more is (A)
So the correct option is A
c) The fourth option is correct if we replace by many to many relationship and generate a new entity.
So the relationship betweem author and contract is one to many. So we know that there is atleast one author that represent in symbol d and books has atleast 0 that represent in symbol c.
So Fourth Option is correct d at blue side and c at red side.
d) There are two forirgn keys in table Contract one is from AuthorId and other is ISBN.
So correcct option is C
Answer: Database design is the model created of data/information for any particular organization .the relation between the information and which data is to be stored is the most important factor for designing .These parameters are decided by the designer of the database.
After the decision of the designed the data is invoked in the database .The data representation in the theoretical manner is known as ontology.The classification and relation defining is the purpose of the database design.
Answer: Sorry I’m late but the answer is open
Explanation: Edge 2021
