Answer:
Say you have a key in a dictionary, or a key in a 2-d list. When you insert(), you are destructively iterating the original list and modifying it to reflect the insert() component. In order for the key to get lost you would have to do say insert(len: :1) which would remove the second key and therefore cause it to get "lost" because it will be destructivsly removed from its assignment and replaced by whatever you choose to insert.
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Answer:
Primary key retains its uniqueness even after you remove some of the fields.
Explanation:
I am assuming that this question is related to database. Therefore, I am answering it according to database context.
In database, you can have multiple rows and columns. Each column shows a specific attribute while each row plots the data according to the attributes. However, there is the first column of each of main table that has unique set of values. It is called the Primary Key. Some key features of primary key are:
- It always contains the unique value.
- Its value cannot be null.
- A table can have at max one primary key.
- It can be the combination of multiple columns but it must be unique.
Therefore, the primary key has the ability to retain its uniqueness even after you remove some of the fields.
The correct answer is that WWW. is universal, meaning that any and all url addresses start and have www.
My reasoning is that if you were to look up, lets say google, do :
www.(google).com ( remove parentheses )
then
google.com
You come up with the same results THUS YOUR CORRECT ANSWER IS YES! ALL URL ADDRESS HAVE AND CONTAIN WWW.!!!
Answer is A, Action query
