Answer:
A primary key is a special relational database table column (or combination of columns) designated to uniquely identify each table record. A primary key is used as a unique identifier to quickly parse data within the table. A table cannot have more than one primary key.
Primary Key.
Candidate Key.
Alternate Key.
Super Key.
Composite Key.
Foreign Key.
Unique Key.
In the relational model of databases, a primary key is a specific choice of a minimal set of attributes that uniquely specify a tuple in a relation. Informally, a primary key is "which attributes identify a record," and in simple cases constitute a single attribute: a unique ID.
Explanation:
1. The best option is C) pick an object at random, and keep track of how many copies of an object are left in a game.
2. The best option is D) clockwise and counterclockwise.
3. your 3rd question does not seem to be clear to me.
Answer:
O(n²)
Explanation:
The worse case time complexity of insertion sort using binary search for positioning of data would be O(n²).
This is due to the fact that there are quite a number of series of swapping operations that are needed to handle each insertion.
There Is an App that you downloaded that allows this. you have to find it and disable it
Answer:
The answer is A.Absolute reference.
Explanation:
Absolute reference is a cell reference whose location remains constant when the formula is copied.
