Answer:
Answered below
Explanation:
aFile = open("books.txt", "r")
This code uses the function open() which takes two parameters. The first parameter is the file name while the second parameter is the mode in which you are accessing the file.
The "r" mode opens the file in a reading state. That is, you can only read from the file. This code completes the reading process
aFile.read( )
The "w" mode opens the file so you can write to it and make changes.
The "a" mode opens the file so you can add contents to it.
Answer
File names should describe the content of the file.
Explanation
File names are set of words which are used to uniquely identify computer files which are stored in a file system. This helps one to know the contents of the file which you want to find. When you name these file names you use necessary characters you use descriptive words so that you dont have hard times when searching for them. The naming also is determined by the file system you are using because different systems impose different restrictions on the length of the file names and the allowed characters within file names.
Answer:
Check the explanation
Explanation:
The SELECT statement that returns these columns are:
SELECT
list_price,
discount_percent,
ROUND (list_price * discount_percent / 100,2) AS discount_amount
FROM
products;
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