Input/output：练习题

In programming, which command is typically used to display data on the screen for the user to see?

Which type of validation check would be most effective to ensure a user enters a password that is at least 8 characters long?

A program reads data from a CSV file. Which of the following best describes the structure of a CSV file?

Which programming command is used to display information to the user on the screen?

Which of the following describes the process of checking if a user has entered a value into a required field?

State the name of the programming technique that allows a program to accept data from a user via a keyboard.

A program reads a list of names from a file. Describe one benefit of using a comma-separated value (CSV) format for this file.

A developer is creating a login system. Explain why authentication is required after the user provides their ID and password.

A software module reads data from a text file named log.csv.

(a) Describe the purpose of using validation when reading data from an external file.
(b) Provide two examples of validation checks that could be applied to a "UserAge" field read from the file.
(c) Write a code snippet to show how a program would open a file and read its contents.