Command Line

Question 1

What is a CLI?

Answer 1

Command Line Interface. It receives commands from a user in the form of lines of text which provides a means of setting parameters for the environment, invoking executables, and providing information to them as to what actions they are to perform. Runs in a terminal and you type lines at it. CLI for a specific program.

Question 2

What is a GUI?

Answer 2

Graphical User Interface. A form of user interface that allows users to interact with electronic devices through graphical icons and audio indicator such as primary notation, instead of text-based UIs, typed command labels, or text navigation.

Question 3

Give at least one use case for man

Answer 3

When you need to know more about how to use a command.

Question 4

Give at least one use case for cat

Answer 4

When you want to see the text of a file in the terminal.

Question 5

Give at least one use case for ls

Answer 5

When you want to see the files in a directory.

Question 6

Give at least one use case for pwd

Answer 6

When you want to see what directory you’re working on.

Question 7

Give at least one use case for echo

Answer 7

When you want to put the text you write into a new file.

Question 8

Give at least one use case for touch

Answer 8

When you want to create a new file.

Question 9

Give at least one use case for mkdir

Answer 9

When you want to create a new directory or a new folder.

Question 10

Give at least one use case for mv

Answer 10

When you want to move or rename a file.

Question 11

Give at least one use case for rm

Answer 11

When you want to delete a file.

Question 12

Give at least one use case for cp

Answer 12

When you want to copy files for use.

Question 13

What are the three virtues of a great programmer?

Answer 13

1. Laziness: The quality that makes you go to great effort to reduce overall energy expenditure. It makes you write labor-saving programs that other people will find useful and document what you wrote so you don’t have to answer so many questions about it.
2. Impatience: The anger you feel when the computer is being lazy. This makes you write programs that don’t just react to your needs, but actually anticipate them. Or at least pretend to.
3. Hubris: The quality that makes you write (and maintain) programs that other people won’t want to say bad things about.