Using pipes, streams and redirects (4)

Question 1

Which of the following is a symbol or symbol combination used for STDIN redirection?

1. |
2. >
3. > >
4. <
5. 2>
6. 2»

Answer 1

1. |
   AND
2. <
   The < symbol is used for STDIN redirection, such as with the tr command, and the pipe symbol is also used for STDIN redirection, when redirecting STDOUT from a command as STDIN to the next command in the pipeline.

Question 2

Which of the following is a symbol or symbol combination used for STDOUT redirection?
Correct selection
1. |
2. >ÿ
3.&raquo_space;ÿ
4. <ÿ
4. 2>
6. 2»

Answer 2

2. > ÿ
   AND
3. > > ÿ

The > symbol is used for STDOUT redirection when creating or overwriting the target of the redirection (such as a file), the&raquo_space; symbol is used for STDOUT redirection when appending the target of the redirection, and the pipe symbol is also used for STDOUT redirection, when redirecting STDOUT from a command as STDIN to the next command in the pipeline.

Question 3

Which of the following is a symbol or symbol combination used for STDERR redirection?

1. |
2. >
3. > >
4. <
5. 2>
6. 2»

Answer 3

5. 2>
   AND
6. 2»

The 2> symbol is used for STDERR redirection when creating or overwriting the target of the redirection (such as a file), and the 2» symbol is used for STDERR redirection when appending the target of the redirection.