When Running the Command Sed -E "S/a/b/" /Tmp/file >/Tmp/file While

question 138

Multiple Choice

When running the command sed -e "s/a/b/" /tmp/file >/tmp/file While /tmp/file contains data, why is /tmp/file empty afterwards?

• A) The file order is incorrect. The destination file must be mentioned before the command to ensure redirection.
• B) The command sed did not match anything in that file therefore the output is empty.
• C) When the shell establishes the redirection it overwrites the target file before the redirected command starts and opens it for reading.
• D) Redirection for shell commands do not work using the > character. It only works using the | character instead.

---

Definitions:

Population Increase

The growth in the number of individuals in a population over time.

Commons Dilemma

A situation where individual interests conflict with the collective good, often leading to overuse or depletion of shared resources.

Global Warming

The long-term rise in Earth's average surface temperature, primarily due to human activities such as burning fossil fuels.

Overpopulation

Overpopulation is a condition where an organism's numbers exceed the carrying capacity of its habitat, leading to environmental degradation and diminished quality of life.