Which line is used to specify the interpreter for a Bash script?

• A. #!/usr/bin/env python3
• B. start the script with run
• C. #!/bin/zsh
• D. #!/bin/bash

Answer: (D)

The concept being tested is the shebang line. A script’s first line, starting with #!, tells the system which interpreter should run the rest of the file. For a Bash script, the line that selects Bash is a direct path to the Bash executable: #!/bin/bash. This ensures the script is interpreted by Bash regardless of the current shell or how you launch the file. The other lines either invoke a different interpreter (like Python or Zsh) or aren’t valid shebang syntax, so they wouldn’t run the script with Bash.