11. Utilize Bash Commands (file Management, Directory Navigation, and Environmental Variables) 200-901 Practice Questions (Page 6)

Questions 26–29

1. 26foundation · easy

   In Bash, which command sets an environmental variable for the current shell session?

   • Aenv MY_VAR=value
   • Bset MY_VAR=value
   • Cexport MY_VAR=value
   • Decho MY_VAR=value
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2. 27application · easy

   A developer needs to make an environment variable DATABASE_URL available to all future shell sessions for the current user. Which command should be added to the user's shell profile?

   • A`set DATABASE_URL="postgres://localhost:5432/app"`
   • B`env DATABASE_URL="postgres://localhost:5432/app"`
   • C`export DATABASE_URL="postgres://localhost:5432/app"`
   • D`DATABASE_URL="postgres://localhost:5432/app"`
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4. 28foundation · easy

   Which Bash command displays the full path of the current working directory?

   • Als
   • Bcd
   • Cpwd
   • Decho
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5. 29expert · hard

   A network admin is writing a script that must process files in a directory and then archive them. The script needs to handle filenames with spaces and special characters. Which approach is the safest?

   • AUse a for loop with `for file in /var/log/app/*; do ...`
   • BUse `find /var/log/app -type f -print0 | while IFS= read -r -d '' file; do ...`
   • CUse `for file in $(ls /var/log/app); do ...`
   • DUse `ls /var/log/app/*` and parse the output.
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