FREE Linux+ Basic Bash Scripting Questions and Answers

Question 1

A Bash script named `process.sh` is executed with the following command:
`./process.sh /var/log/syslog "systemd"`

Inside the script, which special variable would hold the value `"systemd"`?

Accepted Answer

$2

Answer

$0

Answer

$#

Answer

$@

Question 2

A system administrator wants to store the current date and time in a variable within a Bash script. Which of the following syntaxes correctly uses command substitution to achieve this?

Accepted Answer

CURRENT_TIME=$(date)

Answer

CURRENT_TIME='date'

Answer

CURRENT_TIME={date}

Answer

CURRENT_TIME=[date]

Question 3

Examine the following Bash script snippet:

```bash
#!/bin/bash

COUNT=5

if [ $COUNT -gt 10 ]; then
  echo "Greater than 10"
elif [ $COUNT -eq 5 ]; then
  echo "Equals 5"
else
  echo "Something else"
fi
```

What will be the output when this script is executed?

Accepted Answer

Equals 5

Answer

Greater than 10

Answer

Something else

Answer

No output will be produced.

Question 4

A script needs to check the exit status of the most recently executed command to determine if it was successful. Which special variable should be checked?

Accepted Answer

$?

Answer

$!

Answer

$$

Answer

$#

Question 5

Which of the following Bash loops is best suited for iterating through a known, finite list of items, such as a list of filenames?

Accepted Answer

for

Answer

while

Answer

until

Answer

select

Question 6

What is the primary purpose of the `set -e` command at the beginning of a Bash script?

Accepted Answer

To exit the script immediately if any command fails (returns a non-zero exit status).

Answer

To enable verbose mode, printing each command before it is executed.

Answer

To treat unset variables as an error when performing parameter expansion.

Answer

To disable filename generation (globbing).