XK0-006 Automation, Orchestration, and Scripting Practice Question
A developer is writing a Bash script that needs to test whether a file exists and is readable. Which of the following conditionals correctly performs this check?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
if [[ -f $file && -r $file ]]; then
The -f test checks for a regular file, and -r checks if it is readable. Both must be true, so they are combined with &&.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
if test -f $file || test -r $file; then
Why it's wrong here
|| is logical OR, so it checks if either condition is true.
- ✗
if [ -f $file -a -r $file ]; then
Why it's wrong here
While -a works in single brackets, it is deprecated and not recommended; the modern approach uses &&.
- ✓
if [[ -f $file && -r $file ]]; then
Why this is correct
Double brackets are preferred and allow && for logical AND.
- ✗
if [ -f $file -o -r $file ]; then
Why it's wrong here
-o is logical OR, not AND.
Go deeper
Related to this question
Learn chapter
File Permissions and Ownership
Key term
Bash
Bash is a command-line interpreter that lets users interact with an operating system by typing text commands instead of clicking icons.
Key term
Bash script
A Bash script is a text file containing a sequence of commands for the Unix shell Bash, allowing users to automate repetitive tasks and streamline system administration on Linux and macOS.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This XK0-006 practice question is part of Courseiva's free CompTIA certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the XK0-006 exam.