Bash Intermediate Quiz 2

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Quiz 2
1. What is the correct syntax to define a Bash function?
2. Which operator checks if a file exists?
3. Which command executes a script in the current shell?
4. What does grep -v do?
5. What does the xargs command do?
6. How is string length retrieved?
7. What is the effect of set -u?
8. Which utility extracts columns from text?
9. What does the =~ operator perform?
10. How are hidden files listed?
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