Bird
0
0

Which condition correctly checks if the file report.log exists and is not empty in bash?

hard🚀 Application Q9 of 15
Bash Scripting - Conditionals
Which condition correctly checks if the file report.log exists and is not empty in bash?
A[ -f report.log ]
B[ -e report.log -a -s report.log ]
C[ -s report.log ]
D[ -r report.log ]
Step-by-Step Solution
Solution:

  1. Step 1: Understand file test operators

    - -s returns true if file exists and size is greater than zero.
    - -e checks existence only.
    - -f checks if it is a regular file.
    - -r checks readability.

  2. Step 2: Choose the correct test

    Since we want to check existence and non-empty, -s alone suffices.

  3. Final Answer:

    [ -s report.log ] -> Option C

  4. Quick Check:

    Test with an empty and non-empty file [OK]
Quick Trick: Use -s to check file exists and not empty [OK]
Common Mistakes:
MISTAKES
  • Using -e alone which doesn't check file size
  • Combining -e and -s unnecessarily
  • Using -f which ignores file size

Want More Practice?

15+ quiz questions · All difficulty levels · Free

Free Signup - Practice All Questions
More Bash Scripting Quizzes
Bash Scripting Basics - Shebang line (#!/bin/bash) - Quiz 10hard Conditionals - if-elif-else - Quiz 2easy Loops - while loop - Quiz 12easy Quoting and Expansion - Double quotes (variable expansion) - Quiz 1easy Quoting and Expansion - Single quotes (literal strings) - Quiz 10hard User Input - Shifting arguments (shift) - Quiz 2easy User Input - Why input makes scripts interactive - Quiz 1easy User Input - Shifting arguments (shift) - Quiz 4medium User Input - read command - Quiz 9hard Variables - Accessing variables ($var and ${var}) - Quiz 11easy