Bash Scripting - String Operations
Which of the following is the correct syntax to replace the first occurrence of 'cat' with 'dog' in variable
animal?Which of the following is the correct syntax to replace the first occurrence of 'cat' with 'dog' in variable animal?
easy📝 Syntax Q12 of 15
Step-by-Step Solution
Solution:
Step 1: Identify correct replacement syntax
The correct syntax for replacing the first occurrence is ${variable/old/new}, so ${animal/cat/dog} is correct.Step 2: Check other options for errors
${animal//cat/dog} uses double slash which replaces all occurrences, not just the first. Options C and D use invalid syntax.Final Answer:
${animal/cat/dog} -> Option AQuick Check:
Single slash correct for first occurrence [OK]
Quick Trick: Use single slash for first replacement, double slash for all [OK]
Common Mistakes:
MISTAKES- Using double slash when only first replacement is needed
- Using wrong delimiters like | or : instead of /
- Confusing syntax with substring extraction
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