What is the output of this code?

medium📝 Command Output Q5 of 15

Bash Scripting - Arrays

arr=(10 20 30 40)
echo ${arr[@]:1:2}

A10 20

B20 30

C30 40

D20 30 40

Step-by-Step Solution

Solution:

Step 1: Understand array slicing syntax
${arr[@]:start:length} extracts elements starting at index 'start' for 'length' elements.
Step 2: Apply slicing to given array
Starting at index 1 (20), length 2 elements are 20 and 30.
Final Answer:
20 30 -> Option B
Quick Check:
Slice from index 1 length 2 = 20 30 [OK]

Quick Trick: Use ${arr[@]:start:length} to slice array elements [OK]

Common Mistakes:

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