Multiple choice technology programming languages

If \$string contains abcdabcd , what will the following call return? index (\$string, “cd”, 3);

  1. 6

  2. 4

  3. -1

  4. 3
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A Correct answer
Explanation

The Perl index function searches for a substring starting at a specified offset. For index($string, "cd", 3), it searches for "cd" in "abcdabcd" starting at index 3. The first occurrence of "cd" starts at index 2, and the second starts at index 6.

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