NetApp Interview Question: Write a function to copy the ... | Glassdoor

Interview Question

Senior Software Engineer Interview Sunnyvale, CA

Write a function to copy the NULL terminated string? The

  source & destination can be any where with overlap possible. The end result should be that the destination should have string properly without getting corrupted.

Interview Answer

2 Answers


Copy from end to begin so that destination will has the string of source.

Viswesn on Aug 3, 2012

That doesn't work because if src > dst, there is an overlap and strlen( src ) > ( src - dst ) then a backwards copy will corrupt the result.

So you should check if src > dst and if so do a regular forward copy otherwise check if src dst. The catch is that doing that actually adds an extra conditional check and an extra call to the forward function in the code - slightly increasing the code size and execution time.

Michael on Apr 7, 2014

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