Which of the following will invalidate a signature added to the document?
1. opening the document
2. Changing the content of the document
3. Saving document to an external storage device
4. Nothing can invalidate a signature
How to participate:
- Answer the above question and providing your email address along.
- Only the answer provided with email address will be marked.
- Only the first correct answer will be considered.
- For further details kindly refer to the Competition Rules and Guidelines.