Question

which two statements explain reasons to use a computer program to encode digital data?
a. only authorized users can use these data.
b. encoded data can be changed by a computer virus.
c. it adds an extra step that takes more time.
d. the encoding makes digital data more secure.

Explanation:

• Option A: Encoding digital data means that only those with the decryption key (authorized users) can access and use the data. This is a key reason for encoding.
• Option D: Encoding adds a layer of protection. It transforms the data in a way that makes it difficult for unauthorized parties to understand or misuse, thus enhancing security.
• Option B: Encoded data is not more likely to be changed by a computer virus. In fact, encoding is about access and security, not vulnerability to viruses.
• Option C: Taking more time is a drawback, not a reason to use encoding.

Answer:

A. Only authorized users can use these data.
D. The encoding makes digital data more secure.