Answer:
A. Relative cell reference.
Explanation:
A relative cell reference is like a pointer to a cell or range of cell in Excel. In Excel all cell references, by default, are relative cell references.
In the given instance, the cell address A4 in a formula means it is a relative cell reference. If there would have been a $ sign before A4, then it will be an absolute cell reference. But since, it is without dollar sign, it is a relative cell reference.
Therefore, option A is correct.
<span>The answer is Ten. Substituting numbers for letters, available selections are 111, 112, 113, 122, 123, 133, 222, 223, 233, 333. Note that, for example, 112, 121, and 211 are considered as the same selection.
</span>AAA, BBB, CCC, <span>AAB, AAC, </span><span>BBC, </span><span>ABB, ACC, </span><span>CCB & ABC.</span>
Answer:
.,.,.,.,.,.,.,.,.,.,.,.,.
Answer B: Asymmetric cryptography, because the receiver has its own decryption key and cannot create encrypted messages, because he doesn't have the encryption key.
About the other answers:
A: Private keys are always involved, there has to be some secret to do encryption, so this answer doesn't say very much.
C: Digital signatures can be used to verify/prove some data comes from some person (the signer) in an unaltered way. It is not about encryption, so is not about the security of your message. You use it in combination with encryption.
D: Like A, this doesn't say very much. Shared secret keys (symmetric keys) can be used for encryption, but they are less secure since the keys have to exist in more than one place (sender and receiver).
Answer:
False
Explanation:
The definition for the If-Then-Else structure is as follows:
IF (<em>boolean_condition</em>)
THEN (<em>commands_for_true</em>)
ELSE (<em>commands_for_false</em>)
When there is an ELSE sentence, its commands are to be executed whenever previous conditions where not evaluated as true
.
