Which of the following is true about cryptographic primitives?
A. each performs several tasks
B. a single primitive makes up an entire cryptographic protocol
C. primitives are usually not the source of security failures
D. a primitive that provides confidentiality usually also provides authentication
Answer: C
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Which of the following are not correct?
a. The destructor of a class is not named the same as the name of the class, but preceded with a tilde b. The destructor of a class is not called when an object of the class goes out of scope c. The destructor of a class is not a member of the class d. The destructor of a class is a void function e. all of the above
Sections of most commercial Web sites are off-limits except to subscribers and registered customers and have a(n) ____ Web page that users must go through to get to the off-limits area.
A. password-protected B. protected C. unprotected-entry D. password key
Choose the special character that is used to indicate a blank space.
a. ``` ␣ ``` b. ``` ``` c. ``` © ``` d. ``` &space; ```
In the accompanying figure, what kind of gradient is sample 1?
A. shortened radial B. radial C. linear D. shortened linear