How does hashing work?
What will be an ideal response?
Hashing is the mathematical process that produces the message digest or "hash." Hash functions are essentially checksum algorithms. The message is treated as a large number, and it subjects to mathematical transformations that result in the creation of hash. Data is passed to a hash function, and it outputs a fixed-sized hash. Hash functions have the mathematical properties such that passing identical data into the hash function twice always produces identical results. Also, the original message cannot be recreated from the hash. To check for potential tampering, the message recipient rehashes the full message in hand and compares the result with the hash created by the sender. If the hash values do not match, the message has been altered.
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Use a list comprehension to display the numbers from 1 through 30 inclusive that are divisible by 3.
What will be an ideal response?
[CD] Markup the Java code listed in Fig. 5.12 using XML. Represent the if statement with element if—which contains one or more condition elements and one or more statement elements. Element condition contains the condition (e.g., m == month && d == day) and element statement contains the statements (e.g., resultDay = "DATE: D " + d + " M " + m). We have provided comments to the right of conditions and statements for easy identification. Element else represents an else statement in Java and contains one or more statement elements. Render the XML document in IE5.
Fig 5.12
```
if ( ( m == month && d == day ) || // m == month && d == day
( month == -1 && d == day ) || // month == -1 && d == day
( m == month && day == -1 ) || // m == month && day == -1
( month > -1 && day <= -1 ) ) { // month > -1 && day <= -1
resultDay = "DATE: D " + d + " M " + m; // a statement
processChildNodes(dateElement.getChildNodes());// a statement
}
else // else statement
return; // a statement
```
A city or town likely uses a(n) ______.
A. LAN B. MAN C. WAN D. PAN
Bert is considering the use of an infrastructure as a service cloud computing partner to provide virtual servers. Which one of the following would be a vendor responsibility in this scenario?
A. Maintaining the hypervisor B. Managing operating system security settings C. Maintaining the host firewall D. Configuring server access control