A useful guideline to protect corporate computers from criminal hackers is to:
a. install antivirus software on all computers.
b. enable physical access to servers.
c. provide overfriendly sign-in procedures for remote users.
d. enable several guest accounts
Answer: a. install antivirus software on all computers.
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Consider distributed optimistic concurrency control in which each server performs local backward validation sequentially (that is, with only one transaction in the validate and update phase at one time. Describe the possible outcomes when the two transactions attempt to commit. What difference does it make if the servers use parallel validation?
What will be an ideal response?
If the same change needs to be made in several records, it is more efficient to use an update query to make the changes
Indicate whether the statement is true or false
Browsing is the term used to describe viewing Web pages with your computer
Indicate whether the statement is true or false
Primary keys must be numbers
Indicate whether the statement is true or false