Assume that, in addition to the operations read(x) and write(x), a database has the operation increment(x,C), which (atomically) increments the value stored in record x by the constant C, which might be positive or negative. Design a conflict table for these operations for use in an immediate-update pessimistic concurrency control.
What will be an ideal response?
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Models are Ruby on Rails programs that manage the relationship between controllers and the application's database
Answer the following statement true (T) or false (F)
Henry is troubleshooting a network connection and wants to see if he can connect to the server on his network. ? Which Microsoft command-line command should Henry use to check whether he can connect to the server?
A. ipconfig B. netstat C. ifconfig D. ping
Which of the following is an advantage of using static IP addresses for a business?
A. High availability B. Simplifies IP management C. Lower security risk D. Scalability for upgrades
Which log file stores information about which user was logged in, where the user was logged in, and how long the user was logged in.
A. /var/log/mail B. /var/log/wtmp C. /var/log/lastlog D. /var/log/users