Using good grammar, describe which would be better to use, an infrared or Bluetooth wireless keyboard
What will be an ideal response?
Answers will vary, but a sample answer follows: The infrared keyboard must be kept within line of sight of the transceiver. Bluetooth supports connectivity of up to eight devices, and transmissions are encrypted so the signals cannot be intercepted. Bluetooth would be the better technology to use.
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The kill-wait concurrency control combines the concepts of the immediate update concurrency control and the timestamp-ordered control. As in the timestamp-ordered system, when a transaction, T1 is initiated, it is assigned a timestamp, TS(T1). However, the system uses the same conflict table as the immediate-update pessimistic control does and resolves conflicts using the rule
If transaction T1 makes a request that conflicts with an operation of active transaction, T2 if TS(T1) < TS(T2), then abort T2, else make T1 wait until T2 terminates. where abort T2 is referred to as a kill because T1 kills T2. a. Showthat the kill-wait control serializes in commit order. b. Give a schedule produced by a kill-wait control that is not serializable in timestamp order. c. Explain why deadlock does not occur in a kill-wait control.
A ________ tab aligns the right edge of the text at the tab stop and extends to the left
A) center B) decimal C) left D) right
The shorthand property for border-radius can specify four values in a clockwise direction as follows: ____.
A. top-left, top-right, bottom-right, bottom-left B. bottom-left, bottom-right, top-right, top-left C. top-right, top-left, bottom-left, bottom-right D. bottom-right, bottom-left, top-left, top-right
Which password is used in the BIOS (CMOS) to prevent end users from accessing the BIOS contents?
a. Administrator b. Local c. User d. Supervisor