What is true about USB devices?
A) A particular USB device is specific to the Windows operating system version.
B) A charging USB port cannot provide power even if the computer containing the USB port is powered off.
C) All USB devices require you to load the device driver before connecting the device to the computer.
D) Use the Safely Remove Hardware icon to remove USB devices without damaging them.
D
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How many elements can be stored in the following array? float salaries [4] [3] [50];
What will be an ideal response?
In the array implementation of the queue, if the number of elements used drops to 25% of the capacity, why can’t we immediately just reduce the capacity to one half?
A. There may be too many elements in the queue. B. The queue may be wrapping around the array. C. It would be faster to make some element adjustments first. D. If the array is reduced to one-half its capacity, there may be memory leak for some of the elements.
Answer the following statements true (T) or false (F)
1. The Scanner class has a method next that allows an entire line of string text to be read. 2. Echoing input is good programming practice because it can reveal problems in the input. 3. An if-else statement chooses between two alternative statements based on the value of a Boolean expression. 4. You may omit the else part of an if-else statement if no alternative action is required. 5. In a switch statement, the choice of which branch to execute is determined by an expression given in parentheses after the keyword switch.
__________ is the mortal enemy of a PC.
dirt dust heat grime