Suppose you design a computer called the Big Looper 2000 that will never be used to call procedures and that will automatically jump back to the beginning of memory when it reaches the end. Do you need a program counter? Justify your answer.
What will be an ideal response?
In order to design a computer that is not used to call procedures and will automatically jump back to the beginning of memory when it reaches the end, a program counter is not necessary, as a PC’s purpose includes pointing to the current instruction and implementing the branch and jump instructions, so if there are no procedures, then there aren’t any instructions, so there is no reason to have a PC.
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Answer the following statements true (T) or false (F)
1. Under Windows, deleted files or folders are not permanently removed from the computer until you empty the recycle bin. 2. Windows XP has a command line interface that provides access to MS-DOS line commands. 3. The Windows Scripting Host (WSH) allows users to launch MS-DOS batch files. 4. XP makes it easy to write to a CD, in effect treating a CD drive much like a hard disk drive. 5. Windows was the first commercially successful graphical user interface.
There are n people in a room, where n is an integer greater than or equal to 2. Each person shakes hands once with every other person. What is the total number of handshakes in the room? Write a recursive method to solve this problem with the following header:
public static int handshake(int n) where handshake(n) returns the total number of handshakes for n people in the room. To get you started, if there are only one or two people in the room, then: handshake(1) = 0 handshake(2) = 1 This is a short and relatively straightforward recursive problem.
Answer the following statement(s) true (T) or false (F)
1. Some illegitimate sites that advertise free downloads also embed spyware on your system. 2. Always work from a copy of the original file. 3. Antique documents, such as licenses, records, letters, and other forms of paper, usually have the same aging characteristics as photographs. 4. Exposure to light is the main factor causing printed photos to fade. 5. The Spot Healing Brush Tool options bar contains settings for the blending mode of the repair and the sampling methods.
Of Firefox, PowerPoint, Safari, and Internet Explorer, all are widely used web browsers for personal computers EXCEPT ____________________.
Fill in the blank(s) with the appropriate word(s).