The most common classes of interrupts are: program, timer, I/O and ________.
Fill in the blank(s) with the appropriate word(s).
hardware failure
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The _________ is concerned with scheduling disk and tape accesses to optimize performance.
A) ?device driver ? B) ?basic I/O supervisor C) ?access method ? D) ?logical I/O
On a traditional IBM mainframe, just before it starts a physical I/O operation, the mainframe operating system places the address of the channel program’s first instruction in the __________.
a. CCW b. PSW c. CAW d. CSW
Defined names can contain ________
A) uppercase and lowercase letters with spaces B) the same value as a cell reference, such as M$10 C) the letter C by itself D) uppercase and lowercase letters
Which of the following will not change the location of the active cell?
A. drag and drop B. scrolling C. clicking another cell D. clicking a column heading