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231 . Which of the following capabilities is required for a system program to execute more than one program at a time?
A. word processing
B. compiling
C. virtual memory
D. multitasking

232 . Tab scroll buttons are place on Excel screen
A. towards the bottom right corner
B. towards the bottom left corner
C. towards the top right corner
D. towards the top left corner

233 . When a program calls a function that has default parameters, if you omit an argument, you must _____
A. not omit any other arguments
B. omit all arguments
C. omit all arguments to the right of that argument
D. omit all arguments to the left of that argument