What does BitLocker require on a motherboard to validate on boot that a Windows Vista computer has not been changed?

If you wanted to count the number of entries in a list that contained numbers, text, and blank cells, but ignore the blank cells, which function would you use?

A) COUNTBLANK B) COUNTA C) COUNTIF D) COUNT

A technician has just installed two memory modules on a motherboard that supports DDR3 RAM with the bus speed up to 1600 MHz. The specifications of memory are DDR3 1066 MHz for one module and DDR3 1333 MHz for another. On which of the following bus speeds will the system function?

A. 800 MHz B. 1000 MHz C. 1066 MHz D. 1600 MHz