Under which key category do the page up and page down keys fall?

Which function key is used to enable the spelling & grammar function in a word processing program such as microsoft word?

An npn transistor is correctly biased and turned on if the a. base is negative. b. collector is negative. c. collector is positive with respect to the emitter and negative with respect to the base. d. collector is the most positive lead followed by the base.

Which of these is not a type of socket? aga (alternating grid array) pga (pin grid array) spga (staggered pin grid array) lga (land grid array)